1.2367 Tool Steel Flat Bar (Premium Heavy-Duty Hot Work Die Steel)

Product Description

FUSHUN METAL's 1.2367 Tool Steel Flat Bar is a premium heavy-duty hot work die steel offering an exceptional combination of superior heat resistance, outstanding toughness, excellent thermal fatigue resistance, and high wear resistance. With a carefully engineered chemical composition featuring optimized proportions of chromium, molybdenum, vanadium, and nickel, our 1.2367 flat bar delivers remarkable performance under the most extreme hot working conditions. Available in precision-milled finishes and tight dimensional tolerances, this specialized flat steel bar is ideal for demanding applications in heavy-duty hot forging dies, large die casting tools, hot extrusion tooling, and other applications requiring exceptional resistance to thermal fatigue, plastic deformation, and wear at elevated temperatures up to 600°C (1110°F). Unlike standard hot work steels, FUSHUN METAL's 1.2367 flat bars provide superior toughness combined with excellent high-temperature strength, ensuring extended tool life and reliable performance in the most severe hot working applications. Each bar undergoes comprehensive quality control to ensure consistent properties, precise dimensions, and superior surface quality for maximum performance in critical heavy-duty hot work tooling applications.

Flat Bar Specifications

FUSHUN METAL offers 1.2367 Tool Steel Flat Bar in a comprehensive range of specifications to meet diverse application requirements:

Available Dimensions

* Custom dimensions available upon request

Dimensional Tolerances

Surface Finishes

• Hot Rolled: Standard industrial finish
• Hot Rolled and Annealed: Stress relieved for better machinability
• Hot Rolled, Annealed, and Pickled: Clean scale-free surface
• Precision Ground: Four sides ground with precision tolerances
• Fine Milled: High-quality surface finish with tight tolerances
• Polished: Smoother finish for reduced post-processing requirements
• Custom Finishes: Available upon request for specific applications

Supply Conditions

• Annealed: Soft condition for optimal machinability (180-230 HB)
• Pre-hardened: Hardened and tempered to 35-42 HRC for applications requiring moderate hardness
• Fully Heat Treated: Hardened and tempered to 42-50 HRC for immediate use
• Custom Heat Treatment: Available to meet specific hardness and toughness requirements

Packaging Options

• Individual Plastic Wrapping: For protection against environmental contaminants
• Wooden Crates: For secure shipping of multiple bars
• Steel Strapped Bundles: For economical shipping of standard orders
• VCI Paper Wrapping: For enhanced corrosion protection
• Oil Coating: Available for additional corrosion protection
• Custom Packaging: Available to meet specific handling and storage requirements
• Heavy-Duty Packaging: Specialized options for large sections and export shipments

Applications

FUSHUN METAL's 1.2367 Tool Steel Flat Bar is specifically engineered for applications requiring an optimal combination of high-temperature strength, exceptional toughness, thermal fatigue resistance, and wear resistance:

Heavy-Duty Hot Forging Applications

• Large forging dies for heavy-duty applications
• Hammer and press forging dies for automotive components
• Forging tools for aerospace parts
• Hot heading tools for large fasteners
• Dies for hot upset forging
• Heavy-duty punches for hot forging operations
• Mandrels for hot forging applications
• Hot trimming tools for forged parts

Die Casting Applications

• Large die casting dies for aluminum parts
• Critical inserts in die casting tools
• Cores and slides for die casting molds
• Shot sleeves for aluminum die casting
• Pressure blocks for die casting machines
• Sprue bushings for high-pressure die casting
• Core pins for die casting tools
• Die components exposed to severe thermal cycling

Extrusion Applications

• Dies for hot extrusion of aluminum profiles
• Container liners for extrusion presses
• Dummy blocks for aluminum extrusion
• Extrusion stems and mandrels
• Tooling for copper and brass extrusion
• Dies for aluminum extrusion with thin-walled sections
• Bolsters and die backers for extrusion tooling
• High-wear components in extrusion equipment

Hot Stamping and Press Hardening

• Hot stamping dies for high-strength automotive parts
• Press hardening tools for ultra-high-strength steel
• Hot forming punches and dies
• Hot trim and pierce tooling
• Large hot forming tools for structural components
• Progressive hot forming dies
• Hot shearing and cutting tools
• Thermal forming tooling for advanced high-strength steels

Specialty Applications

• Hot work punches for heavy-duty applications
• Tooling for isothermal forging processes
• Mandrels for seamless tube production
• Dies for hot calibration operations
• Critical tooling components requiring high toughness at elevated temperatures
• Hot shear blades for cutting at elevated temperatures
• Plastic molds requiring exceptional toughness and heat resistance
• Tooling for powder metallurgy hot compaction

Chemical Composition

FUSHUN METAL's 1.2367 Tool Steel Flat Bar features the following nominal composition per DIN 17350/EN ISO 4957 standards:

Key Element Functions

• Carbon (0.35-0.42%): Provides optimal hardness and strength while maintaining excellent toughness. The moderate carbon content offers a good balance between wear resistance and thermal fatigue resistance.
• Chromium (4.80-5.50%): Enhances hardenability, wear resistance, and oxidation resistance at elevated temperatures. Forms stable carbides that maintain hardness at high operating temperatures.
• Molybdenum (2.80-3.20%): Significantly higher than in standard hot work steels, molybdenum dramatically improves hot strength, creep resistance, and resistance to softening at elevated temperatures. This is a key differentiating element in 1.2367 compared to other hot work tool steels.
• Vanadium (0.40-0.60%): Forms fine, hard carbides that provide resistance to wear and abrasion. Refines grain structure for improved toughness and contributes to secondary hardening during tempering.
• Nickel (0.20-0.50%): Enhances toughness and resistance to thermal fatigue. Improves hardenability and reduces distortion during heat treatment.
• Silicon (0.30-0.50%): Improves oxidation resistance and high-temperature strength. Contributes to overall toughness of the steel.
• Manganese (0.30-0.50%): Enhances hardenability and contributes to strength.

Physical and Mechanical Properties

Our 1.2367 Tool Steel Flat Bar offers an impressive combination of physical and mechanical properties that make it ideal for demanding hot work applications:

Physical Properties

Mechanical Properties (Annealed Condition)

Mechanical Properties (Hardened and Tempered to 44-46 HRC)

Mechanical Properties (Hardened and Tempered to 48-50 HRC)

Hot Hardness

1.2367 maintains exceptional hardness at elevated temperatures, which is crucial for hot work applications:

Special Features of FUSHUN METAL's 1.2367 Tool Steel Flat Bar

Our 1.2367 Tool Steel Flat Bar offers several distinctive advantages that set it apart from conventional hot work tool steel products:

Superior Performance in Extreme Conditions

1.2367 provides exceptional performance in the most demanding hot work applications:

• Outstanding High-Temperature Strength: The high molybdenum content (2.8-3.2%) provides exceptional resistance to plastic deformation and creep at elevated temperatures, exceeding the performance of standard hot work steels.
• Excellent Hot Hardness: Maintains hardness and strength at elevated temperatures up to 600°C (1110°F), with superior retention compared to H11 and H13 grades.
• Exceptional Thermal Fatigue Resistance: Outstanding resistance to heat checking and thermal cracking during repeated heating and cooling cycles, crucial for long tool life in cyclic hot working operations.
• Excellent Toughness: Superior toughness compared to most hot work tool steels, reducing the risk of premature failure in heavy-duty applications.
• Good Wear Resistance: Provides adequate resistance to abrasive and adhesive wear at elevated temperatures for extended tool life.
• Thermal Shock Resistance: Excellent resistance to cracking when subjected to rapid temperature changes.
• Dimensional Stability: Superior resistance to warpage and dimensional changes during thermal cycling, ensuring consistent part quality throughout tool life.

Balanced Mechanical Properties

1.2367 offers an excellent combination of properties for demanding hot work applications:

• Strength-Toughness Balance: Unique combination of high strength and exceptional toughness at both room and elevated temperatures, making it ideal for heavy-duty applications.
• High Compressive Strength: Excellent resistance to plastic deformation under high loads, even at elevated temperatures.
• Good Machinability: Despite its high alloy content, maintains reasonable machinability in the annealed condition.
• Polishability: Can be polished to a good finish, important for die casting and extrusion applications.
• Weldability: Can be welded with proper precautions, allowing for repairs and modifications.
• Thermal Conductivity: Good thermal conductivity for a high-alloy tool steel, promoting more uniform heating and cooling.
• Oxidation Resistance: Good resistance to scaling and oxidation at elevated temperatures due to chromium content.

Heat Treatment Response

1.2367 offers predictable and favorable response to heat treatment:

• Superior Hardenability: Achieves through-hardening in large sections up to 200mm with appropriate quenching, ideal for large die blocks.
• Dimensional Stability: Exhibits minimal distortion during heat treatment when properly processed.
• Secondary Hardening: Pronounced secondary hardening effect during tempering, contributing to excellent hot hardness.
• Wide Hardening Range: Can be hardened to various hardness levels (40-52 HRC) to optimize the balance between wear resistance and toughness for specific applications.
• Double Tempering Response: Responds exceptionally well to double or triple tempering for optimal property development.
• Predictable Size Change: Undergoes minimal and predictable dimensional changes during proper heat treatment.
• Homogeneous Properties: Achieves uniform properties throughout the cross-section in large tool blocks, ensuring consistent performance.

Manufacturing Excellence

FUSHUN METAL employs specialized processes to ensure our 1.2367 flat bars deliver reliable performance in critical applications:

• Premium Melting Processes: Vacuum degassed or electroslag remelted options available for enhanced cleanliness and performance in critical applications.
• Precise Chemical Control: Tight control of alloying elements, particularly molybdenum, to ensure consistent heat treatment response and mechanical properties.
• Controlled Forging: Optimized forging practices to ensure homogeneous microstructure and uniform carbide distribution.
• Optimized Annealing: Precise annealing cycles to achieve uniform hardness and excellent machinability.
• Stress Relieving: Proper stress relief treatments to minimize distortion during machining and subsequent heat treatment.
• Precision Milling: Advanced milling capabilities to achieve tight dimensional tolerances and excellent surface finish.
• Rigorous Inspection: Comprehensive non-destructive testing to ensure internal quality and surface integrity.
• Ultrasonic Testing: 100% ultrasonic inspection for large sections to guarantee internal soundness.

Heat Treatment Recommendations

For customers performing their own heat treatment of 1.2367 tool steel flat bar, FUSHUN METAL recommends the following parameters:

Stress Relieving

• Heat slowly to 650-700°C (1200-1290°F)
• Hold for minimum 2 hours per 25mm of thickness
• Cool slowly in furnace to below 500°C (930°F), then air cool
• Recommended before extensive machining to minimize distortion

Annealing

• Heat slowly to 820-850°C (1510-1560°F)
• Hold for 1-2 hours per 25mm of thickness
• Cool slowly in furnace at a rate not exceeding 15°C (27°F) per hour to 600°C (1110°F)
• Continue cooling in furnace or air
• Resulting hardness: 180-230 HB

Hardening

• Preheating: Step 1: 650-750°C (1200-1380°F)
• Preheating: Step 2: 850-950°C (1560-1740°F)
• Austenitizing: 1000-1050°C (1830-1920°F)
  • Lower temperatures for better toughness, higher temperatures for maximum wear resistance
• Holding time: 20-45 minutes after thorough heating (minimum 30 minutes for sections over 50mm)
• Quenching: Oil, warm bath at 500-550°C (930-1020°F), or positive pressure gas quenching
• For complex shapes and large sections, martempering in salt bath is strongly recommended to minimize distortion
• Achievable hardness after quenching: 52-56 HRC

Tempering

• Temper immediately after cooling to hand-warm temperature (50-70°C/120-160°F)
• Tempering temperature selection based on desired final hardness:
  • 550-580°C (1020-1075°F): 44-48 HRC (balanced wear resistance and toughness)
  • 580-620°C (1075-1150°F): 40-44 HRC (maximum toughness for heavy duty applications)
  • 520-550°C (970-1020°F): 48-50 HRC (increased wear resistance for less severe applications)
  • 470-520°C (880-970°F): 50-52 HRC (maximum hardness, but reduced toughness)
• Hold at temperature for minimum 2 hours (1 hour per 25mm thickness recommended)
• Triple tempering recommended (minimum two tempers)
• Cool to room temperature between tempering cycles

Nitriding

• For enhanced surface hardness and wear resistance, 1.2367 responds well to nitriding
• Perform after final heat treatment and tempering at minimum 540°C (1000°F)
• Gas nitriding: 500-520°C (930-970°F) for 10-30 hours
• Plasma nitriding: 480-520°C (895-970°F) for 4-12 hours
• Salt bath nitriding: 540-560°C (1000-1040°F) for 2-4 hours
• Achievable surface hardness: 950-1100 HV (68-70 HRC)
• Typical case depth: 0.1-0.3 mm

Quality Assurance and Testing

Every batch of FUSHUN METAL's 1.2367 Tool Steel Flat Bar undergoes rigorous testing to ensure it meets our exacting quality standards:

• Chemical Composition Analysis: Spectrographic testing to verify precise element content critical for performance, with special attention to molybdenum, chromium, and vanadium levels.
• Mechanical Property Testing: Hardness testing to confirm proper annealing or heat treatment.
• Microstructural Examination: Metallographic analysis to verify proper structure, grain size, and carbide distribution.
• Ultrasonic Testing: 100% ultrasonic inspection available to detect internal defects and ensure soundness, critical for large sections.
• Magnetic Particle Inspection: Available to detect surface or near-surface defects.
• Dimensional Verification: Precision measurement to ensure tight dimensional tolerances.
• Flatness Testing: Verification of flatness to ensure minimal warpage.
• Heat Treatment Response Verification: Sample testing to confirm proper response to hardening and tempering.
• Hot Hardness Testing: Available to verify performance at elevated temperatures.
• Hardenability Testing: Jominy end-quench testing available upon request.
• Inclusion Assessment: Evaluation of non-metallic inclusion content for critical applications.
• Carbide Distribution Analysis: Examination of carbide type, size, and distribution for performance-critical applications.
• Impact Testing: Charpy V-notch impact tests to verify toughness for critical applications.

Certifications Provided

• Material Test Certificates according to EN 10204 3.1
• Chemical composition analysis
• Mechanical property test results
• Dimensional inspection report
• Heat treatment certification when applicable
• Special property verifications available upon request
• Certificate of conformity to ordered specifications
• Ultrasonic testing reports when specified
• Metallographic examination reports when specified
• Impact test certification when specified

International Standards Compliance

Our 1.2367 Tool Steel Flat Bar complies with the following international standards:

Machining Recommendations

To achieve optimal results when machining 1.2367 tool steel flat bars, FUSHUN METAL recommends the following parameters:

Annealed Condition (180-230 HB)

Hardened and Tempered Condition (44-48 HRC)

* These values are guidelines only; adjustments may be necessary based on specific equipment and conditions

Machining Tips

• Use rigid setups with minimum overhang to minimize vibration and chatter.
• Apply adequate cooling, especially when machining in hardened condition.
• For complex geometries, consider machining in the annealed condition and then heat treating.
• Use sharp tools and replace at regular intervals to maintain dimensional accuracy.
• After EDM processing, remove the affected layer by grinding or polishing to ensure maximum tool performance.
• After heavy machining, consider stress relieving to minimize distortion during final heat treatment.
• When grinding hardened material, use gentle cutting conditions and adequate cooling to prevent rehardening of the surface.
• The higher molybdenum content in 1.2367 causes increased tool wear compared to standard hot work steels; adjust tooling selection and cutting parameters accordingly.
• For large sections, consider roughing out the profile in annealed condition before final heat treatment.
• For critical dimensions, allow for slight growth during heat treatment (typically 0.05-0.10%).

Welding Recommendations

1.2367 can be welded with proper precautions and procedures, though more care is required than with standard hot work steels due to its higher alloy content:

• Preheat: 300-400°C (570-750°F) depending on section thickness
• Filler Material: Matching composition or AWS A5.14 ERNiCrMo-3
• Process: TIG/GTAW strongly preferred for highest quality; MMA/SMAW also suitable with low hydrogen electrodes
• Interpass Temperature: Maintain 300-400°C (570-750°F)
• Post-weld Heat Treatment: Cool slowly to 100°C (212°F), then temper immediately at a temperature 25-50°C (45-90°F) below the previous tempering temperature
• Hydrogen Control: Use low hydrogen processes and consumables; bake electrodes according to manufacturer recommendations
• Joint Design: Use simple joint designs with adequate access; avoid sharp corners
• Special Consideration: Due to high molybdenum content, 1.2367 requires careful welding procedures and is more susceptible to cracking than standard hot work steels
• Pre-weld Stress Relief: For repair welding of tools in service, a stress relief treatment is recommended before welding

Comparative Advantages over Other Tool Steel Grades

Understanding how 1.2367 tool steel flat bar compares to other grades helps in selecting the optimal material for your application:

Application-Specific Recommendations

FUSHUN METAL provides tailored recommendations for specific applications of 1.2367 tool steel flat bar:

Heavy-Duty Hot Forging Applications

• Recommended hardness: 42-46 HRC for heavy duty forging, 46-48 HRC for precision forging
• Ideal for large dies subject to extreme thermal and mechanical stresses
• Ensure adequate corner and fillet radii to minimize stress concentration (minimum 3-5mm for large dies)
• Preheat dies to 200-350°C (390-660°F) before use for increased thermal fatigue resistance
• Design proper cooling channels for temperature control during operation
• Triple tempering strongly recommended for maximum dimensional stability in large sections
• Consider using premachined blocks with subsequent stress relieving before final machining
• For extremely large dies, consider ESR (Electroslag Remelted) material for enhanced internal cleanness
• Regular inspection for heat checking recommended to prevent catastrophic failure

Die Casting Applications

• Recommended hardness: 44-46 HRC for aluminum, 42-44 HRC for zinc, 46-48 HRC for magnesium
• Ideal for large die casting dies where thermal fatigue and plastic deformation are primary concerns
• For very large dies, consider a lower hardness range to improve crack resistance
• Design with adequate cooling channels to minimize thermal gradients
• Polish in the direction of material flow to optimize release
• Consider nitriding for enhanced surface durability and better release properties
• Proper preheating and cooling of the die essential for maximum life
• For large dies with inserts, ensure proper fit and support to prevent movement during operation
• PVD coating can be applied for improved surface performance in erosive conditions

Extrusion Applications

• Recommended hardness: 46-48 HRC for aluminum extrusion, 44-46 HRC for copper/brass extrusion
• Ideal for container liners and extrusion stems subject to high thermal and mechanical stresses
• For large extrusion tools, ensure uniform heating during heat treatment
• Consider nitriding for dies and components subject to severe abrasive wear
• Proper preheating of tooling before use is essential to minimize thermal shock
• For complex profile dies, ensure proper support and reinforcement to prevent deflection
• Allow adequate cooling time between extrusion cycles to prevent overheating
• Regular maintenance and refinishing of die surfaces recommended to optimize performance

Customization Capabilities

FUSHUN METAL offers extensive customization options to meet your specific application requirements:

• Custom Dimensions: Special sizes manufactured to exact specifications for your application, including extra-large sections up to 200mm thickness.
• Modified Chemical Composition: Slight adjustments to standard composition available to optimize specific properties.
• Special Melting Routes: Vacuum degassed or electroslag remelted material available for critical applications requiring enhanced cleanliness.
• Pre-Machining Services: Basic machining including cutting to length, face milling, drilling, and tapping available.
• Heat Treatment Services: Custom heat treatment to achieve specific hardness and toughness combinations.
• Surface Treatments: Nitriding, PVD coating, and other treatments available upon request.
• Specialized Testing: Application-specific testing protocols available upon request.
• Custom Packaging: Specialized packaging for long-term storage or export shipments.
• Edge Preparation: Chamfering and deburring of edges for safe handling.
• Technical Consultation: Expert metallurgical support for your specific application challenges.
• Material Certification: Enhanced certification packages for critical applications.
• Rough Machining: Pre-machined die blocks available to reduce your processing time.

Why Choose FUSHUN METAL for 1.2367 Tool Steel Flat Bar

When you select FUSHUN METAL as your supplier for 1.2367 Tool Steel Flat Bar, you partner with a leading manufacturer committed to excellence:

• Hot Work Tool Steel Expertise: Specialized experience in manufacturing premium high-molybdenum hot work tool steel products with optimal properties.
• Advanced Production Facilities: State-of-the-art melting, forging, and processing equipment specifically optimized for large and specialty tool steels.
• Stringent Quality Control: Comprehensive testing and inspection protocols ensure consistent performance in demanding applications.
• Metallurgical Knowledge: In-depth understanding of heat treatment and microstructural control of hot work tool steels.
• Supply Chain Reliability: Robust inventory management and production planning to ensure consistent availability of critical materials.
• Technical Support: Expert assistance in material selection, heat treatment guidance, and application support.
• Global Capabilities: Worldwide shipping network with experience in international documentation and compliance.
• Material Traceability: Complete documentation and batch traceability for quality assurance.
• Continuous Improvement: Ongoing research and development in tool steel processing and performance.
• Industry Compliance: Materials and processes that meet or exceed international standards for critical applications.
• Competitive Pricing: Excellent value combined with superior quality and service.
• Environmental Responsibility: Commitment to sustainable manufacturing practices and environmental management.

Request Information

Contact FUSHUN METAL today to discuss your 1.2367 Tool Steel Flat Bar requirements. Our technical team is ready to assist you with:

• Detailed product specifications
• Technical consultations for your specific application
• Heat treatment recommendations for optimal properties
• Custom dimension and processing requirements
• Pricing inquiries and delivery schedules
• Sample requests for evaluation

FUSHUN METAL – Your trusted partner for premium heavy-duty hot work tool steel solutions that deliver consistent quality, superior high-temperature performance, and exceptional reliability in the most demanding hot working applications.