616 (S42226/1.4935) Heat-Resistant Stainless Steel | High Strength | Aerospace & Power Generation

616 (S42226/1.4935) Heat-Resistant Stainless Steel - FUSHUN METAL

Introduction

616 (also designated as S42226, 1.4935, X20CrMoWV12-1, SUH616, 15X12BHMФ, S47220/22Cr12NiWMoV/2Cr12NiWMoV) is a heat-resistant martensitic stainless steel primarily composed of chromium, molybdenum, tungsten, vanadium and nickel. It exhibits excellent high-temperature strength, creep resistance and oxidation resistance, making it ideal for high-temperature service environments. This grade is a key product in FUSHUN METAL's heat-resistant stainless steel portfolio, widely used in aerospace and power generation industries. For more category information, you can also visit our martensitic stainless steel page.

Applications

• Aerospace industry: Turbine blades, engine components, aircraft exhaust systems
• Power generation: Gas turbine parts, boiler components, high-temperature valves
• Petrochemical industry: High-temperature reaction vessels, heat exchanger tubes
• Mechanical engineering: High-temperature fasteners, die casting molds for high-temperature applications

Standards

• ASTM: A240 (plates/sheets), A479 (bars/rods), A182 (forged fittings)
• DIN/EN: EN 10088-3 (stainless steels for general use), EN 10216-5 (seamless tubes)
• JIS: G4311 (heat-resistant stainless steel bars), G4312 (heat-resistant stainless steel plates)
• GB: GB/T 1220 (stainless steel bars), GB/T 3280 (stainless steel plates/sheets)

Dimensions, MOQ & Delivery Time

FUSHUN METAL offers comprehensive processing capabilities for 616 stainless steel, with advanced 6000-ton forging presses and radial forging machines to meet various size requirements:

• Rolled round bars: Diameter Φ10mm - Φ500mm
• Rolled flat bars: Thickness 5mm - 200mm, Width 20mm - 600mm
• Forged round bars: Diameter Φ50mm - Φ1200mm
• Forged flat bars: Thickness 20mm - 500mm, Width 50mm - 1500mm
• Steel plates: Thickness 3mm - 300mm, Width 1000mm - 3000mm, Length 2000mm - 12000mm
• Steel wire: Diameter Φ0.8mm - Φ20mm

Delivery Time & MOQ:

• Ready Stock (regular sizes): MOQ 1 piece, delivery time 7 days
• Custom forgings/rolled products: MOQ 3 tons, delivery time 30 days
• Steelmaking (small furnace): MOQ 3-5 tons (based on specific requirements)
• Large batch production (30-60 ton electric arc furnace): Fast delivery, short lead time

Chemical Composition (wt%)

Smelting Process

FUSHUN METAL adopts advanced smelting processes for 616 stainless steel to ensure product quality, with customizable options based on customer requirements:

• Standard process: EAF (Electric Arc Furnace) + LF (Ladle Furnace) + VD (Vacuum Degassing) + AOD (Argon Oxygen Decarburization) (essential for stainless steel)
• High requirement: EAF+LF+VD+AOD + ESR (Electroslag Remelting) / PESR (Pressurized Electroslag Remelting)
• Ultra-high requirement: VIM (Vacuum Induction Melting) + VAR (Vacuum Arc Remelting) + AOD

We can adjust the smelting process according to your specific application scenarios and quality requirements.

Mechanical Properties

Heat Treatment

• Annealing: Heat to 850-900°C, hold for 2-4 hours, cool slowly in furnace (cooling rate ≤50°C/h) to room temperature
• Quenching: Heat to 1020-1080°C, hold for 1-2 hours (based on size), quench in oil or air cooling
• Tempering: Heat to 650-750°C, hold for 2-4 hours, air cooling to room temperature; double tempering is recommended for large forgings

Surface Treatment & Precision

We provide various surface treatment options for different shapes of 616 stainless steel products, with precise dimensional tolerance control:

• Turned finish (for round bars/flat bars): Surface roughness Ra 1.6-3.2 μm, dimensional tolerance ±0.05mm
• Ground finish (for round bars/wire): Surface roughness Ra 0.4-1.6 μm, dimensional tolerance ±0.01mm
• Milled finish (for flat bars/plates): Surface roughness Ra 1.6-6.3 μm, dimensional tolerance ±0.1mm
• CNC machining (for custom parts): Surface roughness Ra 0.8-3.2 μm, dimensional tolerance ±0.02mm
• Black finish (as-forged/as-rolled): Surface roughness Ra 12.5-25 μm, dimensional tolerance ±1mm (for forgings) / ±0.5mm (for rolled products)

Inspection & Certification

• Pre-production: Raw material inspection (chemical composition verification, surface quality check) - 100% inspection
• In-production: Process parameter monitoring (temperature, time, pressure) + dimensional spot check (10% sampling rate)
• Post-production: Comprehensive inspection - Ultrasonic Testing (UT) per ASTM A609 / EN 10228-3 (100% for forgings ≥50mm diameter), chemical composition analysis (OES/ICP), mechanical property testing (tensile, hardness), metallographic examination, dimensional full inspection
• Certification: We can provide 3.1 certificate (mill test report), 3.2 certificate (independent third-party inspection), and SGS/TUV certified reports upon request
• Quality system: FUSHUN METAL is certified to ISO 9001, and our aerospace-grade products comply with AS9100 standards

Packaging & Rust Prevention

• Black finish products: Bound with steel wire, reinforced with wooden pallets to prevent damage during container transportation
• Bright finish products: Optional packaging materials (PE film, kraft paper, anti-rust paper) to protect surface roughness and dimensional accuracy
• Anti-rust treatment: All products are coated with anti-rust oil before shipment to ensure no rust during sea transportation

Frequently Asked Questions (FAQ)

• Q: Can you cut 616 stainless steel to my specific length?
  A: ✓ Yes, we can cut to any custom length as per your requirements, with cutting tolerance ±0.5mm.
• Q: What is the hardness of 616 in annealed condition?
  A: The hardness of 616 stainless steel in annealed condition is 200-250 HB.
• Q: Do you provide UT inspection reports for 616 forgings?
  A: ✓ Yes, we provide 100% UT inspection for 616 forgings and issue corresponding test reports.
• Q: Can you produce 616 stainless steel with VIM+VAR smelting process?
  A: ✓ Yes, we can customize the smelting process including VIM+VAR for ultra-high requirement applications.