16NiCrS4 1.5715 Hot Forged Alloy Steel Round Bar

Categories	Alloy Steel Bars
Brand	fushun
Model	16NiCrS4 1.5715
Delivery Condition	+QT or annealed
Surface Condition	black or grounded or peeled
Update Time	Apr 29,2024

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Detail Information

16NiCrS4 1.5715 Case Hardening Steels

Grade :16NiCrS4 Number: 1.5715 Classification: Alloy special steel

Supplying Size:Forging: 80-600mm

Standard:

EN 10277-4: 2008 Bright steel products. Technical delivery conditions. Case hardening steels

EN 10084: 2008 Case hardening steels. Technical delivery conditions

Equivalent grades of steel 16NiCrS4 (1.5715)

EU	USA	Italy	Sweden
EN	-	UNI	SS
16NiCrS4	3115	16NiCrS4	SS2511

Chemical composition %

C	Si	Mn	Ni	P	S	Cr
0.13 - 0.19	max 0.4	0.7 - 1	0.8 - 1.1	max 0.025	0.02 - 0.04	0.6 - 1

Mechanical properties of 16NiCrS4 (1.5715)

Steel name	Steel number	Thickness mm	+A + turned (+A +SH) Hardness HBW max.	+A + cold drawn (+A +C) Hardness HBW max.	+FP + turned (+FP +SH) Hardness HBW	+FP + cold drawn (+FP +C) Hardness HBW
16NiCrS4	1.5715	≥5 ≤10	-	270	-	-
		> 10 ≤16	-	260	-	-
		> 16 ≤40	217	255	156 to 207	156 to 245
		> 40 ≤63	217	255	156 to 207	156 to 240
		>63 ≤100	217	255	156 to 207	156 to 240

+A= soft annealed

+FP= treated to ferrite-pearlite structure and hardness range

Finished condition

a) drawn, symbol +C;

b) turned, symbol +SH;

c) ground, symbol +SL.

Heat Treatment

Process	time	Temperatures
Austenitizing	30 - 35 min	880℃
Carburizing		880 - 980℃
Core-hardening		850 - 890℃
Case-hardening		780 - 820℃
Tempering	1 h minimum	150 - 200℃

Introduction

16NiCrS4 is a low-alloy (chrome-nickel) case-hardening steel. Machining of larger components with complex shape, e.g. gear wheels, is facilitated by the steel being soft-annealed after forging to achieve a hardness of 217 HB or below.

16NiCrS4 is standardised in SS-EN ISO 683 - 3. The hardness as supplied corresponds to “+A” (soft annealed). The (discontinued) SS-designation is 2511.

Base hardenability is an important characteristic of case-hardening steels since it determines core properties after hardening and tempering. It is normally specified in terms of a Jominy diagram, which gives the hardness distribution as read off on a sample which has been hardened by directing a spray of water at its one end according to a standardised procedure. The addendum “+HL” after the steel name signifies that the analysis is controlled such that the Jominy curve lies between limits which are stipulated in the SS-EN ISO 683 - 3 standard.