A600 M42 T11342 - ASTM A600-1992(R2024)

Grade	A600 M42
USA UNS	T11342
AISI American Iron and Steel Institute	M42
Corresponding Standard	ASTM A600-1992(R2024) Standard Specification for Tool Steel High Speed
Classification	Alloy Steel

A600 M42 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Mo	W	V	Co	More
Minimum Value	1.05	0.15	0.15	-	-	3.5	9	1.15	0.95	7.75	Ni+Cu≤ 0.75
Maximum Value	1.15	0.65	0.4	0.03	0.03	4.25	10	1.85	1.35	8.75	Ni+Cu≤ 0.75

A600 M42 Mechanical Properties

	Heat Treatment or Condition	Hardness HBW
Bars, forgings, thick plates, thin plates, strip products	Cold Drawing	≤285
Bars, forgings, thick plates, thin plates, strip products	Cold Drawn and Annealed	≤277
Bars, forgings, thick plates, thin plates, strip products	Annealing	≤269
Bars, forgings, thick plates, thin plates, strip products	Heat Treatment ①	HR ≥66

1 Approximate Comparison Table High-Speed Steel 2

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

Sweden

United Kingdom

ISC

CNS

JIS

ASTM

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

SS₁₄

BS EN/BS

W2Mo9Cr4VCo8

T72948

SKH59

M42

T11342

HS 2-9-1-8

S 2-10-1-8

1.3247

HS 2-9-1-8

2716

HS 2-9-1-8
BM42

2 Approximate Comparison Table High-Speed Steel 3

China		Japan	United States		International Organization for Standardization	European Standard	Russia
GB	ISC	JIS	ASTM	UNS	ISO	EN	GOST
W2Mo9Cr4VCo8	T72948	SKH59	M42	T11342	HS 2-9-1-8	HS 2-9-1-8	Р2АМ9К5

A600M42 Corresponding Standards(Same grade name, different standards)

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