SKH 55 - JIS G 4403-2005

Grade	SKH 55
Corresponding Standard	JIS G 4403-2005 High speed tool steels
Classification	Tool Steel

SKH 55 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo	W	V	Co
Minimum Value	0.87	-	-	-	-	3.8	-	4.7	5.9	1.7	4.5
Maximum Value	0.95	0.45	0.4	0.03	0.03	4.5	0.25	5.2	6.7	2.1	5

SKH 55 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
Bar, forging	Annealing	≤269
Bar, forging	Quenching + Tempering	HRC ≥64

1 Approximate Comparison Table High-Speed Tool Steels

Japan	International Organization for Standardization	Germany		European Standard
JIS	ISO	DIN EN/DIN	W-Nr.	EN	Numerical Grade
SKH55	HS6-5-2-5	HS6-5-2-5 (S 6-5-2-5)	1.3243	HS6-5-2-5	1.3243

2 Approximate Comparison Table High-Speed Steel 3

China	Japan	International Organization for Standardization	Germany	France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	ISO	DIN EN/DIN	NF EN/NF	EN	Numerical Grade	GOST	SS₁₄	BS EN/BS
W6Mo5Cr4V2Co5	SKH55	HS6-5-2-5	S6-5-2-5	Z85WDKCV06-05-04-02	HS6-5-2-5	1.3243	R6M5K5	2723	BM35

3 Approximate Comparison Table High-Speed Tool Steels

China	Japan	South Korea	International Organization for Standardization	Germany
GB	JIS	KS	ISO	DIN EN/DIN
W6Mo5Cr4V2Co5	SKH55	SKH55	HS6-5-2-5	HS6-5-2-5

4 Approximate Comparison Table High-Speed Steel 2

China

Taiwan, China

Japan

South Korea

United States

International Organization for Standardization

Germany

France

Russia

Sweden

United Kingdom

ISC

CNS

JIS

ASTM

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

GOST

SS₁₄

BS EN/BS

W6Mo5Cr4V2Co5

T76545

SKH55

M36

T11336

HS 6-5-2-5

S 6-5-2-5

1.3243

HS 6-5-2-5

Р6М5К5

2723

HS 6-5-2-5

5 Approximate Comparison Table High-Speed Steel 4

China	Japan	South Korea	United States	Germany		France	European Standard		Russia	Sweden	United Kingdom
GB	JIS	KS	UNS	DIN EN/DIN	W-Nr.	NF EN/NF	EN	Numerical Grade	GOST	SS₁₄	BS EN/BS
W6Mo5Cr4V2Co5	SKH55	SKH55	T11341	S 6-5-2-5 HS 6-5-2-5 S 6-5-2-5S	1.3243	06-05-05-04-02 HS 6-5-2-5 HS 6-5-2-5HC HS 6-5-2HC Z85WDKCV Z90WDKCV	HS 6-5-2-5	1.3243	Р6М5К5 R6M5K5	2723 2733	3243 BM35

SKH55 Corresponding Standards(Same grade name, different standards)

1	JIS G 4403-2005
	SKH 55
2	JIS G 4403-2022
	SKH 55

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!