W7Mo4Cr4V2Co5 T77445 - GB /T 9943-2008

Grade	W7Mo4Cr4V2Co5
China ISC	T77445
Corresponding Standard	GB /T 9943-2008 High-Speed Tool Steels
Classification	Tool Steel

W7Mo4Cr4V2Co5 Chemical Element Composition Content (%)

Component	C	Si ^①	Mn	P	S ^②	Cr	Ni ^③	Cu ^③	Mo	W	V	Co
Minimum Value	1.05	0.15	0.2	-	-	3.75	-	-	3.25	6.25	1.75	4.75
Maximum Value	1.15	0.5	0.6	0.03	0.03	4.5	0.3	0.25	4.25	7	2.25	5.75

① The lower limit of silicon content in electro-slag steel is not specified.
② Upon the request of the buyer, to improve the machinability of the steel, the sulfur content may be specified as 0.06% to 0.15%.
③ Cu and Ni are residual contents.

W7Mo4Cr4V2Co5 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
Delivery condition	Annealing	≤269
sample	Quenching and Tempering	HRC ≥66

Notes:
① When the tempering temperature is 550 to 570°C, temper twice, each time for 1 hour; when the tempering temperature is 540 to 560°C, temper twice, each time for 2 hours; when the tempering temperature is 530 to 550°C, temper three times, each time for 2 hours.
② For annealed and cold-drawn condition, the hardness may be allowed to increase by 50 HBW over the annealed condition.

1 Approximate Comparison Table High-Speed Steel 1

China	Japan	United States	International Organization for Standardization	Germany		France	Russia
GB	JIS	ASTM	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	GOST
W7Mo4Cr4V2Co5	MH41	M41	HS7-4-2-5	S7-4-2-5	1.3246	Z110WKCDV07-05-04-04-04	Р6М5К5

2 Approximate Comparison Table High-Speed Steel 2

China		United States		International Organization for Standardization	Germany		France	United Kingdom
GB	ISC	ASTM	UNS	ISO	DIN EN/DIN	W-Nr.	NF EN/NF	BS EN/BS
W7Mo4Cr4V2Co5	T77445	M41	T11341	HS 7-4-2-5	S 7-4-2-5	1.3246	HS 7-4-2-5	HS 7-4-2-5 BM41

W7Mo4Cr4V2Co5 Corresponding Standards(Same grade name, different standards)

1	GB /T 9943-2008
	W7Mo4Cr4V2Co5 T77445
2	GB 9943-1988
	W7Mo4Cr4V2Co5

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