4Cr5MoSiV1 T23440 - GB /T 1299-2025

Grade	4Cr5MoSiV1
China ISC	T23440
Corresponding Standard	GB /T 1299-2025 Tool and Mould Steels
Classification	Tool Steel

4Cr5MoSiV1 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Cu	Mo	V	More
Minimum Value	0.32	0.8	0.2	-	-	4.75	-	1.1	0.8	Cu+Ni≤0.55
Maximum Value	0.45	1.2	0.5	0.025	0.02	5.5	0.25	1.75	1.2	Cu+Ni≤0.55

• Smelting method: Vacuum degassing

4Cr5MoSiV1 Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
Delivery condition	Annealing	≤229
Specimen	Preheat to 790 ± 15 ℃, 1010℃(controllable atmosphere) ± 6℃ or Heat at 1000℃(salt bath), hold for 5 to 15 min, oil cooling. Temper at 550 ±6 ℃ twice, each time for 2 h	①

New and Old Grade Replacement List

Corresponding Standard	Grade
GB /T 1299-2014	Grade China ISC Other Name
GB /T 1299-2025	Grade China ISC

1 Approximate Comparison Table Hot Work Tool Steel

China		Japan	United States	International Organization for Standardization
GB	ISC	JIS	ASTM	ISO
4Cr5MoSiV1	T23353 (T20502)	SKD 61	H13	X40CrMoV 5-1

2 Approximate Comparison Table Alloy Tool Steel

China	Japan	South Korea	United States	International Organization for Standardization	Germany	United Kingdom
GB	JIS	KS	ASTM/AISI	ISO	DIN EN/DIN	BS EN/BS
4Cr5MoSiV1	SKD61	STD61	H13	40CrMoV5	X40CrMoV5-1	BH13

3 Approximate Comparison Table Alloy Tool Steel 2

China	Japan	United States	Germany		Russia	United Kingdom
GB	JIS	ASTM	DIN EN/DIN	W-Nr.	GOST	BS EN/BS
4Cr5MoSiV1	SK D61	H13	X40CrMoV5-1	1.2344	4Х5МФ1С	BH13

4 Approximate Comparison Table Alloy Tool Steel 3

China

Japan

South Korea

United States

Germany

France

European Standard

Russia

Sweden

United Kingdom

JIS

ASTM/AISI

UNS

DIN EN/DIN

W-Nr.

NF EN/NF

Numerical Grade

GOST

SS₁₄

BS EN/BS

4Cr5MoSiV1
SM4Cr5MoSiV1

SKD61

STD61

H13

T20813
T20811

Х40CrMoV5-1

1.2344

Z40CDV5
Х40CrMoV5

X40CrMoV5-1
X40CrMoV5-1-1

1.2344

4Х5МФ1С
4KH5MF1S

2214
2242

2344
BH13

4Cr5MoSiV1 Corresponding Standards(Same grade name, different standards)

1	GB /T 1299-2014
	4Cr5MoSiV1 T23353 T20502
2	YB /T 095-2015
	4Cr5MoSiV1
3	GB /T 1299-2025
	4Cr5MoSiV1 T23440

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