4CrNi4Mo T27670 - GB /T 1299-2025

4CrNi4Mo Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
Minimum Value	0.4	0.1	0.2	-	-	1.2	3.8	-	0.15
Maximum Value	0.5	0.4	0.5	0.03	0.015	1.5	4.3	0.25	0.35

4CrNi4Mo Mechanical Properties

condition	Heat Treatment or Condition	Hardness HBW
Delivery condition	Annealing	≤285
Specimen	Heat at 850 ±10 ℃, oil cool, temper at 180 ±10 ℃	HRC: ≥52

New and Old Grade Replacement List

Approximate Comparison Table Hot Work Tool Steel

China		Japan	International Organization for Standardization
GB	ISC	JIS	ISO
4CrNi4Mo	T23504	SKT 6	45CrNiMo 1-6

4CrNi4Mo Corresponding Standards(Same grade name, different standards)

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