ML37CrB A20378 - GB T 6478-2001

Grade	ML37CrB
China ISC	A20378
Corresponding Standard	GB T 6478-2001 Steels for cold heading and cold extruding
Classification	Alloy Steel

ML37CrB Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni ^*	Cu ^*	B	Al ^ⓐ
Minimum Value	0.34	-	0.5	-	-	0.2	-	-	0.0005	0.02
Maximum Value	0.41	0.4	0.8	0.035	0.035	0.4	0.2	0.2	0.0035	-

①By agreement between the supplier and the purchaser, other grades of cold heading and cold extrusion steel may be supplied.
②Permissible deviations in the chemical composition of the steel shall comply with the relevant provisions of GB/T 222-1984.

ML37CrB Mechanical Properties

condition	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %
Steel	Annealing	≤600			≥60
Sample diameter d=25	Normalizing temperature 855~885°C, Quenching temperature 835~875°C water or oil cooling, Tempering temperature 550~660°C	≥750	≥600	≥12

Approximate Comparison Table Steel for Cold Heading and Cold Extrusion

China		International Organization for Standardization
GB	ISC	ISO
ML37CrB GB/T 6478-2015	A20374	37CrB1E ISO 4954-1993

ML37CrB Corresponding Standards(Same grade name, different standards)

1	GB T 6478-2001
	ML37CrB A20378
2	GB /T 6478-2015
	ML37CrB A20374

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