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BM4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of BM4

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BM4

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This page is mainly introduced the BM4 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of BM4,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.

Steel Garde:BM4
Type:Special Alloy
Country:UK
Application:Carbide for cutting tools

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
BM4		UK
BM42		UK
BM42		UK

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	378～396	σb/MPa
Yield Strength	770	σ 0.2 ≥/MPa
Elongation	90	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	192～089	-
HRC	30	-

Physical Properties

Thermal expansion	08-16	e-6/K
Thermal conductivity	27-24	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	7954-3439	째C
Density	3214-4596	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
BM4 Special Alloy	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk