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40B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 40B

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GBT 40B

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40B Profile
40B Chemical composition
40B Mechanical Properties
40B Physical Properties
40B Heat treatment
40B Size Availability
40B Relevant products

Profile

This page is mainly introduced the 40B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of 40B,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
40B

Steel Garde:40B
Type:Special Alloy
Country:China
Standard:GBT
Application:China structural steel and alloy steel

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
AISI 440B	AISI	USA
ASTM 440B	ASTM	USA
SUS440B	JIS	Japan
STS440B	KS	Korea
STS440B	KS	Korea
CNS 440B	CNS	China
40BOL0	STAS/SR	Romania
40BCr10S	STAS/SR	Romania
40BCr10X	STAS/SR	Romania
40BCr10XS	STAS/SR	Romania
40BCr10q	STAS/SR	Romania
40BCr10CS	STAS/SR	Romania
40BCr10q	STAS/SR	Romania
40BCr10AT	STAS/SR	Romania
CNS 440B	CNS	China

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	634～779	σb/MPa
Yield Strength	372	σ 0.2 ≥/MPa
Elongation	08	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	825～786	-
HRC	30	-

Physical Properties

Thermal expansion	49-79	e-6/K
Thermal conductivity	21-39	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	3326-7527	째C
Density	9745-4316	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)
40B 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