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SUS 440B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 440B

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JIS SUS 440B

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This page is mainly introduced the SUS 440B chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of SUS 440B,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Stainless steel bars

Steel Garde:SUS 440B
Type:Stainless Steels
Country:Japan
Standard:JIS
Standard Number:

ITEM Standard Number Descriptions

1 G 4303 (2012) Stainless steel bars
Metallographic Structure:Martensite
Application:Stainless steel bars

ITEM	Standard Number	Descriptions
1	G 4303 (2012)	Stainless steel bars

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.75	0.95
Si		1.00
Mn		1.00
P		0.04
S		0.03
Cr	16.00	18.00
Ni		0.60
Mo		0.75
N

Mechanical Properties

Tensile strength	232～420	σb/MPa
Yield Strength	214	σ 0.2 ≥/MPa
Elongation	15	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	786～139	-
HRC	30	-

Physical Properties

Thermal expansion	73-21	e-6/K
Thermal conductivity	50-60	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	5098-1643	째C
Density	7810-4810	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)
SUS 440B Stainless Steels	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