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STKM20A chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STKM20A

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CNS STKM20A

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This page is mainly introduced the STKM20A chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of STKM20A,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
STKM20A

Steel Garde:STKM20A
Type:Special Alloy
Country:China
Standard:CNS
Application:China Taiwan Structural steel

Chemical composition(mass fraction)(wt.%)

Mechanical Properties

Tensile strength	818～968	σb/MPa
Yield Strength	461	σ 0.2 ≥/MPa
Elongation	59	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	834～259	-
HRC	30	-

Physical Properties

Thermal expansion	77-39	e-6/K
Thermal conductivity	32-28	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	8712-6777	째C
Density	7160-8751	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)
STKM20A 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