STKR490

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China 宝钢Q/BQB STKR490 一般结构用方、矩形焊管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: STKR490 / STKR490

Category	Grade	Standard	Region/Area	Standard Content
Metals	STKR490	Q/BQB 291	China	一般结构用方、矩形焊管

Chemical composition(mass fraction)(wt.%) of the STKR490

Element	Min	Max	Similar
S	-	0.0300	-
P	-	0.0300	-
Mn	-	1.5000	-
Si	-	0.5500	-
C	-	0.1800	-

Mechanical Properties of steel grade STKR490

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
461 (≥)	965 (≥)	33	14	23	Solution and Aging, Annealing, Ausaging, Q+T,etc	344

Physical Properties of steel grade STKR490

Temperature (°C)	Modulus of elasticity (GPa)	Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and	Thermal conductivity (W/m·°C)	Specific thermal capacity (J/kg·°C)	Specific electrical resistivity (Ω mm²/m)	Density (kg/dm³)	Poisson’s coefficient, ν
32	-	-			0.23	-
489	317	-	34.3	131		-
543	-	13	22.2			133	433

Heat Treatment of steel grade STKR490

Heat treated : 1342°C - 1537°C

Technological Curves of steel grade STKR490

No Curve

Cross Reference Table (Equivalent Grade) of STKR490

Grade	Standard	Country	Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1

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