K491

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China GB K491 高温合金和金属间化合物高温材料的分类和牌号 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: K491 / K491

Category	Grade	Standard	Region/Area	Standard Content
Metals	K491	GB/T 14992	China	高温合金和金属间化合物高温材料的分类和牌号

Chemical composition(mass fraction)(wt.%) of the K491

Element	Min	Max	Similar
Fe	-	0.5000	-
Ti	5.0000	5.5000	-
Al	5.2500	5.7500	-
Mo	2.7500	3.2500	-
Co	9.5000	10.5000	-
Ni	-	-	-
Cr	9.5000	10.5000	-
C	-	0.0200	-
S	-	0.0100	-
P	-	0.0100	-
Mn	-	0.1000	-
Si	-	0.1000	-
Zr	-	0.0400	-
B	0.0800	0.1200	-
Mg	-	0.0050	-

Mechanical Properties of steel grade K491

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)
395 (≥)	985 (≥)	21	14	41	Solution and Aging, Annealing, Ausaging, Q+T,etc	313

Physical Properties of steel grade K491

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
12	-	-			0.21	-
275	935	-	31.3	142		-
157	-	42	33.2			411	144

Heat Treatment of steel grade K491

Heat treated : 1146°C - 1713°C

Technological Curves of steel grade K491

No Curve

Cross Reference Table (Equivalent Grade) of K491

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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