Q250HD

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China GB Q250HD 核电站用碳素钢和低合金钢钢板 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: Q250HD / Q250HD

Category	Grade	Standard	Region/Area	Standard Content
Metals	Q250HD	GB 30814	China	核电站用碳素钢和低合金钢钢板

Chemical composition(mass fraction)(wt.%) of the Q250HD

Element	Min	Max	Similar
Al	-	-	-
B	-	-	-
V	-	0.0200	-
Nb	-	0.0200	-
Cu	-	0.3000	-
Ni	-	0.3000	-
Cr	-	0.3000	-
Mo	-	0.1200	-
S	-	0.0200	-
P	-	0.0200	-
Mn	0.8500	1.2000	-
Si	0.1500	0.4000	-
Si	-	0.4000	-
C	-	0.2700	-
C	-	0.2500	-
C	-	0.2400	-
C	-	0.2200	-

Mechanical Properties of steel grade Q250HD

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)
527 (≥)	649 (≥)	44	32	43	Solution and Aging, Annealing, Ausaging, Q+T,etc	314

Physical Properties of steel grade Q250HD

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	-	-			0.32	-
355	856	-	42.3	311		-
679	-	41	23.2			223	342

Heat Treatment of steel grade Q250HD

Heat treated : 1487°C - 1715°C

Technological Curves of steel grade Q250HD

No Curve

Cross Reference Table (Equivalent Grade) of Q250HD

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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