Grade X70

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China Q/SY GradeX70 西气东输管道工程制管用热轧板卷技术条件 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: GradeX70 / Grade X70

Category	Grade	Standard	Region/Area	Standard Content
Metals	Grade X70	Q/SY XQ 12	China	西气东输管道工程制管用热轧板卷技术条件

Chemical composition(mass fraction)(wt.%) of the Grade X70

Element	Min	Max	Similar
Ni+Cr+Cu	-	0.5000	-
V+Nb+Ti	-	0.1500	-
Pcm	-	0.2100	-
Ceq	-	0.4200	-
Ni	-	0.3000	-
Mo	-	0.3000	-
Ge	-	0.2500	-
Cu	-	0.3000	-
N	-	0.0100	-
Al	-	0.0600	-
Ti	-	0.0250	-
V	-	0.0600	-
Nb	-	0.0800	-
Si	-	0.3500	-
S	-	0.0050	-
P	-	0.0200	-
Mn	-	1.6500	-
C	-	0.0900	-
Pcm	-	0.2100	-
Ceq	-	0.4200	-
Ni	-	0.3000	-
Mo	-	0.3000	-
Ge	-	0.2500	-
Cu	-	0.3000	-
N	-	0.0100	-
Al	-	0.0600	-
Ti	-	0.0250	-
V	-	0.0600	-
Nb	-	0.0800	-
Si	-	0.3000	-
S	-	0.0040	-
P	-	0.0180	-
Mn	-	1.6000	-
C	-	0.0900	-

Mechanical Properties of steel grade Grade X70

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)
327 (≥)	598 (≥)	43	42	23	Solution and Aging, Annealing, Ausaging, Q+T,etc	434

Physical Properties of steel grade Grade X70

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
22	-	-			0.14	-
145	639	-	34.3	123		-
762	-	21	22.2			132	341

Heat Treatment of steel grade Grade X70

Heat treated : 1736°C - 1285°C

Technological Curves of steel grade Grade X70

No Curve

Cross Reference Table (Equivalent Grade) of Grade X70

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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