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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
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV/Ku (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
767 (≥) 243 (≥) 24 42 12 Solution and Aging, Annealing, Ausaging, Q+T,etc 414

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 - -     0.13 -  
337 736 - 32.3 313   -  
327 - 34 41.2   112 122

Heat Treatment of steel grade Grade X70

Heat treated : 1169°C - 1348°C

Technological Curves of steel grade Grade X70

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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