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SA-320 Grade L7B

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America ASME SA-320GradeL7B 低温用合金钢螺栓材料 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: SA-320GradeL7B / SA-320 Grade L7B
Category Grade Standard Region/Area Standard Content
Metals SA-320 Grade L7B ASME SA-320/SA-320M America 低温用合金钢螺栓材料

Chemical composition(mass fraction)(wt.%) of the SA-320 Grade L7B

Element Min Max Similar
Si 0.1500 0.3500 -
S - 0.0400 -
P - 0.0350 -
Mo 0.1500 0.2500 -
Mn 0.7000 0.9000 -
Cr 0.8000 1.1000 -
C 0.3500 0.4000 -

Mechanical Properties of steel grade SA-320 Grade L7B

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)
974 (≥) 716 (≥) 34 43 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 421

Physical Properties of steel grade SA-320 Grade L7B

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
33 - -     0.33 -  
848 131 - 11.3 232   -  
251 - 14 14.2   124 143

Heat Treatment of steel grade SA-320 Grade L7B

Heat treated : 1158°C - 1197°C

Technological Curves of steel grade SA-320 Grade L7B

Cross Reference Table (Equivalent Grade) of SA-320 Grade L7B

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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