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A691 Grade 91

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America ASTM A691Grade91 高温下高压装置用电熔焊碳素钢和合金钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A691Grade91 / A691 Grade 91
Category Grade Standard Region/Area Standard Content
Metals A691 Grade 91 ASTM A691 America 高温下高压装置用电熔焊碳素钢和合金钢管

Chemical composition(mass fraction)(wt.%) of the A691 Grade 91

Element Min Max Similar
Zr - 0.0100 -
V 0.1600 0.2700 -
Ti - 0.0100 -
Si 0.1800 0.5600 -
S - 0.0120 -
P - 0.0250 -
Other - - -
Ni - 0.4300 -
Nb 0.0500 0.1100 -
N 0.0250 0.0800 -
Mo 0.8000 1.1000 -
Mn 0.2500 0.6600 -
Cr 7.9000 9.6000 -
C 0.0600 0.1500 -
Al - 0.0200 -

Mechanical Properties of steel grade A691 Grade 91

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)
661 (≥) 753 (≥) 32 32 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 234

Physical Properties of steel grade A691 Grade 91

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 -  
937 445 - 33.3 314   -  
861 - 41 33.2   114 321

Heat Treatment of steel grade A691 Grade 91

Heat treated : 1694°C - 1413°C

Technological Curves of steel grade A691 Grade 91

Cross Reference Table (Equivalent Grade) of A691 Grade 91

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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