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A268 29-4-2

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America ASTM A26829-4-2 一般设备用无缝和焊接铁素体与马氏体不锈钢管 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: A26829-4-2 / A268 29-4-2
Category Grade Standard Region/Area Standard Content
Metals A268 29-4-2 ASTM A268/A268M America 一般设备用无缝和焊接铁素体与马氏体不锈钢管

Chemical composition(mass fraction)(wt.%) of the A268 29-4-2

Element Min Max Similar
N - 0.0200 -
Cu - 0.1500 -
Mo 3.5000 4.2000 -
Ni 2.0000 2.5000 -
Cr 28.0000 30.0000 -
P - 0.0250 -
S - 0.0200 -
Mn - 0.3000 -
Si - 0.2000 -
C - 0.0100 -
Si - 0.2000 -
S - 0.0200 -
P - 0.0250 -
Ni 2.0000 2.5000 -
N+C - 0.0250 -
N - 0.0200 -
Mo 3.5000 4.2000 -
Mn - 0.3000 -
Cu - 0.1500 -
Cr 28.0000 30.0000 -
C - 0.0100 -

Mechanical Properties of steel grade A268 29-4-2

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)
252 (≥) 178 (≥) 31 22 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical Properties of steel grade A268 29-4-2

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
43 - -     0.32 -  
771 886 - 11.3 411   -  
156 - 42 43.2   133 214

Heat Treatment of steel grade A268 29-4-2

Heat treated : 1322°C - 1341°C

Technological Curves of steel grade A268 29-4-2

Cross Reference Table (Equivalent Grade) of A268 29-4-2

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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