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P 28

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Korea KS P28 Steel forgings and rolled or forged bars for pressure purposes-Technical delivery conditions-Part 4:Weldable fine grain steels with high proof strength and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: P28 / P 28
Category Grade Standard Region/Area Standard Content
Metals P 28 KS D ISO 9327-4 Korea Steel forgings and rolled or forged bars for pressure purposes-Technical delivery conditions-Part 4:Weldable fine grain steels with high proof strength

Chemical composition(mass fraction)(wt.%) of the P 28

Element Min Max Similar
C - 0.1800 -
Mn 0.5000 1.4000 -
P - 0.0350 -
S - 0.0300 -
Si 0.1000 0.4000 -
Ni - 0.3000 -
Cr - 0.3000 -
Mo - 0.0800 -
Cu - 0.3000 -
V - 0.0500 -
Ti - 0.0300 -
Al 0.0200 - -
N - 0.0200 -
Nb - 0.0500 -
Cr+Cu+Mo - 0.4500 -
Nb+Ti+V - 0.0500 -

Mechanical Properties of steel grade P 28

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)
925 (≥) 142 (≥) 13 24 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 122

Physical Properties of steel grade P 28

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
42 - -     0.21 -  
551 446 - 11.3 332   -  
352 - 33 13.2   432 111

Heat Treatment of steel grade P 28

Heat treated : 1877°C - 1872°C

Technological Curves of steel grade P 28

Cross Reference Table (Equivalent Grade) of P 28

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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