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ASTM A335 GRADE P91Application:Seamless Ferritic Alloy Steel Pipe for High-Temperature Service
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy ASTM A335 GRADE P91ASTMUSA

Chemical composition%of the ladle analysis of gradeASTM A335 GRADE P91

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Mo(%)V(%)N(%)Nb(%)Al(%)Ti(%)
0.08-0.120.20-0.500.30-0.60Max 0.020Max 0.0108.00-9.50Max 0.40 0.85-1.050.18-0.250.03-0.070.06-0.10Max 0.02 Max 0.01
ASTM A335 GRADE P91
Seamless Ferritic Alloy Steel Pipe for High-Temperature Service
Mechanical properties of gradeASTM A335 GRADE P91
Proof strength
Rp0.2(MPa)
Tensile strength
Rm(MPa)
Impact energy
KV(J)
Elongation at fracture
A(%)
Reduction in cross section on fracture
Z(%)
As-Heat-Treated ConditionBrinell hardness(HBW)
946(≥)428(≥)214444Solution and Aging,Annealing,Ausaging,Q+T,etc313
Physical properties of gradeASTM A335 GRADE P91
PropertyDensity
kg/dm3
Temperature T
°C/F
Specific heat
J/kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
793(≥)163(≥)111322Solution and Aging,Annealing,Ausaging,Q+T,etc114
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
816134221
ASTM A335 GRADE P91Range of products
Product typeProductsDimensionProcessesDeliver Status
Plates/SheetsPlates/Sheets0.08-200mm(T)*W*LForging,hot rolling and cold rollingAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Steel BarRound Bar,Flat Bar,Square BarΦ8-1200mm*LForging,hot rolling and cold rolling,CastBlack,Rough Turning,Shot Blasting,
Coil/StripSteel Coil/Steel Strip0.03-16.0x1200mmCold-Rolled&Hot-RolledAnnealed,Solution and Aging,Q+T,ACID-WASHED,Shot Blasting
Pipes/TubesSeamless Pipes/Tubes,Welded Pipes/TubesOD:6-219mm x WT:0.5-20.0mmHot extrusion,Cold Drawn,WeldedAnnealed,Solution and Aging,Q+T,ACID-WASHED

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