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K273Application:Age hardening type iron base alloy
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy K273GBTChina

Chemical composition%of the ladle analysis of gradeK273

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Mo(%)W(%)N(%)B(%)Nb(%)Al(%)
0.75-0.900.30-1.004.50-6.00Max 0.04Max 0.0218.0-21.04.50-5.500.80-1.200.80-1.200.10-0.20Max 0.0050.65-0.85Max 0.05
K273
Mechanical properties of gradeK273
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)
579(≥)279(≥)212343Solution and Aging,Annealing,Ausaging,Q+T,etc441
Physical properties of gradeK273
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
527(≥)716(≥)424344Solution and Aging,Annealing,Ausaging,Q+T,etc414
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
675416191
K273Range 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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