Home»Grades > Special Alloy > K438
K438Application:Age hardening type Nickel base alloy
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy K438GBTChina

Chemical composition%of the ladle analysis of gradeK438

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Mo(%)W(%)Co(%)B(%)Nb(%)Al(%)Ti(%)Ta(%)Other(%)
0.10-0.20Max 0.5Max 0.5Max 0.015Max 0.0115.5-16.5Balance1.50-2.002.40-2.808.00-9.00 0.005-0.0150.50-1.103.20-3.703.00-3.501.50-2.00Zr:0.05-0.15
K438
Mechanical properties of gradeK438
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)
435(≥)916(≥)332123Solution and Aging,Annealing,Ausaging,Q+T,etc312
Physical properties of gradeK438
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
814(≥)856(≥)224421Solution and Aging,Annealing,Ausaging,Q+T,etc223
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
486828694
K438Range 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

Enquiry