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Austenitic 661Application:China Taiwan Heat-Resistant Steel
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy Austenitic 661CNSChina

Chemical composition%of the ladle analysis of gradeAustenitic 661

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Mo(%)W(%)N(%)Co(%)Nb(%)
0.08-0.16Max 1.001.00-2.000.040.0320.0-22.519.0-21.02.50-3.502.00-3.000.10-0.2018.5-21.00.75-1.25
Austenitic 661
Mechanical properties of gradeAustenitic 661
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)
687(≥)519(≥)332431Solution and Aging,Annealing,Ausaging,Q+T,etc334
Physical properties of gradeAustenitic 661
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
383(≥)297(≥)342342Solution and Aging,Annealing,Ausaging,Q+T,etc141
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
251552942
Austenitic 661Range 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
Cross Reference Table(Equivalent Grade)
GradeStandardCountryApplication
SUH 661CNSChina
Heat-resisting steel bars and wire rods
SUH 661CNSChina
Heat-resisting steel plate, sheet and strip
STR661CNSChina
Heat - resisting steel plates and sheets
SUH661CNSChina
CNS standard heat resistant steel bar steel grade and chemical composition
SUH661CNSChina
CNS standard heat resistant steel plate of the steel grade and chemical composition

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