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55Application:China structural steel and alloy steel
CategoryTypeSteel gradeStandardCountry
Grades Special Alloy 55GBTChina

Chemical composition%of the ladle analysis of grade55

C(%)Si(%)Mn(%)P(%)S(%)Cr(%)Ni(%)Cu(%)
0.52-0.600.17-0.370.50-0.800.0350.0350.250.30.25
55
Mechanical properties of grade55
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)
939(≥)652(≥)114224Solution and Aging,Annealing,Ausaging,Q+T,etc234
Physical properties of grade55
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
721(≥)663(≥)112214Solution and Aging,Annealing,Ausaging,Q+T,etc142
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0)N/mm2
Creep rupture strength
(10000h)
(Rp1,0)N/mm2
571723999
55Range 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
A 1049 S32760GBTChina
Stainless Steel Forgings, Ferritic/Austenitic (Duplex), for Pressure Vessels and Related Components
A 240 S32760GBTChina
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 276 S32760GBTChina
Stainless Steel Bars and Shapes
A 314 S32760GBTChina
Stainless Steel Billets and Bars for Forging
A 473 S32760GBTChina
Stainless Steel Forgings
A 479 S32760GBTChina
Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
A 511 S32760GBTChina
Seamless Stainless Steel Mechanical Tubing
A 789 S32760GBTChina
Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
A 790 S32760GBTChina
Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
A 815 CRS32760GBTChina
Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
A 815 WPS32760GBTChina
Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
A 928 S32760GBTChina
Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
A 959 S32760GBTChina
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
A 988 S32760GBTChina
Hot Isostatically-Pressed Stainless Steel Flanges, Fittings, Valves, and Parts for High Temperature Service
S32760GBTChina
Duplex (Austenitic-Ferritic) Chromium Nickel Molybdenum Copper Wolfram Nitrogen Stainless Steel
SA-240 S32760GBTChina
Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
SA-276 S32760GBTChina
Specification for Stainless Steel Bars and Shapes
SA-479 S32760GBTChina
Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
SA-789 S32760GBTChina
Specification for Seamless and Welded Ferritic /Austenitic Stainless Steel Tubing for General Service
SA-790 S32760GBTChina
Specification for Seamless and Welded Ferritic /Austenitic Stainless Steel Pipe

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