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55 Application:China structural steel and alloy steel
Category Type Steel grade Standard Country
Grades Special Alloy 55 GBT China

Chemical composition % of the ladle analysis of grade 55

C(%) Si(%) Mn(%) P(%) S(%) Cr(%) Ni(%) Cu(%)
0.52-0.60 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.3 0.25
55
Mechanical properties of grade 55
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 Condition Brinell hardness (HBW)
752 (≥) 371 (≥) 42 14 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 113
Physical properties of grade 55
Property Density
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
346 (≥) 657 (≥) 21 24 21 Solution and Aging, Annealing, Ausaging, Q+T,etc 311
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
137 466 217
55 Range of products
Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED
Cross Reference Table(Equivalent Grade)
Grade Standard Country Application
A 1049 S32760 GBT China
Stainless Steel Forgings, Ferritic/Austenitic (Duplex), for Pressure Vessels and Related Components
A 240 S32760 GBT China
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 276 S32760 GBT China
Stainless Steel Bars and Shapes
A 314 S32760 GBT China
Stainless Steel Billets and Bars for Forging
A 473 S32760 GBT China
Stainless Steel Forgings
A 479 S32760 GBT China
Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
A 511 S32760 GBT China
Seamless Stainless Steel Mechanical Tubing
A 789 S32760 GBT China
Seamless and Welded Ferritic/Austenitic Stainless Steel Tubing for General Service
A 790 S32760 GBT China
Seamless and Welded Ferritic/Austenitic Stainless Steel Pipe
A 815 CRS32760 GBT China
Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
A 815 WPS32760 GBT China
Wrought Ferritic, Ferritic/Austenitic, and Martensitic Stainless Steel Piping Fittings
A 928 S32760 GBT China
Ferritic/Austenitic (Duplex) Stainless Steel Pipe Electric Fusion Welded with Addition of Filler Metal
A 959 S32760 GBT China
Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels
A 988 S32760 GBT China
Hot Isostatically-Pressed Stainless Steel Flanges, Fittings, Valves, and Parts for High Temperature Service
S32760 GBT China
Duplex (Austenitic-Ferritic) Chromium Nickel Molybdenum Copper Wolfram Nitrogen Stainless Steel
SA-240 S32760 GBT China
Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
SA-276 S32760 GBT China
Specification for Stainless Steel Bars and Shapes
SA-479 S32760 GBT China
Specification for Stainless Steel Bars and Shapes for Use in Boilers and Other Pressure Vessels
SA-789 S32760 GBT China
Specification for Seamless and Welded Ferritic /Austenitic Stainless Steel Tubing for General Service
SA-790 S32760 GBT China
Specification for Seamless and Welded Ferritic /Austenitic Stainless Steel Pipe

Relevant products

55 Equivalent Grade Stock

Steel grade Dimension Shape Unit Quantity Delivery state Query
1.2714 Hot-Work Mould Steel Flat Bar Stock(2019-09-03) Select 0 Select Enquiry
15-5PH Forgrd Flat Bar Select 0 Select Enquiry
1.2714 Stock list 2020-06-15 Select 0 Select Enquiry
1.2714 QT Bar Stock List 2020-06-15 Select 0 Select Enquiry

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