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25 Application:China structural steel and alloy steel
Category Type Steel grade Standard Country
Grades Special Alloy 25 GBT China

Chemical composition % of the ladle analysis of grade 25

C(％) Si(％) Mn(％) P(％) S(％) Cr(％) Ni(％) Cu(%)
0.22-0.29 0.17-0.37 0.50-0.80 0.035 0.035 0.25 0.3 0.25
25
Mechanical properties of grade 25
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)
484 (≥) 165 (≥) 21 23 22 Solution and Aging, Annealing, Ausaging, Q+T,etc 433
Physical properties of grade 25
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
333 (≥) 614 (≥) 23 11 31 Solution and Aging, Annealing, Ausaging, Q+T,etc 233
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
943 849 143
25 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
0Cr25Ni20 GBT China
Oxidation resistance is better than 0cr23ni13. Mostly used as heat resistant steel
A-29 1025 GBT China
General use carbon steel rod
1025 GBT China
These products have been used typically for use in fabrication of fittings, but usage is not limited to such applications. These products are not typically used for deep forming or cupping operations.
G10250 GBT China
General use carbon steel rod
G2500 GBT China
Used in the products of the automobile, truck, tractor, and allied industries; small cylinder blocks, cylinder heads, air cooled cylinders, pistons, clutch plates, oil pump bodies, transmission cases, gear boxes, clutch housings, and light-duty brake drum
G2500a GBT China
Used in the products of the automobile, truck, tractor, and allied industries
2Cr25Ni20 GBT China
Seamless stainless steel tubes for boiler and heat exchanger
0Cr15Ni25Ti2MoA1VB GBT China
Heat-resisting steel sheets and plates
1Cr25Ni20Si2 GBT China
Heat-resisting steel sheets and plates
2Cr25N GBT China
Heat-resisting steel sheets and plates
A 167 S31254 GBT China
Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip
A 213 S31254 GBT China
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
A 240 S31254 GBT China
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 249 S31254 GBT China
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A 269 S31254 GBT China
Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A 270 S31254 GBT China
Seamless and Welded Austenitic Stainless Steel Sanitary Tubing
A 276 S31254 GBT China
Stainless Steel Bars and Shapes
A 312 S31254 GBT China
Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
A 358 S31254 GBT China
Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
A 167 S31725 GBT China
Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

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