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GB 08F Details

08F Application:This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.

Category Type Grade Designations
Grades Structural Steel 08F China - GB , GB/T 699-1999 - This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.
GB 13237-1991 -
GB/T 13793-1992 -
GB 3206-1982 -
GB/T 711-2008 -
GB 3275-1991 -
GB 699-1988 -
GB 710-1991 -
GB 711-1988 -

Chemical composition(wt.%) of 08F grade: GB/T 699-1999

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.05 0.11
Si - 0.03
Mn 0.25 0.5
P - 0.035
S - 0.035
Cr - 0.1
Ni - 0.3
Cu - 0.25
Delivery status: hot or hot forging
This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.

ReL (MPa) Rm (MPa) Z (%) A5.65 (%) Heat treatment condition Technology Sampl
175(≥) 295(≥) 60(≥) 35(≥) Normalizing 930℃ Heat preservation≥30min AC Normalizing 25(Sampl size)

HBS: 131(≤)


Mechanical properties of grade 08F GB/T 699-1999

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)
851 (≥) 256 (≥) 21 11 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 242

Physical properties of grade 08F GB/T 699-1999

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
844 (≥) 796 (≥) 11 11 14 Solution and Aging, Annealing, Ausaging, Q+T,etc 222
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
527 541 619

08F - Form of Supply

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
08F GB China
This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.
U20082 GB China
This standard specifies the alloy steel, low alloy steel, alloy steel chemical composition relative to the provisions of the finished steel smelting chemical composition boundary limit allowable deviation, and gives the definition of related terms.
310S UNS USA
Chemical compositions of SAE wrought stainless steels
310S YB USA
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
A 167 Type 310S SAE USA
Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip
A 213 TP310S SAE USA
Seamless Ferritic and Austenitic Alloy-Steel Boiler, Superheater, and Heat-Exchanger Tubes
A 240 Type 310S SAE USA
Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 249 TP310S SAE USA
Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A 276 310S SAE USA
Stainless Steel Bars and Shapes
A 312 TP310S SAE USA
Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes
A 314 310S SAE USA
Stainless Steel Billets and Bars for Forging
A 358 310S SAE USA
Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
A 403 CR310S SAE USA
Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
A 403 WP 310S SAE USA
Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings
A 409 TP310S SAE USA
Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service
A 473 310S SAE USA
Stainless Steel Forgings

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