80 - Special Alloy - Special Steel

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80 Application:China structural steel and alloy steel
Category	Type	Steel grade	Standard	Country
Grades	Special Alloy	80	GBT	China

Chemical composition % of the ladle analysis of grade 80

C(％)	Si(％)	Mn(％)	P(％)	S(％)	Cr(％)	Ni(％)	Cu(%)
0.77-0.85	0.17-0.37	0.50-0.80	0.035	0.035	0.25	0.3	0.25

Mechanical properties of grade 80
Proof strength R_p0.2 (MPa)	Tensile strength R_m (MPa)	Impact energy KV (J)	Elongation at fracture A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
462 (≥)	581 (≥)	34	11	44	Solution and Aging, Annealing, Ausaging, Q+T,etc	431

Physical properties of grade 80
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
828 (≥)	324 (≥)	44	32	22	Solution and Aging, Annealing, Ausaging, Q+T,etc	324
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
577	231	533

80 Range of products
Product type	Products	Dimension	Processes	Deliver Status
Plates / Sheets	Plates / Sheets	0.08-200mm(T)WL	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
G1800	GBT	China	Used in the products of the automobile, truck, tractor, and allied industries. Miscellaneous soft iron castings (as cast or annealed) in which strength is not of primary consideration. Exhaust manifolds may be made of this grade of iron, alloyed or unallo
GH4180	GBT	China	Nickel-base superalloy
S21800	GBT	China	Austenitic Chromium Nickel Manganese Stainless Steel
S30803	GBT	China	Austenitic wire for metal inert gas welding. It is suitable for welding corrosion resistant 18/8 CrNi steels for devices, vessels and parts in chemical, pharmacy and cellulose industry for temperature up to 350°C. Welded material has oxidation resistance
S30880	GBT	China	Austenitic Chromium Nickel Stainless Steel Bare Filler Metal
A 240 S34800	GBT	China	Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
A 249 S34800	GBT	China	Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes
A 269 S34800	GBT	China	Seamless and Welded Austenitic Stainless Steel Tubing for General Service
A 276 S34800	GBT	China	Stainless Steel Bars and Shapes
A 314 S34800	GBT	China	Stainless Steel Billets and Bars for Forging
A 358 S34800	GBT	China	Electric-Fusion-Welded Austenitic Chromium-Nickel Stainless Steel Pipe for High-Temperature Service and General Applications
A 409 S34800	GBT	China	Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service
A 473 S34800	GBT	China	Stainless Steel Forgings
A 580 S34800	GBT	China	Stainless Steel Wire
A 632 S34800	GBT	China	Seamless and Welded Austenitic Stainless Steel Tubing (Small-Diameter) for General Service
A 813 S34800	GBT	China	Single- or Double-Welded Austenitic Stainless Steel Pipe
A 814 S34800	GBT	China	Cold-Worked Welded Austenitic Stainless Steel Pipe
A 965 S34800	GBT	China	Steel Forgings, Austenitic, for Pressure and High Temperature Parts
S34800	GBT	China	Austenitic Chromium Nickel Stainless Steel
SA-240 S34800	GBT	China	Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications