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G3 Application:Carbide for cutting tools
Category Type Steel grade Standard Country
Grades Special Alloy G3 JIS Japan

Chemical composition % of the ladle analysis of grade G3

W(%) Other(%)
88 Co+Ni:12
G3
Hardness quartile HRA:90.5
Bending strength frequency/MPa:1750
Mechanical properties of grade G3
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)
593 (≥) 771 (≥) 11 41 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 441
Physical properties of grade G3
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
234 (≥) 521 (≥) 13 43 42 Solution and Aging, Annealing, Ausaging, Q+T,etc 224
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
548 176 773
G3 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
G3000 JIS Japan
Cars and diesel engine cylinder block, cylinder head, flywheel and differential carrier medium castings, piston, brake hub and clutch plate
G3500 JIS Japan
Used in the products of the automobile, truck, tractor, and allied industries
G3500b JIS Japan
Diesel engine cylinder block, truck and tractor cylinder block and cylinder head, flywheel, tractor transmission case and heavy-load gear box
G3500c JIS Japan
Used in the products of the automobile, truck, tractor, and allied industries
G31410 JIS Japan
Steel for intake valves
G31400 JIS Japan
Steel for intake valves

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