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C-8 Application:Machining with carbide

Category	Type	Steel grade	Standard	Country
Grades	Special Alloy	C-8	AISI	USA

Chemical composition % of the ladle analysis of grade C-8

W(%)	Co(%)	Ti(%)	Ta(%)
62.0-82.0	4.4-8.0	10.4-18.0	2.0-12.0

C-8

Density / (g/cm ^ 3) : 9.8 ~ 11.9

Hardness HRA: 92.0 ~ 93.0

Bending strength/MPa: 1035 ~ 1585

Use for example: used for steel precision bore

Mechanical properties of grade C-8

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)
827 (≥)	825 (≥)	41	14	22	Solution and Aging, Annealing, Ausaging, Q+T,etc	334

Physical properties of grade C-8

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
457 (≥)	284 (≥)	32	33	21	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
423	643	229

C-8 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
HEV5	AISI	USA	Steel for exhaust valves
N07080	AISI	USA	Steel for exhaust valves

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