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Z55CMN20-08Az Application:Steel Exhaust Valves

Category	Type	Steel grade	Standard	Country
Grades	Special Alloy	Z55CMN20-08Az	AFNOR	France

Chemical composition % of the ladle analysis of grade Z55CMN20-08Az

C(％)	Si(％)	Mn(％)	P(％)	S(％)	Cr(％)	Ni(％)	N(%)
0.50-0.60	Max 0.25	7.00-10.0	Max 0.040	Max 0.030	19.5-21.5	1.50-2.75	0.20-0.40

Z55CMN20-08Az

Mechanical properties of grade Z55CMN20-08Az

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)
934 (≥)	398 (≥)	34	21	12	Solution and Aging, Annealing, Ausaging, Q+T,etc	441

Physical properties of grade Z55CMN20-08Az

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
962 (≥)	814 (≥)	24	33	24	Solution and Aging, Annealing, Ausaging, Q+T,etc	124
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
476	852	464

Z55CMN20-08Az 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
Z55CMN20-08Az	AFNOR	France	Valve steels and alloys for internal combustion engines

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