HERO STAR SPECIAL STEEL CO., LTD.

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SNCM220

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SNCM220

Model - SNCM220

Nickel chrome molybdenum alloy steel
Shafts, gears, pistons, auto parts, locomotive parts, various mechanical parts. Carburizing heat treatment will make the whole gear become super hard and tough, full of wear resistance, and can withstand high impact load

1.Ingredient:

Steel Grade	C	Si	Mn	P	S	Ni	Cr	Mo
SNCM220	0.17-0.23	0.15-0.35	0.60-0.90	<0.030	<0.030	0.40-0.70	0.40-0.65	0.15-0.30

2.Equivalent steel:

Equivalent steel	JIS	AISI	DIN	GB
	SNCM220	8620	21NiCrMo2	20CrNiMo

3.Heat treatment:

Normalization	Annealing	Quenching	Tempering
850-900 Air Cooling	850 Furnace Cooling	1st.850-900 Oil Cooling 2nd.800-850 Oil Cooling	150-200 Air Cooling

4.Mechanical properties:

Yielding Strength (kgf/mm²)	Tensile Strength (kgf/mm²)	Elongation (%)	Section reduction (%)	Charpy	Hardness (HBW)
	>85	>17	>40	>69	248~341

5.Origin Place:Japan,China,Korea

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SNCM220

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