1.7035 41cr4 40h AISI 5140 SCR440 Alloy Carbon Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Ferrous Steel Scrap
• Technique: Forged
• Shape: Bar
• Surface Treatment: Black or as Required
• Model NO.: Round bar
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Tool Steel Bar
• Length: 2500-5500mm
• Transport Package: N/M
• Specification: 6-400mm
• Trademark: Smooth
• Origin: China
• HS Code: 7228400000
• Production Capacity: 5000ton/Month

Product Description

APPLICATION:

Steel susceptible to crankshafts, axles, gears, levers, connecting rods, connecting elements and grinding wheels

TECHNOLOGICAL INFORMATION:

After soft annealing steel becomes machinable ( by improved shearability) and adjusted for the mechanical cutting.

SEMI-FINISHED PRODUCTS:

After soft annealing steel becomes machinable ( by improved shearability) and adjusted for the mechanical cutting.

CHEMICAL COMPOSITION:

C	Mn	Si	P	S	Cr	Ni	Mo	V	W	Ti	Cu	Inne
0,38 - 0,45	0,60 - 0,90	Max 0,40	Max 0,025	Max 0,035	0,90 - 1,20	-	-	-	-	-	-	-

MECHANICAL PROPERTIES:

Effect of the cross-section on mechanical properties after heat treatment
Diameter d, mm Thickness of the flat bar t, mm	≤ 16 ≤ 8	16 - 40 8 - 20	40 - 100 20 - 60
Ultimate tensile strength Rm, MPa	1000 - 1200	900 - 1100	800 - 950
Yield stress Re (Rp0.2), MPa	≥ 800	≥ 660	≥ 560
Elongation, A, %	≥ 11	≥ 12	≥ 14
Reduction of area Z (%)	≥ 30	≥ 35	≥ 40
Impact energy, KV, J	≥ 30	≥ 35	≥ 35
Physical properties
Property		Unit	Value
Density, ρ		g·cm^-3	~7.85
Thermal expansion α0-50°C		K^-1	~11.3·10^-6
Thermal conductivity coefficient λ0°C		W·m^-1K^-1	~48.5

TECHNOLOGICAL TREATMENT PROCESSES:

Technological treatment processes			Possible application	Temperature, °C
Hot forming	Forging		+	(1050 - 850)
	Rolling		+	(1180 - 850)
Treatment	Heat treatment	Quenching	+	820-860/w,o
		Tempering	+	540 - 680
	Precipitation strengthening	Supersaturation	-	-
		Ageing	-	-
	Annealing	Normalising	+	(840 - 870)
		Soft annealing	+	(680 - 720)
Thermochemical treatment	Carburising		-	-
	Other		-	-

INTERNATIONAL STEEL GRADES:

ISO		European Union		Russia
41Cr4	ISO 683-1 1987	41Cr4	EN 10083-1 1996	~ 40Ch	GOST 4543 1971
US		Japan		China
~ 5140	ASTM A 322-91	~SCr 4	JIS G 4104 1979	~ 40Cr	GB 3077-88