Qt Heat Treament 42CrMo SAE4140 SAE8620 4145h Alloy Steel Bar

China Qt Heat Treament 42CrMo SAE4140 SAE8620 4145h Alloy Steel Bar, Find details about China Alloy Steel Bar, 4145h Steel Bar from Qt Heat Treament 42CrMo SAE4140 SAE8620 4145h Alloy Steel Bar

Basic Info.

Model NO.

alloy steel bar

Special Use

Cold Heading Steel, Mold Steel

Application

Structural Steel Bar

Grade

Alloy Steel Bar

Material

SAE8620 4140 4150 42CrMo Sc440 42CrMo4

Hot Rolled Steel Bar

Forged Steel Bar

Cold Drawn Steel Bar

Bright Steel Ar

Ready Stock

Yes

Trademark

dajin

Transport Package

Anti-Rust Pacakging

Specification

5-800mm

Origin

China

Model NO.

alloy steel bar

Special Use

Cold Heading Steel, Mold Steel

Application

Structural Steel Bar

Grade

Alloy Steel Bar

Material

SAE8620 4140 4150 42CrMo Sc440 42CrMo4

Hot Rolled Steel Bar

Forged Steel Bar

Cold Drawn Steel Bar

Bright Steel Ar

Ready Stock

Yes

Trademark

dajin

Transport Package

Anti-Rust Pacakging

Specification

5-800mm

Origin

China

Product Desciption

42CrMo SAE4140 SAE8620 alloy steel bar QT heat treament

GENERAL CHARACTERISTICS OF ALLOY STEEL 8620
Alloy steel 8620 is a case-hardening steel containing nickel, chromium and molybdenum as alloying elements. The alloy shows good strength and toughness properties, and has a higher core strength than grades 8615 and 20CrNiMo.
8620 alloy steel bar chemical composition

Grade	C	Si	Mn	P	S	Cr	Ni	Mo
8620	0.18-0.23	0.15-0.35	0.70-0.90	Max 0.035	Max 0.035	0.40-0.60	0.40-0.70	0.15-0.25

Qt Heat Treament 42CrMo SAE4140 SAE8620 4145h Alloy Steel Bar

8620 alloy steel bar Mechanical Property:
Grade:ASTM A29 SAE 8620 SNCM220
Hardness:197HB
Tensile strength:980(100)MPA
Yield strength: 785(180)MPA
elogation:9% Reduction of area:40% AKV(impact value):47J

8620 alloy steel bar applications
This alloy may be used in the production of medium-strength parts such as forged camshafts, fasteners and gears.
8620 Alloy steel bar HEAT TREATMENT
Annealing:For optimum machinabilty, an as-forged structure is normally sufficient for this grade of alloy steel. If this proves not to be the case then an iso-anneal from around 1650ºF (900ºC) to 1225ºF (660ºC) will improve machinability.
Normalizing:1675ºF (910ºC) and air cool. This is another method of improving machinability in this grade; normalizing might also be used prior to case hardening.
Hardening:The alloy will be austenitized at around 1525ºF (830ºC) and oil or water quenched depending upon section size and intricacy.
Tempering:to desired hardness, using temperatures based on past experience, following water or oil quench.
Machinability:This grade of alloy is readily machined following suitable cooling from forging or subsequent heat treatment.
Other grade of alloy steel bar we can supply

	Steel grades	C	Si	Mn	Cr	Mo	Ni	P	S
Carbon Structure Steel	Q235(B)/SS400/S235JR/A36	≤ 0.20	≤0.35	≤1.4	0.3-0.4		≤0.30	≤ 0.045	≤ 0.045
	20#/CK22, CK20/1020/050A20/S20C	0.17-0.23	0.17-0.37	0.35-0.65	0.3-0.4		≤0.30	≤ 0.035	≤ 0.035
	45#/CK45, C45/1045/080M46/S45C	0.42-0.5	0.17-0..37	0.5-0.8	0.3-0.4		≤0.30	≤ 0.035	≤ 0.035
Alloy Structure Steel	20Cr/20Cr4/5120/527A19/SCr420H	0.18-0.24	0.17-0.37	0.50-0.80	0.70-1.00	≤0.15	≤0.30	≤ 0.035	≤ 0.035
	40Cr/41Cr4/5140/520M40/SCr440	0.37-0.44	0.17-0.37	0.5-0.8	0.8-1.1	≤0.15	≤0.30	≤ 0.035	≤ 0.035
	30CrMo/4130/1717COS110/SCM420	0.26-0.34	0.17-0.37	0.4-0.7	0.8-1.1	0.15-0.25	≤0.30	≤ 0.035	≤ 0.035
	35CrMo/34CrMo4/4135/708A37	0.32-0.40	0.17-0.37	0.4-0.7	0.8-1.1	0.15-0.25	≤0.30	≤ 0.035	≤ 0.035
	42CrMo/42CrMo4/4140/708A42/708M40	0.38-0.45	0.17-0.37	0.5-0.8	0.90-1.2	0.15-0.25	≤0.30	≤ 0.035	≤ 0.035
	8620H	0.17-0.23	0.15-0.35	0.65-0.95	0.35-0.65	0.15-0.25	0.35-0.75	≤0.025	≤ 0.035
	40CrNiMoA/40CrNiMo22/4340/871M40/SNCM439	0.37-0.44	0.17-0.37	0.50-0.80	0.60-0.90	0.15-0.25	1.25-1.65	≤ 0.025	≤ 0.025
Spring Steel	55Si2Mn/55Si7/9255/250A53/SUP6	0.52-0.60	1.50-2.00	0.60-0.90	≤0.35		≤0.35	≤ 0.035	≤ 0.035
	60Si2MnA/65Si7/9260/250A61/SUP7	0.56-0.64	1.60-2.00	0.70-1.00	0.3-0.4		≤0.35	≤ 0.025	≤ 0.025
	50CrVA/50CrVA/6150/735A50/SUP10	0.47-0.54	0.17-0.37	0.50-0.80	0.80-1.10	≤0.15	≤0.30	≤ 0.025	≤ 0.025
	GCr15/100Cr6/E52100/534A99/SUJ2	0.95-1.05	0.15-0.35	0.25-0.45	1.40-1.65	≤0.10	≤0.30	≤ 0.025	≤ 0.025
Bearing Steel	52100	0.93-1.05	0.15-0.35	0.25-0.45	1.35-1.60	≤0.10	≤0.25	≤ 0.025	≤ 0.015

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Qt Heat Treament 42CrMo SAE4140 SAE8620 4145h Alloy Steel Bar