Alloy Steel Bar SAE8620 4140 4145h Forged/Hot Rolled Steel

• Type: Round
• Standard: AISI, ASTM, DIN, JIS
• Composition: Ferrous Steel Scrap
• Technique: Hot Rolled or Forged Steel Bar
• Shape: Bar
• Surface Treatment: Black or Rough Machining
• Model NO.: alloy steel bar
• Special Use: Cold Heading Steel, Mold Steel
• Application: Structural Steel Bar
• Supply Condition: Hot Rolled or Forged Steel Bar
• Grade: Alloy Steel Bar
• Surface: Bright or Black Steel Bar
• Main Grade: SAE8620 4140 4150 4340
• 4140 Steel Bar: 1000ton Stock
• Transport Package: Seaworthy Packaging
• Specification: diameter: 16-800mm
• Trademark: dajin
• Origin: China
• Production Capacity: 2000

Product Description

SAE8620 Alloy steel round bars
alloy steel bar SAE8620 4140 4340 Forged & hot rolled steel 

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 8617.
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

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

SAE8620 alloy steel round bar,alloy steel bars,hot rolled alloy steel bar,SAE8620 alloy steel round bar,alloy steel bars,hot rolled alloy steel bar,
SAE8620 alloy steel round bar,alloy steel bars,hot rolled alloy steel bar,

Our steel bar factory and lab



Our client and company info