China Factory Scm440 En19 4140 Forged Round Bar / AISI 4140 Forged Steel Round Bars

• Customization: Available
• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Model NO.: 4140 forged round bar
• Technique: Forged
• Application: Structural Steel Bar, Tool Steel Bar, Die Steel Bar
• Alloy: Alloy
• Special Use: Alloy Steel
• Delivery Condition: Forged / Forged+Rough Turned
• Heat Treatment: Annealed, Normalized, Qt
• MOQ: One Piece
• Grades: SAE 4140 En19 42CrMo4
• Transport Package: Standard Sea Worthy
• Specification: 200-1000mm
• Origin: China
• Production Capacity: 3000tons/Month

Product Description

China Factory scm440 EN19 4140 Forged Round Bar / AISI 4140 Forged Steel Round Bars

1.4140 forged steel bar sizes we can offer;
Round bar: 200-1200mm
Square bar:150×150-800 x 800mm

2.4140 Forged Steel round bar tolerance:
Black surface
Forged sizes up to 500mm (-0/+5mm)
Forged sizes above 500mm in diameter (-0/+8mm)
Machined surface to all sizes (-0/+3mm)

3.4140 Steel Equivalent

Standard	AISI / SAE 4140
UNS	-
WERKSTOFF NR.	41CrMo4, 42CrMo4, 42CrMoS4, 43CrMo4
BS 970	708M40, 708A42, 709M40, En19, En19C
UNI	41CrMo4, 38CrMo4 (KB), G40 CrMo4, 42CrMo4
JIS	SCM 440, SCM 440H, SNB 7, SCM 4M, SCM 4
EN name	42CrMo4
EN #	1.7223, 1.7225, 1.7227, 1.3563

4.4140 Forged steel chemical composition

Standard	Grade	C	Si	Mn	P	S	Cr	Mo
ASTM A29	4140	0.38-0.43	0.15-0.35	0.75-1.00	≤ 0.035	≤ 0.04	0.8-1.1	0.15-0.25
	42CrMo4	0.38-0.45	≤ 0.4	0.6-0.90	≤ 0.025	≤ 0.035	0.9-1.2	0.15-0.30
EN10083	1.7225
JIS G4105	SCM440	0.38-0.43	0.15-0.35	0.6-0.85	≤ 0.035	≤ 0.04	0.9-1.2	0.15-0.30
GB 3077	42CrMo	0.38-0.45	0.17-0.37	0.5-0.80	≤ 0.035	≤ 0.035	0.9-1.2	0.15-0.25
BS 970	EN19	0.35-0.45	0.15-0.35	0.5-0.80	≤ 0.035	≤ 0.035	0.9-1.5	0.2-0.40

5.4140 Steel Application
AISI 4140 steel finds many applications as forgings for the aerospace,oil and gas,automotive, agricultural and defense industries etc.
Typical applications for 4140 steel uses include:forged gears,spindles,fixtures,jigs,collars,Axles,conveyor parts,crow bars,logging parts,shafts,sprockets,studs,pinions,pump shafts, rams, and ring gears etc

6.Quality control:
1. Melting Process: EAF/BOF+LF+VD resulting in ingots
2. Both ends cut by saw
3. Ratio of forging:minimum 3:1
4. Grain size of final product: according to ASTM E112 more than 5,preferred more than 8
5. Ultrasonic test: As per SEP1921 Class C/c or D/d

7.Heat treatment of 4140 Steel 
Quenched and Tempered (+QT) of SAE 4140 Steel
1. Heat 4140 steel slowly to 840-875°C;
2. Soak at this temperature then quench in oil;
3. Temper as soon as AISI 4140 reach room temperature (20°C);
4. Heat uniformly to the suitable temperature of 560°C;
5. Withdraw the material from the furnace and cool in the air.                                                      
Annealing of AISI 4140 Alloy Steel
1. Heat the SAE 4140 slowly to 800-850°C and allow enough time.
2. Cool slowly in the furnace to 480°C followed by air cooling

8.MOQ: one piece per size/grade
9.Payment term: FOB CIF CFR EXW and so on
10.Delivery time : 7 to 30 days after deposit received.