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
4.4140 Forged steel chemical composition
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.
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.
