China SAE 4140 En19 42CrMo4 Forged Machined Steel Round Bars

SAE 4140 En19 42CrMo4 Forged And Machined Steel Round Bars
1.42crmo forged steel bar sizes we can offer;
Round bar: 200-1000mm
Square bar:150x150-600x600mm
2.Supply condition for 42crmo Forged steel bars:Black /Rough Machined /Rough turned/Quenched and tempered
3.Futhur heat treatment for 42crmo forged steel :
Normalized
Annealed
Q&T(Quenched&Tempered)
4.42crmo 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)
5.42crmo Steel Equivalent

StandardAISI / SAE 4140UNS-WERKSTOFF NR.41CrMo4, 42CrMo4, 42CrMoS4, 43CrMo4BS 970708M40, 708A42, 709M40, En19, En19CUNI41CrMo4, 38CrMo4 (KB), G40 CrMo4, 42CrMo4JISSCM 440, SCM 440H, SNB 7, SCM 4M, SCM 4EN name42CrMo4EN #1.7223, 1.7225, 1.7227, 1.3563

6.42crmo Forged steel chemical composition

StandardGradeCSiMnPSCrMoASTM A2941400.38-0.430.15-0.350.75-1.00≤ 0.035≤ 0.040.8-1.10.15-0.25 42CrMo40.38-0.45≤ 0.40.6-0.90≤ 0.025≤ 0.0350.9-1.20.15-0.30EN100831.7225JIS G4105SCM4400.38-0.430.15-0.350.6-0.85≤ 0.035≤ 0.040.9-1.20.15-0.30GB 307742CrMo0.38-0.450.17-0.370.5-0.80≤ 0.035≤ 0.0350.9-1.20.15-0.25BS 970EN190.35-0.450.15-0.350.5-0.80≤ 0.035≤ 0.0350.9-1.50.2-0.40

7.4140 Forged Steel Application
42crmo4/4140 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
8.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
9.Heat treatment of 42crmo4/4140 Steel
Quenched and Tempered (+QT) of EN19 Steel
1. Heat 42crmo steel slowly to 840-875°C;
2. Soak at this temperature then quench in oil;
3. Temper as soon as 42crmo 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 42crmo Alloy Steel
1. Heat the 42crmoslowly to 800-850°C and allow enough time.
2. Cool slowly in the furnace to 480°C followed by air cooling
10.MOQ: one piece per size/grade
11.Payment term: FOB CIF CFR EXW and so on
12.Delivery time : 7 to 30 days after deposit received.