Forged Steel Bar 42CrMo4+QT Forged and rough turned steel round bar
1. 42CrMo4 forged steel bar sizes we can offer;
Round bar: 200-1000mm
Square bar:150×150-600×600mm
2.Supply condition for 42CrMo4 Forged steel bars:Black /Rough Machined /Rough turned
3.Futhur heat treatment for 42CrMo4 forged steel :
Normalized
Annealed
Q&T(Quenched&Tempered)
4. 42CrMo4Forged 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. 42CrMo4 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 |
6. 42CrMo4 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 |
7. 42CrMo4 Steel Application
42CrMo4 steel finds many applications as forgings for the aerospace,oil and gas,automotive, agricultural and defense industries etc.
Typical applications for Scm440 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 Steel
Quenched and Tempered (+QT) of 42CrMo4 Steel
1. Heat 42CrMo4 steel slowly to 840-875°C;
2. Soak at this temperature then quench in oil;
3. Temper as soon as 42CrMo4 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 42CrMo4 Alloy Steel
1. Heat the 42CrMo4 slowly 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.
Forged Steel Bar 42CrMo4+QT Forged and rough turned steel round bar
Forged Steel Bar 42CrMo4+QT Forged and rough turned steel round barForged Steel Bar 42CrMo4+QT Forged and rough turned steel round bar
Audited Supplier 
){kind=link}