| Customization: | Available |
|---|---|
| Type: | Alloy Steel Bar |
| Standard: | AISI, ASTM, GB, JIS, DIN, BS |
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Equivalent grades of EN19 round bars:
AISI 4140, SAE 4140, 42CrMo4, 42CrMoS4, Din 1.7225
EN19 Chemical Composition:
EN19 is European grade mainly from EN10083 and EN10250 standard,while EN19 is British grade from BS970-1955 standard.Although they are very close in chemical composition, they are different grades and can be considered eqnivalent grades.Through technical adjustments, we can adjust their components to the corresponding effective range in the table below, so that they can be used instead.
| 42CrMo4 | EN19 | Adjustment for EN19 and 42CrMo4 |
| C:0.38-0.45% | C:0.35-0.45% | C:0.38-0.45% |
| Si:≤ 0.4% | Si:0.10-0.35% | Si:0.15-0.35% |
| Mn:0.6-0.9% | Mn:0.5-0.8% | Mn:0.6-0.8% |
| Cr:0.9-1.2% | Cr:0.9-1.5% | Cr:0.9-1.2% |
| Mo:0.15-0.30% | Mo:0.2-0.40% | Mo:0.2-0.3% |
China/GB 3077:42CrMoA
USA/ASTM A29:4140/4142
Japan/JIS G4105:SCM440
Our Size Range Of 42CrMo4 Round Steel Bars:
16mm, 18mm, 20mm, 22mm, 23.5mm, 24mm, 25mm, 26mm, 27mm, 28mm, 30mm, 32mm, 34mm, 35mm, 36mm, 37mm, 38mm, 40mm, 42mm, 45mm, 46.5mm, 47mm, 50mm, 51mm,53mm, 56mm, 60mm, 63mm, 65mm, 70mm, 75mm, 78mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm, 125mm, 130mm.
Grades We Manufacture in addition to 42CrMo4 Round Bars:
MS, SAE 1018, IS 2062, A105, 1008, SAE 1010, SAE 1015, C15, C18, C20, 1020, C22, 1022, C25, 1025, C30, 1030, C35, 1035, 35C8, S35C, C40, 1040, C45, 45C8, 1045, CK45, C50, 1050, C55, 55C8, 1055, C60, 1060, C70, 41Cr4, 40Cr4, 40Cr1, En18, En18D, SAE 1541, SAE 1536, 37Mn2, 37C15, En15, SAE 1141, LF2, EN19, SAE 4140, 42CrMo4, EN24, EN31, SAE 52100, 20MnCr5, 8620, EN1A, EN8, EN8D, EN9, ST 52.3, EN42, En353, SS 410, SS 202, SS 304, SS 316 and other grades as per customer requirement.
Maybe you are also interested in below specification:
1.Supply Form & Size & Tolerance
Hot rolled bar:Φ6-Φ130mm,Length:3000-10000mm
Hot Forged round bar:Φ130-Φ1000mm,Length:3000-10000mm
Plate/Sheet:Thickness :20-400mm xWidth:80-1000mm,Length:2000-6000mm
Flat bar/Blcoks:Thickness :120-800mm xWidth:120-1500mm,Length:2000-6000mm
| Surface Finish | Black-Forged | Black-Rolled | Turned | Grinding | Polished | Peeled | Cold Drawn |
| Tolerance | (0,+5mm) | (0,+1mm) | (0,+3mm) | Best h9 | Best h11 | Best H11 | Best H11 |
2.Chemical Composition
| Grade | C | Si | Mn | Cr | Mo | P | S |
| 42CrMo4/1.7225 | 0.38-0.45 | ≤ 0.4 | 0.6-0.9 | 0.9-1.2 | 0.15-0.3 | ≤ 0.025 | ≤ 0.035 |
| 42CrMoS4/1.7227 | 0.38-0.45 | ≤ 0.4 | 0.6-0.9 | 0.9-1.2 | 0.15-0.3 | ≤ 0.025 | 0.02-0.04 |
3.Relevant Standards
| USA | UK | China | Japan | France | Russia |
| 4140 | EN19/708M40 | 42CrMo | SCM440 | 42CD4 | 42HM |
4. Mechanical Property
| Diameter d mm | ≤ 16 | 16-40 | 40-100 | 100-160 | 160-250 |
| Thickness t mm | < 8 | 8-20 | 20-60 | 60-100 | 100-160 |
| Yield Strength Mpa | ≥900 | ≥750 | ≥650 | ≥550 | ≥500 |
| Tensile Strength Mpa | 1100-1300 | 1000-1200 | 900-1100 | 800-950 | 750-900 |
| Elongation, % | ≥10 | ≥11 | ≥12 | ≥13 | ≥14 |
| Reduction of area ,% | ≥40 | ≥45 | ≥50 | ≥50 | ≥55 |
| impact | ≥30 | ≥35 | ≥35 | ≥35 | ≥35 |
5.Forging
42CrMo4 forging temperature:900 - 1100°C ,cooling as slowly as possible in still air or in sand after forged.
6.Heat Treatment
7.Surface Hardness
| NORMAL HARDENABILITY +H (850°C - hardness HRC - distance mm) | |||||||||||||||
| Distance mm | 1.5 | 3 | 5 | 7 | 9 | 11 | 13 | 15 | 20 | 25 | 30 | 35 | 40 | 45 | 50 |
| HRC Min | 53 | 53 | 52 | 51 | 49 | 43 | 40 | 37 | 34 | 32 | 31 | 30 | 30 | 29 | 29 |
| HRC Max | 61 | 61 | 61 | 60 | 60 | 59 | 59 | 58 | 56 | 53 | 51 | 48 | 47 | 46 | 45 |
8.Application
42CrMo4 has high strength and wear-resistance,widely used in many industries.
Components with high strength and toughness for tools, automotive parts,mechanical engineering, armament components,such as geer wheels,pinions,connecting rods,parts for mechanical engineering.
Statically and dynamically stressed components for vehicles, engines and machines. For parts of larger cross-sections, crankshafts,gears
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