AISI 4140 Steel / 42CrMo4 steel is a Alloy Structural Steel belong to ASTM A29/A29M Steel Grade standard. And AISI 4140 used in Oil and Gas industry and Large Machinery Strutural. What’s more, AISI 4140 Steel / 42CrMo4 steel China Supplier and factory Otai Special Steel Supply AISI 4140 steel in Round bar, Plate, Flat bar, Square, Forging Ring and others any shape. And provide cutting, sawing, milled, machining processing.

DOWNLOAD 4140 Steel Plate Stock List

4140 steel plate stock for immediate shipment

1. Supply Form of AISI 4140 Steel -ASTM A29/A29M Alloy Structural Steel

2. Supply Range of AISI 4140 Alloy Steel  / 42CrMo4 steel

AISI 4140 Steel Round Bar: diameter 5mm – 400mm

ASTM 4140 Steel Plate: thickness 5 –500mm x width 200– 2300mm

SAE 4140 Steel Block: 210mm x 500-810mm

 

3. Chemical Composition of AISI 4140 Steel Material  / 42CrMo4 steel

ASTM A29/A29M C Si Mn P S Cr Mo
4140/G41400 0.35～0.40 0.20～0.35 0.70～0.90 0.025 Max 0.025 Max 0.80～1.10 0.18～0.25
DIN 17220, EN 10083 C Si Mn P S Cr Mo
1.7225/42CrMo4 0.38～0.45 ≤0.40 0.60～0.90 0.035 Max 0.035 Max 0.90～1.20 0.15～0.30
GB/T 1229 C Si Mn P S Cr Mo
42CrMo 0.38～0.45 0.17～0.37 0.50～0.80 0.030 Max 0.030 Max 0.90～1.20 0.15～0.25
JIS G4105 C Si Mn P S Cr Mo
SCM440 0.38～0.43 0.15～0.35 0.60～0.85 0.030 Max 0.030 Max 0.90～1.20 0.15～0.30

4. AISI 4140 alloy Steel Equivalent and Related Speciation  / 42CrMo4 steel

USA German Japan China ISO
ASTM 29/A29M DIN 17350 JIS G4404 GB/T 1229 ISO 683/18
4140 1.7225/42CrMo4 SCM440 42CrMo 42CrMo4

5. ASTM AISI 4140 Steel Material Mechanical Properties

Hardness, Rockwell C: 22 HRC, Density: 7.85kg/m3

Tensile strength: 655 MPa .

Melting point: 1416°C

Thermal expansion: 12.2 µm/m°C (20-100 ºC)

Elastic modulus: 190-210 GPa (at 25 ºC ).

6. Forging of AISI 4140 Oil and Gas industry Steel material metal

Forging of 4140 steel should be carried out between 2200 and 1650 º F (1200 and 900 º C). The lower the finishing temperature from forging, the finer will be the grain size. This alloy steel should ideally not be forged below 1650 º F (900 º C) and should be slow cooled after forging in Oil or water.

7. Heat Treatment of SAE/AISI 4140 Alloy Steel  / 42CrMo4 steel

  • 4140 Steel Annealing

Slowly heat to 800～8500 ºC, keep enough time, ensure heat thoroughly. then cooling in furnace to 480 ºC, then cool in air. After annealing, the hardness 92 HBS Max.

  • AISI 4140 Steel Hardening & Quenching

4140 Steel is usually used at 18-22 HRc, If needs, AISI 4140 alloy steel can be hardened or Quenching by cold work. Quenching medium: oil

  • Tempering Of AISI 4140 Alloy Steel

/ ℃ tempering temperature: 205 ~ 649°C.

After tempering hardness HRC: 18-25 HRc.

8. Application of AISI 4140 Alloy Steel  / 42CrMo4 steel

AISI 4140 alloy steel used for Structural products. As below:

Oil and gas sector, like collets, connection rods, conveyor pins, stem assemblies, gears, Bearings

9. Quality Assured of AISI 4140 Alloy Steel  / 42CrMo4 steel

Quality assured by Our ISO 9001:2008 quality management system. Our all AISI 4140 steel all had by SEP 1921-84 ultrasonic inspection (UT Test). Quality Grade: E/e, D/d, C/c.

 

AISI 4140 Data PDF Down

 

If you have any AISI 4140 steel inquiry and question for Price, Application, hot treatment, please don’t hesitate contact us.

Email: Jack@otaisteel.com

Tel:  +86-769- 33232622

Fax:  +86-769-88705839