ASTM 4140 Steel | 1.7225 | 42CrMo4 | 42CD4 | 2244 | SCM440 Oil and Gas industry Steel

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

AISI 4140 Data PDF Down

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

 

2. Supply Range of ASTM 4140 Alloy Steel

4140 Steel Round Bar: diameter 5mm – 400mm

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

4140 Steel Block: 210mm x 500-810mm

ASTM 4140 steel ROUND BAR

3. Chemical Composition of AISI 4140 Steel Material

 

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. ASTM 4140 alloy Steel Equivalent and Related Speciation
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 4140 Steel Material Mechanical Properties

 

Mechanical properties of   steel   42CrMo4 (1.7225)
 

Nominal diameter (mm): to 16 16 – 40 40 – 100 100 – 160 160 – 250 250 – 330 330 – 660
Rm – Tensile strength (MPa) (+QT) 1100-1300 1000-1200 900-1100 800-950 750-900 700 600
Nominal thickness (mm): 0.3 – 3
Rm – Tensile strength (MPa) (+A) 620
Rm – Tensile strength (MPa) (+AC) 630
Nominal thickness (mm): to 8 8 – 20 20 – 50 50 – 80
Rm – Tensile strength (MPa) (+QT) 1100 1000 900 800
Rm – Tensile strength (MPa) (+C) 720
Rm – Tensile strength (MPa) (+LC) 670

 

Nominal diameter(mm):   or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; to 16 16 – 40 40 – 100 100 – 160 160 – 330 330 – 660
Re – Upper yield strength or
Rp0.2 – 0.2% proof strength (MPa) (+QT)		 900 750 650 500-550 460-500 390
Nominal thickness(mm): 0.3 – 3
Rp0.2 0.2% proof strength (MPa) (+A) 480

 

KV – Impact energy (J) longitud., (+QT) +20°
30-35
KV – Impact energy (J) transverse, (+QT) +20°
22

 

Nominal thickness (mm): 0.3 – 3
A – Min. elongation Lo = 80 mm (%) (+A) 15
A – Min. elongation at fracture (%) transverse, (+QT) 10-14
A – Min. elongation at fracture (%) (+C) 4
A – Min. elongation at fracture (%) (+LC) 6

 

Nominal thickness (mm): to 16 16 – 40 40 – 100 100 – 160 160 – 250
A – Min. elongation Lo = 5,65 √ So (%) (+QT), round products 10 11 12 13 14

 

Nominal diameter (mm):     or for flat products thickness: to 8; 8-20; 20-60; 60-100; 100-160; to 16 16 – 40 40 – 100 100 – 160 160 – 250
Z – Reduction in cross section on fracture (%) (+QT) 40 45 50 50 55
Z – Reduction in cross section on fracture (%) (+AC) 57

 

  Brinell hardness   (HBW):   (+S) 255
  Brinell hardness   (HBW):   (+A) 241
  Vickers hardness  ( HV):   (+A) 195
  Vickers hardness  ( HV):   (+QT) 340 – 490
6. Forging of ASTM 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 4140 Alloy Steel
  • ASTM 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 ASTM 4140 Alloy Steel

/ ℃ tempering temperature: 205 ~ 649°C.

After tempering hardness HRC: 18-25 HRC.

8. Application of ASTM / AISI 4140 Alloy Steel

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 SAE 4140 Alloy Steel

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

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

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