Astm 4140 Steel Coil Plays A Key Role In Heavy Machinery - China

1 - ASTM 4140 steel coil characteristics and compatibility with heavy machinery

Core advantages:

- Balance of high strength and toughness: After quenching and tempering, the tensile strength reaches 850-1000 MPa, and the yield strength is ≥650 MPa, which is suitable for bearing impact and alternating loads.

- Excellent hardenability: The critical diameter of oil quenching is about 80mm (semi-martensitic hardness), and the performance of large-section parts is uniform.

- Fatigue and wear resistance: The chromium-molybdenum alloy component improves wear resistance and extends the life of components.

2 - Key applications of ASTM 4140 steel coil in heavy machinery

(1) Engineering machinery

- **Hydraulic rods and piston rods**:

- Need to withstand high pressure and reciprocating friction.

After quenching and tempering, the surface of ASTM 4140 steel coil is hard chrome plated (hardness ≥60 HRC), and the service life exceeds 20, 000 hours.

(2) Mining equipment

- **Crusher main shaft**:

- When the diameter is >200mm, the core hardness can still be guaranteed to be >28 HRC to avoid the risk of fracture.

- **Gear transmission system**:

- The tooth surface hardness after carburizing and quenching is 58-62 HRC, which is used for large ball mill reducers.

3 - Future trends

Lightweight design:

- The high strength of ASTM 4140 steel coil can achieve thin-walled components (such as 15% weight reduction of excavator hydraulic cylinder).

Intelligent manufacturing:

- Combined with IoT sensors to monitor the stress state of 4140 steel components and realize predictive maintenance.

Summary

ASTM 4140 steel coil is an irreplaceable "skeletal material" in heavy machinery.

Its reliability, economy and process maturity make it the first choice for high-load components.

Reasonable heat treatment and surface modification can further release performance potential.

It is recommended to customize material selection based on specific working conditions.

Songshun specialized in Special Steel for almost 20 years.

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Company Contact:

• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

• Phone: 076985475596

• Address: 1st Floor, No. 1, Dongda Fourth Street, Shatou Community, Chang'an Town, Dongguan , Guangdong , China

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• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
  After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.
  
  Combined with experienced exporting team and professional technical knowledge, Songshun Steel offers both technical advice and support, as well as global professional steel solution and service.
  
  Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.
  
  Songshun specialized in Special Steel for almost 20 years.
  
  We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.
  
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