Alloy ASTM4140 Round Bar

↵Alloy ASTM4140 Round Bar

Alloy ASTM4140 Round Bar

 

• Chemical Composition

The chemical composition of ASTM 4140 round bar includes:

Carbon (C): 0.38 ~ 0.43%
Silicon (Si): 0.15 ~ 0.35%
Manganese (Mn): 0.75 ~ 1.00%
Sulfur (S): allow residual content of ≤ 0.040%
Phosphorus (P): allow residual content of ≤ 0.030%
Chromium (Cr): 0.80 ~ 1.10 per cent
Molybdenum (Mo): 0.15 ~ 0.25
Nickel (Ni): allow residual content of ≤ 0.030%
Copper (Cu): allow residual content of ≤ 0.030%

• Mechanical properties

Mechanical properties of ASTM4140 round bar include:

Tensile strength (σb): ≥ 1080 MPa
Yield strength (σs): ≥930 MPa
Elongation (δ5): ≥ 12%
Sectional shrinkage (ψ): ≥45
Impact work (Akv): ≥63 J
Hardness: ≤217 HB1
 

ASTM4140 Round Bar Products Application

Machinery manufacturing: for the manufacture of demanding bolts, screws, nuts and other fasteners
Automotive and construction machinery: used in the manufacture of large gears, supercharger drive gears, rear axle, connecting rods and spring clamps, etc.
Petroleum industry: used in the oil well below 2000 metres of deep drilling rod joints and salvage tools
Others: used in the manufacture of pressure vessel gears, large plastic moulds, etc.

 

ASTM4140 Round Bar Products Image

​

 

FAQ

Q: What is your delivery time?

A: For stocks, we could transport the goods to loading port within 3 days after we received your deposit
For production period, it usually takes about 7-15 days after receiving the deposit.

Q: Can you provide sample ?

A: We can provide the small samples in stock for free, as long as you contact us.

Q: What is your terms of payment?

A: 30% T/T as the upfront deposit, 70% before delivery. We will show you the photos of products and package before you pay the balance.

 

If you have more needs and questions about ASTM4140 Round Bar, please contact us!