ASTM A519 SAE4140 Seamless Alloy Steel Pipe (20mm-140mm) - High-Strength Industrial Tubing
ASTM A519 SAE4140 steel pipe is a high-performance medium-carbon chromium-molybdenum alloy seamless pipe, produced in strict accordance with the ASTM A519 standard. With an outer diameter ranging from 20mm to 140mm, this SAE4140 alloy steel pipe boasts excellent strength, toughness, hardenability and wear resistance, making it widely applied in mechanical engineering, automotive manufacturing, oil and gas drilling, aerospace and high-pressure equipment fields. As a professional foreign trade supplier, we provide high-quality ASTM A519 SAE4140 steel pipes with stable performance, precise dimensions and reliable quality, fully meeting the strict requirements of international industrial applications and export standards for ASTM A519 SAE4140 products.
Product Core Specifications
Our ASTM A519 SAE4140 steel pipe is made of high-purity SAE4140 alloy steel, a typical chromium-molybdenum low-alloy high-strength material that complies with ASTM A519 standard. The product covers an outer diameter of 20mm to 140mm, which can be customized according to customer needs, supporting small-batch and large-batch orders. This SAE4140 steel pipe is easy to process, weld and heat treat, and can be adjusted through quenching and tempering processes to meet the performance requirements of different working conditions for ASTM A519 products.
- Executive Standard: ASTM A519 (Seamless Carbon and Alloy Steel Mechanical Tubing)
- Material: SAE4140 (medium-carbon chromium-molybdenum alloy steel, UNS G41400, compliant with ASTM A519)
- Outer Diameter: 20mm - 140mm (customizable for special specifications of ASTM A519 SAE4140 steel pipe)
- Product Type: Seamless Alloy Steel Pipe (ASTM A519 SAE4140 grade)
- Core Features: High strength, good toughness, excellent hardenability, wear resistance, high-temperature resistance and good machinability (key advantages of SAE4140 under ASTM A519 standard)
- Application Fields: Mechanical gears, automotive transmission shafts, oil drilling tools, high-pressure hydraulic pipelines, aerospace components, mold manufacturing and other high-load, high-stress working scenarios suitable for ASTM A519 SAE4140 steel pipe
Chemical Composition of SAE4140 (ASTM A519 Standard)
The chemical composition of ASTM A519 SAE4140 steel pipe is strictly controlled in accordance with ASTM A519 international standards, ensuring the stability and comprehensiveness of SAE4140 product performance. The specific mass fraction is shown in the following table:
|
Chemical Element
|
Mass Fraction (%) (SAE4140, ASTM A519 Standard)
|
|
Carbon (C)
|
0.38 ~ 0.43
|
|
Silicon (Si)
|
0.15 ~ 0.35
|
|
Manganese (Mn)
|
0.75 ~ 1.00
|
|
Phosphorus (P)
|
≤ 0.035
|
|
Sulfur (S)
|
≤ 0.040
|
|
Chromium (Cr)
|
0.80 ~ 1.10
|
|
Molybdenum (Mo)
|
0.15 ~ 0.25
|
|
Nickel (Ni)
|
≤ 0.25
|
|
Copper (Cu)
|
≤ 0.30
|
Mechanical Properties of ASTM A519 SAE4140 Steel Pipe (After Quenching & Tempering)
After quenching and tempering treatment, the ASTM A519 SAE4140 steel pipe has excellent mechanical properties, which can meet the load-bearing requirements of various harsh working conditions for SAE4140 products under ASTM A519 standard. The specific indicators are as follows:
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Mechanical Index
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Specification (ASTM A519 Standard for SAE4140 Steel Pipe)
|
|
Tensile Strength (σb)
|
≥ 930 MPa (up to 1130 MPa after optimization for ASTM A519 SAE4140)
|
|
Yield Strength (σs)
|
≥ 730 MPa (up to 965 MPa after optimization for ASTM A519 SAE4140)
|
|
Elongation (δ5)
|
≥ 12 %
|
|
Reduction of Area (ψ)
|
≥ 50 %
|
|
Impact Energy (Akv)
|
≥ 63 J
|
|
Hardness (HB)
|
≤ 230 HB (annealed state); 40~50 HRC (quenched & tempered state for ASTM A519 SAE4140)
|
Chemical Composition Comparison: SAE4140 vs Domestic Alternative Material (42CrMo)
ASTM A519 SAE4140 steel pipe can be replaced by domestic 42CrMo steel in most industrial scenarios. The two materials are both chromium-molybdenum alloy steels with similar chemical compositions and mechanical properties, and the specific comparison (based on ASTM A519 standard for SAE4140) is shown in the table below:
|
Chemical Element
|
SAE4140 (ASTM A519) (%)
|
Domestic 42CrMo (%)
|
|
Carbon (C)
|
0.38 ~ 0.43
|
0.38 ~ 0.45
|
|
Silicon (Si)
|
0.15 ~ 0.35
|
0.17 ~ 0.37
|
|
Manganese (Mn)
|
0.75 ~ 1.00
|
0.50 ~ 0.80
|
|
Phosphorus (P)
|
≤ 0.035
|
≤ 0.030
|
|
Sulfur (S)
|
≤ 0.040
|
≤ 0.030
|
|
Chromium (Cr)
|
0.80 ~ 1.10
|
0.90 ~ 1.20
|
|
Molybdenum (Mo)
|
0.15 ~ 0.25
|
0.15 ~ 0.25
|
Product Advantages (For International Trade)
- Strictly Complies with ASTM A519 Standard: All ASTM A519 SAE4140 steel pipes are produced and tested in accordance with international ASTM A519 standards, with complete test reports and quality certificates, ensuring smooth customs clearance for export of SAE4140 products.
- High-Quality SAE4140 Material: The addition of chromium and molybdenum elements enhances the strength, toughness and hardenability of the SAE4140 steel pipe, which can withstand high temperature, high pressure and frequent mechanical wear, and has a long service life, fully meeting ASTM A519 requirements.
- Wide Size Range: The outer diameter ranges from 20mm to 140mm, covering most industrial application needs of ASTM A519 SAE4140 steel pipe, and supports customized processing of special specifications to meet the diverse needs of overseas customers.
- Excellent Processability: The ASTM A519 SAE4140 steel pipe is easy to cut, weld, quench and temper, reducing the processing difficulty for customers and improving production efficiency of SAE4140 components.
- Cost-Effective Alternative: Domestic 42CrMo can be used as a substitute for SAE4140 (ASTM A519), which helps customers reduce procurement costs while ensuring that the performance meets the ASTM A519 standard and application requirements.
Application Scenarios
ASTM A519 SAE4140 steel pipe is widely used in various international industrial fields due to its excellent comprehensive performance, including but not limited to: automotive transmission shafts, engine components, high-pressure hydraulic pipelines made of SAE4140, oil drilling tools, aerospace structural parts, mechanical gears, mold cores and high-load bearings. This ASTM A519 SAE4140 steel pipe has been exported to many countries and regions, and has won unanimous praise from customers for its stable quality and reliable performance that complies with ASTM A519 standard.
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