Grade 4140 Steel Pipes are highly robust alloy pipes widely utilized for engineering purposes, particularly within the oil & gas and mechanical industries. These pipes are produced based on the ASTM A519 seamless specification, giving them superior properties of strength and durability. Its hardenability, fatigue strength, and impact resistance are improved with the presence of chromium and molybdenum, and the controlled carbon content provides a good balance of strength and weldability after proper heat treatment, such as quenching and tempering. The tubes are suitable for critical applications such as shafts, gears, automotive components, and heavy machinery. In the USA Piping Solution, we provide high-quality ASTM A519 4140 tubes with strict compliance with international standards, full material traceability, and full testing certifications. We have a robust inventory of various sizes and fast delivery capability that will guarantee that our clients will be provided with reliable, high-performance alloy steel tubes that will meet their exact requirements.
Specification of ASTM A519 4140 Tubes
| Feature | Specification Details |
|---|---|
| Standard | ASTM A519 / ASME SA 519 |
| Scope | Covers both seamless hot-finished and seamless cold-finished mechanical tubing |
| Size Range | 2.375 in to 12.750 in common range |
| Outer Diameter (OD) | 1/4 in to 30 in |
| Wall Thickness | 0.375 in to 1.500 in |
| Schedules | 20, 30, 40, 80, 100, 120, 140, 160, STD, XH, XXH |
| Shapes | Round, square, hexagonal, rectangular, and special sections |
| Maximum Length | Up to 12 meters |
| Common Grades | 4140, L80, and P110 heat treated mechanicals |
ASTM A519 4140 Tubes Equivalent Grades
| Grade | Standard Specification | UNS Number | DIN German Equivalent |
|---|---|---|---|
| AISI 4140 | ASTM A519 | G41400 | 1.7225 (42CrMo4) |
Tolerance Chart of ASTM A519 4140 Tubes
| Condition | Outside Diameter (O.D.) | Wall Thickness |
|---|---|---|
| Annealed or Normalized | Per ASTM A519 standard | Per ASTM A519 standard |
| Quenched and Tempered | +/- 1% | Varies by process and outside diameter |
| General Note | Tolerance is typical but not standardized | Variation depends on process and O.D. |
Thermal Properties A519 4140 Alloy Steel Seamless Pipe and Tubes
| Property | Metric Value | Imperial Value |
|---|---|---|
| Thermal Expansion Coefficient at 0-100 deg C / 32-212 deg F | 12.2 um/m-deg C | 6.78 uin/in-deg F |
| Thermal Conductivity at 100 deg C | 42.6 W/m-K | 296 BTU-in/hr-ft2-deg F |
Comparison Table of 4140 vs 4130 Grade
| Property | Grade 4140 (This Page) | Grade 4130 | Key Difference |
|---|---|---|---|
| Carbon % | 0.38-0.43 | 0.28-0.33 | 4140 higher carbon means higher hardenability |
| Manganese % | 0.75-1.00 | 0.40-0.60 | 4140 higher Mn supports deeper hardening |
| UTS Normalised | 1020 MPa | 860 MPa | 4140 is about 19% stronger as-normalised |
| Max Hardness Q+T | 50 HRC | 48 HRC | Similar ceiling, 4140 reaches it more reliably |
| Weldability | Fair, needs preheat at 175 deg C or higher | Good, preheat at 93 deg C or higher | 4130 is easier to weld |
| Hardenability | Deep | Moderate | 4140 hardens more uniformly in thick sections |
| Typical wall limit weld | Less than 12 mm preferred | Less than 6 mm preferred | Different preheat thresholds |
| Primary applications | Gears, heavy shafts, drill collars, dies | Roll cages, hydraulic lines, aircraft tube | Different application strengths |
Different Types of ASTM A519 Grade 4140 Tubes
Price List of ASTM A519 Grade 4140 Tubes
| Product Description | Pricing Unit | FOB Price (USD) |
|---|---|---|
| AISI 4140 Pipes (ASTM A519 Grade 4140) | per Ton | $600 - $1,200 |
| A519 4140 Alloy Steel Seamless Pipes | per Ton | $650 - $900 |
| A519 4140 Alloy Steel Seamless Tubes | per Long Ton | $600 - $700 |
| AISI 4140 Grade L80 Alloy Steel Seamless Pipes | per Ton | $0 - $1,000 |
| API 5CT L80 Pipes | per Ton | $588 - $1,058 |
| AISI 4140 Chrome Moly Pipes and Tubes | per Ton | $650 - $900 |
| 4140 Alloy Steel Seamless Pipes and Tubes | per Ton | $500 - $900 |
| 4140 Alloy Steel Seamless Pipes and Tubes | per Piece | $500 - $1,000 |
| AISI L80 4140 Pipes (Project/Unit Basis) | per Unit | $100,000 - $30,000,000 |
Note: Price is subject to change without any prior notice.
Application Uses of ASTM A519 Grade 4140 Tubes
- Oil & Gas Industry
- Automotive Industry
- Heavy Machinery Industry
- Power Generation Industry
- Aerospace Industry
- Construction & Engineering Industry
- Manufacturing Industry
- Mining Industry
- Agricultural Industry
- Defense & Military Industry
Other ASTM A519 Grades
The ASTM A519 specification covers a broad range of carbon and alloy steel grades. All grades below are available as seamless mechanical tube in CDS and HFS supply conditions.
| Grade | Type | Page Link |
|---|---|---|
| 1010 | Low carbon, highest machinability in A519 carbon grades | ASTM A519 1010 Seamless Tube |
| 1020 | Low carbon, versatile, most ordered A519 carbon grade | ASTM A519 1020 Seamless Tube |
| 1035 | Mid carbon, bridges 1020 and 1040 for moderate-load parts | ASTM A519 1035 Seamless Tube |
| 1045 | Medium-high carbon, highest strength in plain carbon A519 range | ASTM A519 1045 Seamless Tube |
| 1041 | Resulfurized medium carbon for improved machinability | ASTM A519 1041 Seamless Tube |
| 1541 | High Mn resulfurized, dual machinability and hardenability benefit | ASTM A519 1541 Seamless Tube |
| 4130 | Chromium-molybdenum alloy, weldable chromoly mechanical tubing | ASTM A519 4130 Seamless Tube |
| 1040 | Base medium-carbon grade for structural machined parts | ASTM A519 1040 Seamless Tube |
Frequently Asked Questions
What is ASTM A519 material?
ASTM A519 is a standard for seamless carbon and alloy steel mechanical tubing used in structural and mechanical applications.
What is 4140 tubing?
4140 tubing is a chromium-molybdenum alloy steel tube known for high strength, toughness, and wear resistance.
What is 4140 material grade?
4140 is an alloy steel grade (AISI 4140) with chromium and molybdenum, offering good hardenability and mechanical strength.
What is the ASTM A519 equivalent to?
ASTM A519 is equivalent to various AISI/SAE mechanical tubing grades like 1020, 4130, and 4140, depending on composition.
Is ASTM A519 4140 seamless or welded?
The ASTM A519 4140 tubes mostly come in a seamless form.