Product Description
| Advantage | Thick Wall, Precision Dimension, +QT, Polished Surface, API certificated |
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| Standard | API 5CT |
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| Grades | 4130, 4140, 4145, 4145H, 4145H MOD, 4330V, 4317, 4340, ETC |
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| Category | Seamless Round Steel Tube |
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| Outside diameter | 0.405 to 34 inch (10 to 864 mm) |
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| Inside diameter | 0.049 to 1.25 inch (1 to 80 mm) |
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| Length | Max 15 Meters / 49 Foot |
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| Process | Forged or Hot rolled + cold drawn or Borehole |
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| Heat treatment | Normalized; Annealed; Quenched and Tempered etc |
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| Surface condition | Black, Peeled, Polished etc |
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| Test | Tensile strength, Yield strength, elongation, impact value, hardness, grain size, ultrasonic test, magnetic particle testing, etc. |
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Applications
ASTM A519 AISI 4340 Steel Pipe can be made into gears, pinions, cams, cranks, clutch shafts, shafting, die cases, and a multitude of machinery parts and components etc.
Dimensions
| Process |
Outer Diameter |
Wall Thickness |
Length |
| Cold Drawn | 1/4 - 16 Inch | 1/50 - 1 5/8 Inch | 12000 mm max |
| Hot Rolled | 1 1/2 - 30 Inch | 1/8 - 8 Inch | 12000 mm max |
Steel Grade Comparison
| ASTM |
AS |
DIN |
BS |
JIS |
GB |
| 4340 |
4340 |
1.6565 / 40CrNiMo6 |
EN24 / 817M40 |
SNCM439 / SNCM8 |
40CrNiMo |
Chemical Composition (%)
| C | Mn | Si | P | S | Cr | Ni | Mo |
| 0.37-0.44 | 0.55-0.90 | 0.10-0.35 | 0.040 max | 0.040 max | 0.65-0.95 | 1.55-2.00 | 0.20-0.35 |
Technical Details
- Delivery Condition: HF: Hot Finished, CW; Cold Worked, SR: Stress Relieved or Finish Anneal, A: Annealed, N: Normalized, Q+T: Quenched and Tempered.
- Tube Ends: Square cut and deburred ends.
- Certification: Supplied with 3.1.B inspection certificate according to EN 10204 and ISO 10474.
- Marking: Indelible ink marking including Trademark, Standard, Dimensions, Steel Grade, Supply Condition, Cast No., and Item Number.
- Packaging: Strapped bundles (2000kg - 5000kg).
Frequently Asked Questions
What are the main applications for 4130, 4140, and 4340 alloy steel pipes?
These grades are primarily used in high-stress applications such as oil and gas drilling, aircraft components, automotive gears, shafts, cranks, and various heavy-duty machinery parts.
What does the "Q+T" delivery condition imply?
"Q+T" stands for Quenched and Tempered. This heat treatment process enhances the hardness, strength, and toughness of the steel, making it suitable for demanding mechanical environments.
Do you provide inspection certificates for the steel tubes?
Yes, all products are supplied with 3.1.B inspection certificates in accordance with EN 10204 and ISO 10474 standards to ensure quality compliance.
What surface treatments can be applied to the hollow bars?
We offer several surface conditions depending on your requirements, including Black (as rolled), Peeled, and Polished finishes.
Can the pipes be customized to specific lengths?
Our standard production supports lengths up to 15 meters (approx. 49 feet). Specific length requirements can be accommodated within these maximum dimensions.
What is the difference between Hot Rolled and Cold Drawn processes?
Cold Drawn tubes offer tighter dimensional tolerances and better surface finishes, while Hot Rolled tubes are more cost-effective for larger diameters and thicker walls where extreme precision is less critical.
Campfire Steel
