Phanuphong Steel and Plates, located in the vibrant city of Bangkok, Thailand, stands out as a top-notch manufacturer and supplier of high-quality AISI 4140 Tubing. This tubing is celebrated for its precision, durability, and consistency. Catering to a variety of industrial sectors, the company excels in offering both seamless and welded tubing solutions that adhere to international standards. With a strong focus on quality control, Phanuphong Steel guarantees that every AISI 4140 tube performs exceptionally well, even in the toughest conditions. This makes it a go-to choice for engineers, fabricators, and industrial clients who need reliable and long-lasting steel tubing solutions for their critical applications.
AISI 4140 Tubing is an alloy steel that mainly consists of carbon (0.38–0.43%), chromium (0.8–1.1%), molybdenum (0.15–0.25%), manganese (0.75–1.0%), along with trace amounts of silicon and phosphorus. This unique blend gives it remarkable strength, toughness, and wear resistance. On the mechanical side, it boasts a tensile strength ranging from 655 to 850 MPa, a yield strength of 415 to 655 MPa, and an elongation of 20 to 25%. It also features excellent fatigue resistance and hardenability. The alloy can be heat-treated to boost its hardness and mechanical performance, making it perfect for heavy-duty applications that demand durability, impact resistance, and reliable performance under high stress.
| STANDARD | WERKSTOFF NR. | UNS | AFNOR | EN | JIS | BS | GOST |
| AISI 4140 | 1.7218 | G41300 | – | 25CrMo4 | JIS G4105 | BS 970 | – |
| AISI 4140 | Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
| 0.50 max | 0.28-0.33 | 0.15-0.25 | 0.40-0.60 | 0.15-0.35 | 97.3-98.22 | – | 0.025 MAX | 0.035 MAX | 0.80-1.10 |
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
| 0.28 | 2580 | 460 MPa | 560 MPa | 20 % |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Phanuphong Steel is a leading manufacturer and distributor of high-quality AISI 4140 Tubing in Bangkok, Thailand. We offer premium steel materials and a diverse range of products, including Alloy Steel, Carbon Steel, Mild Steel, and Galvanized Steel. Our extensive inventory includes Tubes, Pipes, Flanges, Pipe Fittings, Forged Fittings, Sheets, and Plates. Committed to prompt delivery and exceptional customer service, we source the finest raw materials to ensure superior strength and performance in demanding industrial applications. Contact us today for all your AISI 4140 Tubing needs!
AISI 4140 Tubing is widely utilized across various sectors, including automotive, aerospace, oil and gas, and industrial machinery. You’ll often find it in drive shafts, crankshafts, gears, hydraulic cylinders, and high-pressure tubing. Its impressive strength, toughness, and fatigue resistance make it an ideal choice for structural components and machinery that face high stress and wear. Additionally, AISI 4140 Tubing is essential in construction equipment, mining tools, and pipeline systems, where reliability and a long service life are paramount. Engineers and fabricators trust it for applications that require precision, durability, and the ability to withstand extreme operating conditions.
Phanuphong Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Bangkok, Thailand.
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