Phanuphong Steel and Plates, based in Bangkok, Thailand, is a reputable manufacturer and supplier of top-quality alloy steel products, including Alloy Steel T91 tubing. Renowned for its commitment to quality, reliability, and compliance with international standards, Phanuphong delivers T91 tubing that meets the rigorous demands of high-temperature and high-pressure applications. The company caters to essential industries such as power generation, petrochemicals, and boiler manufacturing. With a strong emphasis on material integrity, corrosion resistance, and prompt delivery, Phanuphong Steel has built a solid reputation as a go-to supplier for clients in search of durable and high-performance tubing solutions throughout Southeast Asia and beyond.
Alloy Steel T91 tubing is a ferritic-martensitic steel primarily made up of chromium (8–9.5%), molybdenum (0.85–1.05%), vanadium (0.18–0.25%), and nitrogen, all resting on a carbon steel base. It’s engineered for high-temperature applications, boasting impressive creep strength, oxidation resistance, and thermal stability. Typically, T91 tubing has a minimum tensile strength of 585 MPa and a yield strength of at least 415 MPa, with an elongation of no less than 20%. These characteristics are further improved through heat treatment methods like normalizing, tempering, and quenching, making it well-suited for challenging thermal and mechanical environments.
| ASTM A213 T91 Specification & Standard | ASTM A213 T91, ASME SA213 T91 (with IBR Test Certificate) |
|---|---|
| SA 213 Gr T91 Specification | ASTM A213 & ASTM A209 BS/3059/ 90/ Part II/ 620 & 622 DIN/ 17175/ 13CrMo44 DIN/ 17175/ 10CrMo910 DIN/ 17175/ 15Mo3 |
| T91 Steel Tube Sch. & Swg. | 10 Swg., 12 Swg., 14 Swg., 16 Swg., 18 Swg., 20 Swg., 3.6 mm Thk |
| ASTM A213 T91 Tubing Size | 6.35 mm OD to 101.6 mm OD |
| ASTM A213 T91 Pipe Thickness | 3-12mm |
| ASME SA213 Gr T91 Material Origin | European, Japanese, Korean, US, Russian, Indian (Strictly No Chinese Material) |
| Craft | Cold rolled and Cold drawn |
| ASTM A213 T91 Tube Type | Seamless / ERW / Welded / Fabricated |
| SA213 T91 Steel Tube available in Form of | Round, Square, Rectangular, Hydraulic Etc. |
| ASTM SA213 T91 Tube Tolerance | Cold drawn pipe: +/-0.1mm Cold rolled pipe: +/-0.05mm |
| ASME SA213 Grade T91 Tube Length | Standard Double & In Cut length also. |
| ASME SA213 Gr T91 Tube End | Plain End, Beveled End, Treaded |
| ASTM A213 T91 Additional Testing | NACE MR 0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc. |
| Specialized in |
|
| ASME SA213 Grade T91 Tube Application & uses | Seamless Ferritic ASTM A213 T91 Tubing for High-Temperature Service |
| Grade | C≤ | Mn | P≤ | S≤ | Si≤ | Mo |
|---|---|---|---|---|---|---|
| SA213 T91 Composition |
0.07~0.14 |
0.30~0.60 |
0.02 |
0.02 |
0.20~0.50 |
0.85~1.05 |
| Grade | Tensile Strength, MPa | Yield Strength, MPa | Elongation, % | Hardness, HB |
|---|---|---|---|---|
| ASTM A213 T91 Tubing | 585 min | 415 min | 20 min | 250 max |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| Outside Diameter | OD Tolerance | WT Tolerance | Ovality Tolerance | Cut Length Tolerance |
| OD≤ 12, 7 mm | ± 0, 13 mm | ± 15 % | – | + 3, 18 mm, – 0 mm |
| 12, 7 mm < OD ≤ 38, 1 mm | ± 0, 13 mm | ± 10 % | max, 1, 65 mm | + 3, 18 mm, – 0 mm |
| 38, 1 mm < OD ≤ 88, 9 mm | ± 0, 25 mm | ± 10 % | max, 2, 41 mm | + 4, 76 mm, – 0 mm |
Phanuphong Steel is a leading manufacturer and distributor of high-quality Alloy Steel T91 Tubing in Bangkok, Thailand. We provide top-grade steel materials and a diverse range of products, including Alloy Steel, Carbon Steel, Mild Steel, and Galvanized Steel. Our comprehensive inventory features Tubes, Pipes, Flanges, Pipe Fittings, Forged Fittings, Sheets, and Plates. Dedicated to on-time delivery and outstanding customer service, we source only the best raw materials to guarantee superior performance in industrial applications with demanding specifications. Reach out to us today for all your Alloy Steel T91 Tubing requirements!
Alloy Steel T91 tubing finds extensive use in high-pressure and high-temperature settings, thanks to its remarkable mechanical strength and thermal resistance. It’s commonly employed in superheaters, reheaters, and steam pipelines within thermal and nuclear power plants. The petrochemical and refinery sectors also rely on T91 tubing for heat exchangers, boilers, and pressure vessels. Its capacity to endure oxidation and creep at elevated temperatures makes it perfect for long-term use in demanding 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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