Phanuphong Steel stands out as a trusted manufacturer and supplier of J356 Tubing right in the heart of Bangkok, Thailand. They specialize in precision-engineered carbon steel tubes that are perfect for critical industrial applications. J356 is a well-known standard for both welded and seamless mechanical tubing, celebrated for its impressive strength, toughness, and machinability. This type of tubing finds its way into hydraulic systems, automotive components, and structural applications where durability and precise dimensions are a must. Phanuphong Steel is committed to delivering top-notch product quality, sticking to international standards, offering competitive prices, and ensuring timely delivery. They cater to various industries, including automotive, construction, oil & gas, and heavy machinery, providing reliable tubing solutions.
When it comes to composition, J356 Tubing is primarily made of carbon, with carefully controlled amounts of manganese, phosphorus, sulfur, and silicon. This blend strikes a perfect balance between strength and ductility. The tubing boasts a tensile strength ranging from 485 to 620 MPa, a yield strength of about 275 MPa, and an elongation of around 20%. These properties make it ideal for forming, bending, and machining. It can handle high pressure and stress while keeping its dimensions stable. Plus, with good weldability and corrosion resistance after surface treatment, J356 tubing proves to be a versatile and dependable choice for mechanical and hydraulic applications.
| Grade: | ASME/ASTM SA179, SA192, SA210, SA178, SA214, API 5L |
|---|---|
| Size: | 1/8” NB TO 24” NB Sch 40/80/160/XXS |
| Form | Round, Square, Rectangular, Coil, U Tube, |
| Length | Single Random, Double Random & Required Length |
| End | Plain End, Bevelled End |
| Type | Seamless / ERW / Welded |
| Certification For Carbon | Mill Test Certificate as per EN 10204 / 3.2B |
| General Requirements | ASTM A 530/A 530M |
| Dimensional Tolerances | ANSI B 36.10 |
| OD Range | 1.250″ – 6.000″ (30-150mm) |
| Wall Range | 0.095″ – 1.000″ (.2.5-25mm) |
| CHEMICAL REQUIREMENTS | ||
| Element | Cast or Heat Analysis: Weight % | |
| J356 | J356 Type-A | |
| Carbon | 0.06 Min/0.18 Max | 0.02 Min/0.18 Max |
| Manganese | 0.30 Min/0.60 Max | 0.10 Min/0.60 Max |
| Phosphorus | 0.04 Max | 0.04 Max |
| Sulfur | 0.06 Max | 0.05 Max |
| MECHANICAL PROPERTIES | |
| Properties | Values |
| Yield Strength (Min) | 25,000 PSI |
| Tensile Strength (Min.) | 45,000 PSI |
| Elongation in 2” (Min) | 35% a |
| Hardness (Rockwell B)(Max) | 65 b |
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| TUBING WALL THICKNESS TOLERANCES | |||
|---|---|---|---|
| Nominal Wall Thickness (Inches) |
Nominal Tube OD Through 1” (+/- Inches) |
Nominal Tube OD Over 1” Through 2” (+/- Inches) |
Nominal Tube OD Over 2” Through 4” (+/- Inches) |
| .028 (22 Ga) | .002/.003 | .003/.003 | .003/.003 |
| .035 (20 Ga) | .002/.004 | .002/.004 | .002/.004 |
| .042 (19 Ga) | .002/.004 | .002/.004 | .002/.005 |
| .049 (18 Ga) | .004/.005 | .003/.005 | .004/.008 |
| .058 (17 Ga) | .006/.006 | .004/.008 | .004/.008 |
| .065 (16 Ga) | .006/.006 | .004/.008 | .004/.008 |
| .072 (15 Ga) | .006/.010 | .006/.010 | .006/.010 |
| .083 (14 Ga) | .006/.010 | .006/.010 | .006/.010 |
| .095 (13 Ga) | .006/.010 | .006/.010 | .006/.010 |
| .100 | .006/.010 | .006/.010 | .006/.010 |
| .109 (12 Ga) | .006/.010 | .006/.010 | .006/.010 |
| .118 | .006/.010 | .006/.010 | .006/.010 |
| .120 (11 Ga) | .006/.010 | .006/.010 | .006/.010 |
| .134 (10 Ga) | .006/.010 | .006/.010 | .006/.010 |
| .148 (9 Ga) | — | .007/.001 | .007/.011 |
| .156 (5/32) | — | .007/.011 | .007/.011 |
| .165 (8 Ga) | — | .007/.011 | .007/.011 |
| .180 (7 Ga) | — | .007/.011 | .007/.011 |
| .197 | — | .008/0.12 | .008/0.12 |
| .203 (6 Ga) | — | .008/0.12 | .008/0.12 |
| .219 (7/32) | — | .008/.012 | .008/.012 |
| .236 | — | .014/.018 | .014/.018 |
| .238 (4 Ga) | — | .014/.018 | .014/.018 |
| .259 (3 Ga) | — | .014/.020 | .014/.020 |
Across various industries that need strong yet formable carbon steel tubing, J356 Tubing is a go-to option. In the automotive world, it’s used to make drive shafts, steering components, suspension parts, and hydraulic cylinders. The construction and heavy equipment sectors rely on it for load-bearing and structural needs. It also plays a vital role in oil & gas systems, agricultural machinery, and general mechanical engineering for fluid transfer and pressure-bearing systems. With its high strength, excellent machinability, and versatility, J356 tubing guarantees safe, durable, and cost-effective performance in even the most demanding industrial settings.
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.
Copyright 2025 Phanuphong Steel. All rights reserved
