JIS G3459 — Stainless steel pipes for piping
Grades
SUS304TP, SUS304LTP, SUS316TP, SUS316LTP, SUS321TP, SUS347TP, SUS310STP, SUS310HTP, SUS309STP, SUS309HTP
Chemical composition and mechanical properties
| Grade | Chemical composition | Mechanical properties |
|---|---|---|
| SUS304TP | Same as SUS304 | Rm ≥520 MPa, Rp0.2 ≥205 MPa, A≥35%, Welded austenitic tube |
| SUS304LTP | Same as SUS304L | Rm ≥480 MPa, Rp0.2 ≥175 MPa, A≥35%, Welded austenitic tube |
| SUS316TP | Same as SUS316 | Rm ≥520 MPa, Rp0.2 ≥205 MPa, A≥35%, Welded austenitic tube |
Application scope
JIS G3459 specifies stainless steel pipes for piping, including both seamless and welded types, typically delivered in solution-annealed condition. The grades are primarily austenitic, including ultra-low carbon, stabilized, and heat-resistant varieties, taking into account corrosion resistance, weldability, and a certain degree of temperature resistance. The standard specifies dimensional, mechanical, and corrosion resistance tests, suitable for media transportation and piping systems from room temperature to medium and high temperatures, facilitating on-site connections.
Typical applications
Widely used in chemical and petrochemical process piping, food and beverage fluid pipelines, as well as building water supply and drainage, hot water and fire protection pipelines. Also used for gas transmission and general utility pipelines. Ultra-low carbon and stabilized varieties are suitable for applications requiring high corrosion resistance after welding, while heat-resistant varieties can be used for medium and high temperature media. With its excellent corrosion resistance and weldability, it is a commonly used pipe material in general piping systems.
