JIS G3448 — Stainless steel pipes are generally used for piping.
Grades
SUS304TKA, SUS304TKB, SUS316TKA, SUS316TKB
Chemical composition and mechanical properties
| Grade | Chemical composition | Mechanical properties |
|---|---|---|
| SUS304TKA | Same as SUS304 | Rm ≥520 MPa, Rp0.2 ≥205 MPa, A≥35% |
| SUS304TKB | Same as SUS304 | Rm ≥480 MPa, Rp0.2 ≥175 MPa, A≥35% |
| SUS316TKA | Same as SUS316 | Rm ≥520 MPa, Rp0.2 ≥205 MPa, A≥35% |
Application scope
JIS G3448 standard specifies stainless steel pipes for general piping, primarily for low-pressure fluid transportation in building water supply and drainage systems, delivered in annealed condition. The grades are mainly conventional and molybdenum-containing austenitic, taking into account corrosion resistance, hygiene, and good connection and weldability. The standard emphasizes the dimensions and general mechanical requirements of thin-walled pipes, suitable for water supply and drainage piping systems with low pressure but requiring corrosion resistance, hygiene, and cleanliness.
Typical applications
Widely used in building water supply and drainage, domestic hot water supply and air conditioning hot and cold water pipelines, as well as fluid pipelines in food processing and general public pipelines. Molybdenum-containing varieties are suitable for environments with poor water quality or slightly corrosive conditions. The thin-walled design facilitates crimping, grooving or welding connections. With its corrosion resistance, hygiene and easy installation, it is commonly found in residential, commercial buildings and municipal water supply systems.
