JIS G3459 SUS 309 STP Introduce
JIS G3459 SUS 309 STP steel pipes are most commonly used for applications that require a high level of durability and strength. Pipes produced utilizing JIS G3459 SUS 309 STP are ideal for a wide range of piping applications, including hot water transfer, steam systems, structural supports and boilers. The mechanical properties of a steel pipe are determined by the shape, strength, size and composition of the material. The mechanical properties of JIS G3459 SUS 309 STP steel pipes include tensile strength, yield strength, Young's modulus and hardness. Tensile strength, or the maximum stress a material can endure without being deformed or fractured, is typically measured in MPa. Yield strength is the stress that a material will experience when it reaches a specified yield point. Young's modulus measures a material's elasticity, or how much the material will stretch when a force is applied to it, and is expressed in GPa. Higher values indicate better elasticity. Hardness, or how resistant a material is to wear and abrasion, is measured in a variety of ways, including the Brinell scale.
Smelting temperature:1386°C - 1818°C
Application:stainless steel pipe
JIS G3459 SUS 309 STP Material Chemical Composition
The chemical composition of the JIS G3459 SUS 309 STP steel are as follows:
| Element | Min | Max |
|---|---|---|
| Silicon (Si) | - | 1.0000 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0450 |
| Nickel (Ni) | 12.0000 | 15.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 22.0000 | 24.0000 |
| Carbon (C) | - | 0.0800 |
JIS G3459 SUS 309 STP Material Mechanical Properties
The mechanical properties of the JIS G3459 SUS 309 STP steel are as follows:
| YieldRp0.2 | ≤ 186 (MPa) |
| TeileRm | ≤ 168 (MPa) |
| ImpactKV/Ku | 33(J) |
| ElongationA | 43% |
| Reduction in cross section on fractureZ | 42% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 412 |
JIS G3459 SUS 309 STP Material Thermal Properties
The thermal performance parameters of the JIS G3459 SUS 309 STP steel are as follows:
| Temperature (°C) | 34 | 139 | 434 |
| Modulus of elasticity (GPa) | - | 412 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 13.3 | 14.2 |
| Specific thermal capacity (J/kg·°C) | - | 431 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.32 | - | - |
| Deity (kg/dm³) | - | - | 344 |
| Poisson’s coefficient, ν | - | - | 112 |