JIS G3459 SUS 321 HTP Introduce
JIS G3459 SUS 321 HTP pipes specified in this standard generally fall under the category of stainless steel pipes. The material that is used for the manufacture of these pipes is the stainless steel. Stainless steel is a material comprised of various mixtures of iron and other elements such as nickel, titanium, chromium, and carbon. These elements give stainless steel its remarkable properties such as corrosion resistance, durability, and strength. It is because of these properties that stainless steel is used in a wide range of applications and products, including kitchen appliances, automobiles, and industrial machinery. The stainless steel pipes conforming to JIS G3459 SUS 321 HTP are divided into different categories depending on their outer diameter, wall thickness, length and form. The categories are as follows, 1) Light Wall Pipes, 2) Medium Wall Pipes, 3) Thick Wall Pipes, 4) Long Length and 5) Special Lengths. These pipes could also be manufactured in two different forms i.e. seamless and welded.
Smelting temperature:1283°C - 1178°C
Application:stainless steel pipe
JIS G3459 SUS 321 HTP Material Chemical Composition
The chemical composition of the JIS G3459 SUS 321 HTP steel are as follows:
| Element | Min | Max |
|---|---|---|
| Titanium (Ti) | - | 0.6000 |
| Silicon (Si) | - | 0.7500 |
| Sulfur (S) | - | 0.0300 |
| PhOsphorus (P) | - | 0.0300 |
| Nickel (Ni) | 9.0000 | 13.0000 |
| Manganese (Mn) | - | 2.0000 |
| Chromium (Cr) | 17.0000 | 20.0000 |
| Carbon (C) | 0.0400 | 0.1000 |
JIS G3459 SUS 321 HTP Material Mechanical Properties
The mechanical properties of the JIS G3459 SUS 321 HTP steel are as follows:
| YieldRp0.2 | ≤ 955 (MPa) |
| TeileRm | ≤ 673 (MPa) |
| ImpactKV/Ku | 12(J) |
| ElongationA | 32% |
| Reduction in cross section on fractureZ | 32% |
| As-Heat-Treated Condition | Solution and Aging, Annealing, Ausaging, Q+T,etc |
| Brinell hardness (HBW) | 214 |
JIS G3459 SUS 321 HTP Material Thermal Properties
The thermal performance parameters of the JIS G3459 SUS 321 HTP steel are as follows:
| Temperature (°C) | 43 | 268 | 469 |
| Modulus of elasticity (GPa) | - | 149 | - |
| Mean coefficient of thermal expaion ×10-6/(°C) | - | - | 42 |
| Thermal conductivity (W/m·°C) | - | 24.3 | 33.2 |
| Specific thermal capacity (J/kg·°C) | - | 322 | - |
| Specific electrical resistivity (Ω mm²/m) | 0.12 | - | - |
| Deity (kg/dm³) | - | - | 142 |
| Poisson’s coefficient, ν | - | - | 141 |