ASTM A276 SS 321H Bright Round Bars
SS 321H stainless steel bright bar is an austenitic stainless steel that is manufactured to ASTM A276/A276M standard. It is a titanium-containing stainless steel designed for high temperature environments. "H" indicates a high carbon version (carbon content of approximately 0.04–0.10%).
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Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of astm a276 ss 321h bright round bars in China. With abundant experience, we warmly welcome you to wholesale customized astm a276 ss 321h bright round bars from our factory. For price consultation, contact us.
ASTM A276 is a standard for stainless steel bars and profiles developed by the American Society for Testing and Materials (ASTM), covering chemical composition, mechanical properties and processing requirements.
SS 321H stainless steel bright round bar surface is precisely processed and has a high finish. The bright round bar is cold drawn or ground, and the surface is smooth (Ra value as low as 0.2μm), which reduces impurity adhesion and improves corrosion resistance and aesthetics.
High temperature stainless steel 321H bar In the temperature range of 450–815°C, titanium inhibits the precipitation of chromium carbide and avoids intergranular corrosion, which is suitable for long-term high temperature environments (such as boilers and heat exchangers). The creep and stress rupture resistance is better than 304/304L, suitable for high temperature pressure parts.
Aerospace-grade 321H stainless steel rod
Stainless Steel 321H Round Bar Specifications:
Diameter range: 4mm ~ 200mm (bright bar);
4mm ~ 500mm (ordinary round bar).
Length: standard 2m ~ 7.5m, support customization.
Surface treatment: bright polishing, BA surface, rough turning, etc. to meet different needs.
Chemical Composition of Stainless Steel 321 Rods
| Element | Content Range |
|---|---|
| Carbon (C) | 0.04-0.10% |
| Chromium (Cr) | 17.0-19.0% |
| Nickel (Ni) | 9.0-12.0% |
| Titanium (Ti) | 5×C%-0.80% |
| Others | Si≤1.0%, Mn≤2.0% |
Mechanical Properties of UNS S32100 Stainless Steel Polished Bars
| Property | Typical Value |
|---|---|
| Yield Strength (σ₀.₂) | ≥205 MPa |
| Tensile Strength (σ_b) | ≥515 MPa |
| Elongation (δ) | ≥40% |
| Hardness (HB) | ≤201 |
321H Bright Round Bar vs Common Black Bar
| Comparison Items | 321H Bright Round Bar | Common Black Bar |
|---|---|---|
| Surface Finish | High (Ra ≤ 0.2μm) | Rough (as-hot-rolled surface) |
| Corrosion Resistance | Excellent (smooth surface reduces corrosion risks) | Requires additional surface treatment |
| Dimensional Accuracy | High (controlled by cold-drawing process) | Lower (looser tolerances) |
| Application Scenarios | Precision machinery, food/medical equipment, decorative components | Construction structures, gene |
Where to buy ASTM A276 SS 321H bright round bar-GNEE
ASTM A276 SS 321H Polishing Rod Packaging
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