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Robust Stainless Steel Pipe Connectors | ASTM 310S & 321 Certified
Robust Stainless Steel Pipe Connectors | ASTM 310S & 321 Certified
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$1,730.00 SGD
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Product Detail Page: Robust Stainless Steel Pipe Connectors | ASTM 310S & 321 Certified
Technical Specifications
Engineered for durability and compliance with international standards.
| Parameter | ASTM 310S | ASTM 321 |
|---|---|---|
| Tensile Strength | 515 MPa (min) | 515 MPa (min) |
| Yield Strength | 205 MPa (min) | 205 MPa (min) |
| Elongation | 35% (min) | 35% (min) |
| Hardness (HB) | 192 (max) | 192 (max) |
| Corrosion Resistance | Excellent (high Cr/Ni content) | Superior (stabilized with Ti) |
| Temperature Range | -20°C to 1100°C | -20°C to 900°C |
| Standards | ASTM A312, A403, ASME B36.19 | ASTM A312, A403, ASME B36.19 |
Key Features
Material Properties
- High-Temperature Performance: Stainless steel pipe connectors made from ASTM 310S (25Cr-20Ni) excel in extreme heat, ideal for furnaces and exhaust systems. ASTM 321, stabilized with titanium, prevents carbide precipitation during welding, ensuring longevity in cyclic thermal environments.
- Corrosion Resistance: Both grades resist pitting and crevice corrosion, especially in chloride-rich environments (e.g., marine or chemical plants). The chromium oxide layer (≥10.5% Cr) self-repairs minor damage, maintaining structural integrity.
Mechanical Strength
- Tensile & Bend Strength: The stainless steel pipe fittings achieve tensile strengths exceeding 515 MPa, with elongation rates of 35%, ensuring flexibility under stress. Bend tests confirm no cracking at 180° for seamless pipes, critical for stainless steel muffler pipe systems.
Weight Calculation
Use the formula for precise weight estimation:
Example: For a 50mm OD pipe with 3mm wall thickness:
.
Manufacturing Process
Precision engineering for leak-proof connections.
| Stage | Description |
|---|---|
| Material Selection | Premium 310S/321 stainless steel billets, sourced from ISO 9001-certified mills. |
| Forming | Cold drawing or hot extrusion for seamless pipes; TIG welding for welded variants. |
| Heat Treatment | Solution annealing at 1050°C (310S) or 920°C (321) to optimize grain structure. |
| Surface Finish | Pickling, polishing, or sandblasting to achieve Ra ≤0.8μm for hygienic applications. |
| Quality Control | Hydrostatic testing, eddy current inspection, and PMI verification. |
Why Stainless Steel Rusts & Prevention
While stainless steel muffler pipe and fittings are corrosion-resistant, improper handling can cause localized rusting:
- Chloride Exposure: High chloride concentrations (e.g., seawater) penetrate the passive layer, causing pitting . Use 316L or super duplex grades for such environments.
- Mechanical Damage: Scratches from tools or abrasives expose the base metal. Post-installation passivation restores protection .
- Galvanic Corrosion: Contact with carbon steel or copper in humid conditions accelerates rusting. Insulate dissimilar metals .
Identification & Marking
- Laser Etching: Permanent markings include grade (310S/321), ASTM standard, size, and heat number .
- Color Coding: Blue for 310S (high-temp), yellow for 321 (welded applications) .
Why Choose Our Stainless Steel Products?
- Certified Quality: All stainless steel pipe connectors comply with ASTM, ASME, and EN 10204-3.1 standards.
- Custom Solutions: Tailor dimensions, schedules, and surface finishes for stainless steel pipe fittings in oil/gas, pharmaceuticals, or automotive sectors .
- Global Supply: Partnered with manufacturers like Dongshang Stainless and Hengyang Piping for rapid delivery to 30+ countries .
- Lifetime Support: Free technical guidance on installation, maintenance, and corrosion prevention.
