316 Supplier | Bar, Tube, Plate - Hangbo Alloy
Date: 2026年1月29日 Categories: Stainless Steel Views: 369
Shanghai Hangbo Alloy Group Co., Ltd. is an ISO 9001:2015 certified manufacturer and global supplier of 316 stainless steel (UNS S31600 / EN 1.4401 / GB 0Cr17Ni12Mo2) round bars, plates, sheets, strips, seamless and welded tubes, pipes, forgings and wire. As the molybdenum-bearing upgrade of 304, 316 (2–3% Mo) delivers markedly superior resistance to chlorides, pitting and seawater — the standard choice for marine, chemical, pharmaceutical and food-processing applications worldwide.
Standards
- ASTM A240 / A240M — Plate, Sheet, Strip
- ASTM A276 — Bar, Rod, Shapes
- ASTM A312 / A213 — Seamless & Welded Pipe / Tube
- ASTM A182 / A182M — Forgings & Flanges
- ASME SA240 / SA276 / SA312
- UNS S31600 / EN 1.4401 / DIN X5CrNiMo17-12-2 / GB 0Cr17Ni12Mo2
Precise ASTM Chemical Composition (%)
| Element | Range / Max |
|---|---|
| Chromium (Cr) | 16.0 – 18.0 |
| Nickel (Ni) | 10.0 – 14.0 |
| Molybdenum (Mo) | 2.0 – 3.0 |
| Carbon (C) | 0.08 max |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 0.75 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 max |
| Nitrogen (N) | 0.10 max |
Physical & Mechanical Properties
| Property | Typical Value (Min) |
|---|---|
| Tensile Strength (Annealed, ASTM A240) | 515 MPa (75 ksi) |
| Yield Strength (0.2% Offset) | 205 MPa (30 ksi) |
| Elongation (in 2") | 40% |
| Hardness | ≤ 217 HB / ≤ 95 HRB |
| Density | 8.0 g/cm³ |
| Melting Range | 1370 – 1400 °C |
| PREN (Pitting Resistance Equivalent) | ≈ 24 |
| Service Temperature | –196 °C to 870 °C (intermittent) |
Depth Characteristics
- Chloride Pitting Resistance: Molybdenum (2–3%) lifts pitting and crevice corrosion resistance far above 304 — PREN ≈ 24.
- Marine & Coastal Performance: Proven in coastal atmospheres, docks, offshore racks and seawater-handling systems.
- Chemical Process Resistance: Excellent in acetic, phosphoric, dilute sulfuric and organic acids, plus sulfite liquors.
- Hygienic & Pharmaceutical Grade: Readily polished to sanitary finishes for pharma, biotech and food processing.
- Strong & Weldable: Full-strength austenitic properties with weldability across all standard processes; 316L variant for heavy-section welding.
Manufacturing Process — Melting & Rolling
316 is melted in EAF and refined by AOD with precise control of molybdenum recovery, carbon and nitrogen. Slabs are continuously cast, hot-rolled, then solution annealed at 1038–1120°C and rapidly water quenched to keep molybdenum in solid solution and maximize corrosion resistance. Coils and plates are pickled and passivated; bars are annealed, peeled and straightened with tight tolerances for machining and valve applications.
Testing & Inspection Methods — 100% PMI / UT
- PMI (Positive Material Identification): 100% XRF verification of Cr, Ni and Mo on every heat before dispatch.
- UT (Ultrasonic Testing): Full-length ultrasonic examination of bar per ASTM A388/E2375 where specified.
- Mechanical & Chemical: Tensile and hardness per ASTM A370/A240; chemical analysis per ASTM E353 with EN 10204 3.1 certificates.
- Plus: intergranular corrosion test (ASTM A262), ferrite measurement, hydrostatic testing of pipe, and 100% dimensional inspection.
High-Frequency Application Scenarios
- Marine & Coastal: Dock hardware, offshore platform piping, seawater-cooled heat exchangers.
- Chemical Processing: Storage tanks, reactors and piping for acids and aggressive intermediates.
- Pharmaceutical & Biotech: Sanitary vessels, clean-room piping and WFI systems.
- Food & Beverage: Breweries, dairies, juice and edible-oil processing lines.
- Pulp & Paper: Digesters, bleach-plant equipment and liquor systems.
6+ Professional FAQs
1. What is the difference between 316 and 316L?
Carbon content: 0.08% max for 316 vs 0.03% max for 316L. 316L is preferred for heavy-section welding to avoid sensitization and weld decay.
2. What does PREN ≈ 24 mean?
Pitting Resistance Equivalent Number (Cr + 3.3Mo + 16N) — an index of resistance to chloride pitting. 316’s value of ~24 is well above 304’s ~19.
3. Is 316 suitable for seawater?
It performs well in marine atmospheres and moving seawater; for stagnant or full-strength seawater immersion, consider duplex or 6Mo super-austenitic grades.
4. Is 316 magnetic?
Essentially non-magnetic when annealed; slight magnetism can appear after cold working.
5. How does 316 compare with 304?
316 adds 2–3% Mo, raising resistance to pitting, crevice corrosion and chloride attack — the reason it dominates marine and chemical service.
6. Which product forms are available?
Round bar, plate, sheet, strip, seamless and welded tube/pipe, forgings, flanges and wire — with EN 10204 3.1 certificates and full traceability.
Supply List
- Round Bar: Φ6mm – Φ500mm, peeled / ground
- Plate / Sheet: Thickness 0.3mm – 120mm, cut-to-size
- Seamless Tube: OD 6mm – 219mm
- Welded Pipe: OD 19mm – 1016mm
- Forgings / Flanges: Custom per drawings
- Wire: Φ0.05mm – 12mm
Need certified 316 stainless steel for marine or chemical service? Contact Shanghai Hangbo Alloy Group for instant quotations, stock availability and mill certificates — quick response within 10 minutes. Email: sales@hangboalloy.com / Tel: +86 13611656360.
