310 Supplier | Bar, Tube, Plate - Hangbo Alloy
Date: 2026年1月28日 Categories: Stainless Steel Views: 371
Shanghai Hangbo Alloy Group Co., Ltd. is an ISO 9001:2015 certified manufacturer and global supplier of 310 stainless steel (UNS S31000 / EN 1.4845 / GB 06Cr25Ni20) round bars, plates, sheets, strips, seamless and welded tubes, pipes, forgings and wire. As a high-chromium, high-nickel 25Cr-20Ni austenitic grade, 310 delivers exceptional oxidation resistance and high-temperature strength up to 1035°C continuous service — the proven material for furnaces, kilns, heat-treatment fixtures and petrochemical thermal equipment.
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 S31000 / EN 1.4845 / DIN X12CrNi25-21 / GB 06Cr25Ni20
Precise ASTM Chemical Composition (%)
| Element | Range / Max |
|---|---|
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 19.0 – 22.0 |
| Carbon (C) | 0.25 max |
| Manganese (Mn) | 2.0 max |
| Silicon (Si) | 1.50 max |
| Phosphorus (P) | 0.045 max |
| Sulfur (S) | 0.030 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 | 7.98 g/cm³ |
| Melting Range | 1400 – 1450 °C |
| Max Continuous Service (Oxidation) | 1035 °C |
| Max Intermittent Service (Oxidation) | 1150 °C |
Depth Characteristics
- Supreme Heat Resistance: Outstanding oxidation and scaling resistance to 1035°C continuous and 1150°C intermittent service.
- High-Temperature Strength: The 25Cr-20Ni chemistry maintains creep and rupture strength where 304/316 lose load-bearing capacity.
- Thermal Cycling Endurance: Good resistance to thermal shock and cyclic oxidation for furnace components that heat and cool repeatedly.
- Broad Atmosphere Compatibility: Performs well in oxidizing and mildly reducing atmospheres, including flue-gas and combustion environments.
- Good Weldability: Weldable by all standard processes with matching 310/310S fillers; suitable for heavy-section fabrication.
Manufacturing Process — Melting & Rolling
310 is melted in EAF and refined by AOD with tight control of carbon and residual elements. Slabs are continuously cast, hot-rolled and solution annealed at 1038–1120°C followed by rapid water quenching to dissolve carbides and maximize ductility. Plates and strip are pickled and passivated; bars are annealed, peeled and straightened. The higher carbon content of 310 (0.25% max) provides creep strength at elevated temperature; where welding is extensive, the low-carbon 310S (UNS S31008) is commonly specified.
Testing & Inspection Methods — 100% PMI / UT
- PMI (Positive Material Identification): 100% XRF verification of Cr and Ni 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) and 100% dimensional inspection on request.
High-Frequency Application Scenarios
- Furnaces & Kilns: Muffles, retorts, radiant tubes and furnace linings in heat-treatment and ceramic kilns.
- Heat-Treatment Fixtures: Baskets, trays, jigs and fixtures for carburizing, nitriding and annealing furnaces.
- Petrochemical: Pyrolysis and reformer furnace internals, transfer lines and tube supports.
- Power & Boiler: Superheater and reheater components for high-temperature steam service.
- Waste Incineration: Combustion chamber liners, grates and exhaust components in incinerators.
6+ Professional FAQs
1. What is the difference between 310 and 310S?
Carbon content: 0.25% max for 310 vs 0.08% max for 310S (UNS S31008). 310 offers higher creep strength at temperature; 310S is preferred where extensive welding could cause sensitization.
2. What is the maximum service temperature of 310?
Approximately 1035°C for continuous service and 1150°C for intermittent service, limited by oxidation rather than strength.
3. Can 310 be used in chloride environments?
No — like all austenitic stainless steels, 310 is susceptible to chloride stress corrosion cracking. Specify nickel alloys or duplex grades for chloride service.
4. How is 310 welded?
Use matching 310/310S fillers (e.g., ER310); keep heat input moderate and interpass temperature low to limit carbide precipitation and sigma-phase risk.
5. How does 310 compare with 314 (UNS S31400)?
314 adds up to 3% silicon, extending scaling resistance to about 1150°C, but 310 offers better fabricability and toughness for most furnace applications.
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: Φ0.5mm – 12mm
Need certified 310 stainless steel for high-temperature 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.
