321 Stainless Steel Coil – Titanium-Stabilised High-Temperature Excellence
When your process hits 425–850 °C, everyday stainless steels sensitize and fail. 321 Stainless Steel Coil solves this with titanium (≥5×C) that ties up carbon as harmless TiC, preventing chromium depletion and intergranular corrosion. The result is a coil that retains full corrosion resistance after welding, offers creep strength to 870 °C, and feeds high-speed stamping lines for aircraft exhausts, furnace liners, and water-heater sheaths. If you need a material that survives thermal cycles without post-weld annealing, 321 Stainless Steel Coil is the undisputed champion.
321 Cold Rolled Stainless Steel Coil – Mirror 2B Finish, Thickness 0.3–3.0 mm, Mill-Direct Supply
Key Features & Benefits
- Titanium stabilised (≥5×C) – immunity to sensitisation 425–850 °C
- Continuous service to 870 °C; intermittent to 900 °C
- Excellent weldability – no post-weld stabilising heat treatment required
- Superior creep & stress-rupture strength vs 304/316
- Bright annealed BA and 2B finishes for aerospace skins
- Non-magnetic in annealed condition; low permeability after cold work
- Full ASTM A240 / EN 1.4541 / AMS 5510 compliance
Technical Specifications
Table 1 – Chemical Composition (ASTM A240)
| Element | Min % | Max % |
|---|---|---|
| Cr | 17.0 | 19.0 |
| Ni | 9.0 | 12.0 |
| Ti | 5×C | 0.70 |
| C (321) | — | 0.08 |
| C (321H) | 0.04 | 0.10 |
| Mn | — | 2.00 |
| Si | — | 1.00 |
| P | — | 0.045 |
| S | — | 0.030 |
| Fe | Balance |
Table 2 – Mechanical & Physical Properties
| Property | Room Temp. | 650 °C (1200 °F) |
|---|---|---|
| Tensile Strength | 515 MPa (75 ksi) min. | 320 MPa (46 ksi) approx. |
| Yield Strength (0.2 %) | 205 MPa (30 ksi) min. | 150 MPa (22 ksi) approx. |
| Elongation in 2" | 40 % min. | 28 % |
| Hardness HRB | 92 max. | — |
| Density | 8.0 g/cm³ (0.289 lb/in³) | — |
| Thermal Expansion | 17.2 µm/m·K (20–100 °C) | — |
Available Dimensions & Finishes
| Thickness (mm) | Width (mm) | ID (mm) | OD (max) | Finish Options |
|---|---|---|---|---|
| 0.30 – 0.50 | 1000 / 1219 / 1250 | 508 | 2000 | 2B, BA |
| 0.60 – 1.00 | 1000 / 1219 / 1250 / 1500 | 508 | 2000 | 2B, BA, No.4 |
| 1.20 – 3.00 | 1000 / 1219 / 1250 / 1500 | 508 / 610 | 2000 | 2B, No.4, HL |
| 4.00 – 6.00 | 1219 / 1500 | 610 | 2200 | No.1, HRAP |
Slit widths from 6 mm; coil weight 2–25 tons.
Product Range & Market Info
As the leading 321 cold rolled stainless steel coil manufacturer in China, we operate three 20-high Sendzimir mills and two bright-annealing lines dedicated to 321 cold rolled stainless steel coil production. Our 120 000 t annual capacity ensures that every 321 cold rolled stainless steel coil company or 321 cold rolled stainless steel coil wholesaler receives mill-direct supply with the most competitive 321 cold rolled stainless steel coil price on the market. Beyond standard 2B/BA, we supply specialty 321 stainless steel coil heating element for water heater production—precision slit to 12–50 mm width, deburred edges, and controlled tensile 620–750 MPa for optimal tube expansion. For international buyers searching for reliable china 321 cold rolled stainless steel coil sources, our export team offers bilingual MTCs, TÜV third-party inspection, and 48-hour shipment from Shanghai or Foshan stock centres. Contact us today to secure your weekly release schedule and lock the lowest 321 cold rolled stainless steel coil price available from any 321 cold rolled stainless steel coil wholesaler.
Main Applications
- Aircraft exhaust manifolds, turbine shrouds, after-burner liners
- Automotive turbo-charger housings, hot-side bellows
- Furnace muffles, radiant tubes, kiln furniture
- Petrochemical expansion joints, thermal oxidizers
- Refinery cat-cracker hardware, high-temperature gaskets
- 321 stainless steel coil heating element for water heater – sheath and annealing baskets
- Bellows, flexible hoses, thermocouple protection tubes
Specialized 321 Stainless Steel Coil Heating Element for Water Heater – Corrosion-Free Performance at 800 °C+
Why Choose Us – Mill-Direct Advantages
- PED 2014/68/EU & TÜV certified mill – EN 10204 3.1 & 3.2 MTC supplied
- 80 000 ton annual capacity – 3–5 day lead time for standard 321 cold rolled stainless steel coil
- Precision slitting 6–1500 mm width, burr ≤0.03 mm
- Same-day shipment from 25 000 t stock – real-time 321 cold rolled stainless steel coil portal
- Global export experience to 72 countries – fumigation-free crates, vessel booking, insurance
- Live 321 cold rolled stainless steel coil price – linked to LME Ni and Fe-Ti indices, fixed for 48 h
China's Top 321 Cold Rolled Stainless Steel Coil Manufacturer – Massive Stock, Fastest Delivery
Grade Comparison Table: 321 vs 304 vs 316 vs 310S vs 347
| Grade | Ti % | Mo % | Max Temp (°C) Continuous | Weld Post-Treat | Machinability | Relative Cost |
|---|---|---|---|---|---|---|
| 321 | ≥5×C | 0 | 870 | Not needed | Good | 1.1× |
| 304 | 0 | 0 | 870 | Not needed | Excellent | 1.0× |
| 316 | 0 | 2–3 | 870 | Not needed | Good | 1.35× |
| 310S | 0 | 0 | 1150 | Not needed | Fair | 1.4× |
| 347 | Nb≥10×C | 0 | 870 | Not needed | Good | 1.2× |
FAQ – 321 Stainless Steel Coil
-
What is the continuous operating temperature limit?
870 °C in air; intermittent to 900 °C. -
How does titanium stabilisation work?
Titanium combines with carbon to form TiC, preventing chromium depletion at grain boundaries during welding or thermal cycling. -
Can I weld 321 coil without post-weld anneal?
Yes, for most high-temp applications; for ultra-severe corrosive service, a 750 °C stabilising anneal can be applied. -
What affects the 321 cold rolled stainless steel coil price?
LME nickel, ferro-titanium, energy costs, and slit-width tolerance; our daily index fixes your price for 48 h. -
Do you supply 321 stainless steel coil heating element for water heater?
Yes, slit to 12–50 mm, deburred edges, controlled tensile 620–750 MPa for optimal tube expansion. -
Which countries receive your 321 cold rolled stainless steel coil?
More than 72 countries including USA, Germany, India, Brazil, UAE, South Korea, and Australia. -
What certificates accompany the shipment?
EN 10204 3.1/3.2 MTC, ISO 9001, PED 2014/68/EU, TÜV third-party inspection if required. -
How fast can you ship from China?
7 days production + 3–5 days ocean freight to Asian ports; 10 days to EU/US warehouses.
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Stop paying trader margins. Contact the leading 321 cold rolled stainless steel coil manufacturer today for the most competitive 321 cold rolled stainless steel coil price, immediate access to real-time stock, and same-day slitting for any 321 stainless steel coil heating element for water heater project.