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| Place of Origin | CHINA |
| Brand Name | JOYRUNS |
| Certification | ISO9001 |
| Model Number | 20MM TO 140MM |
High-temperature resistance · Creep resistance · Finned tubes · Pickling & blasting services
Our welded stainless steel tubes are manufactured from austenitic grades 304, 316, 316L and duplex grade S32205. Designed for demanding applications including boilers, heat exchangers, new energy cooling systems, structural components, and automotive parts. We also provide in‑house surface treatment (blasting, pickling) and fin rolling for high‑efficiency heat dissipation.
| Grade | Key Characteristics (SEO focus) |
|---|---|
| 304 | General‑purpose austenitic stainless steel – good oxidation resistance and formability. |
| 316 | Molybdenum‑bearing (2‑3% Mo) – improved creep resistance and chloride corrosion resistance. |
| 316L | Low‑carbon version of 316 – eliminates intergranular corrosion after welding. Ideal for sustained high‑temperature service up to 850°C. |
| S32205 | Duplex stainless steel (22% Cr, 5% Ni, 3% Mo, 0.17% N). Double yield strength compared to 304/316, excellent stress corrosion cracking resistance. |
| Element | 304 | 316 | 316L | S32205 |
|---|---|---|---|---|
| Carbon (C) | ≤0.08 | ≤0.08 | ≤0.030 | ≤0.030 |
| Chromium (Cr) | 18.0–20.0 | 16.0–18.0 | 16.0–18.0 | 22.0–23.0 |
| Nickel (Ni) | 8.0–10.5 | 10.0–14.0 | 10.0–14.0 | 4.5–6.5 |
| Molybdenum (Mo) | — | 2.0–3.0 | 2.0–3.0 | 3.0–3.5 |
| Nitrogen (N) | — | — | — | 0.14–0.20 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
*Full composition (Mn, Si, P, S) available upon request. All values meet ASTM A249 / A269.*
| Property | 304 | 316 | 316L | S32205 |
|---|---|---|---|---|
| Tensile Strength Rm (MPa) | ≥515 | ≥515 | ≥485 | ≥620 |
| Yield Strength Rp0.2 (MPa) | ≥205 | ≥205 | ≥170 | ≥450 |
| Elongation (%) | ≥40 | ≥40 | ≥40 | ≥25 |
| Hardness | ≤90 HRB | ≤95 HRB | ≤95 HRB | ≤290 HB |
| Modulus of Elasticity (GPa) | 193 | 193 | 193 | 200 |
✅ S32205 offers nearly double the yield strength – allows lighter wall thickness in structural applications.
| Grade | Max Continuous Service Temp. (°C) | Creep Resistance | Suitable for Sustained Load >500°C |
|---|---|---|---|
| 304 | 800 | Moderate | ❌ No |
| 316 | 850 | Good (Mo content) | ✅ Yes |
| 316L | 850 | Good (low carbon, stable) | ✅ Yes |
| S32205 | 600–650* | Very high (strength) | ❌ (limited to <650°C) |
*S32205 not recommended for long‑term exposure above 600°C due to sigma phase embrittlement. For extreme high‑temperature creep (650‑850°C), choose 316/316L.*
Heaters, condensers, steam piping, superheaters
Keywords: high-temperature stainless steel tube, creep-resistant tube, welded boiler tube
Data center liquid cooling – smooth bore, minimal pressure drop
PV solar & wind power structural tubes (torque tubes, support frames)
Energy storage equipment pipelines (coolant lines, vent lines)
Drive shafts, bearing housings, machinery frames, roller tubes
Keywords: duplex stainless steel structural tube, high-strength welded tube (S32205)
Exhaust systems (hot end / cold end), fuel lines, interior decorative tubes
Polished / brushed finishes available
Uniform matte finish – removes weld discoloration and oxide scale
Increases surface area for coating adhesion
Ideal for industrial and structural tubes
Chemically removes heat tint, weld scale, and embedded iron
Restores full corrosion resistance after welding or heat treatment
Essential for heat exchangers, condensers, and sanitary applications
✔ Blasting + pickling available for maximum surface cleanliness.
We roll helical fins (integral or wrap‑on) onto plain welded tubes.
Increases external heat transfer surface area by 3–10×
Enables compact, high-performance heat exchangers – reduces footprint up to 50%
Excellent thermal contact & mechanical durability under thermal cycling
Suitable for air-cooled heat exchangers, boiler economizers, waste heat recovery, radiator tubes
Benefits for your applications:
✅ Higher heat transfer efficiency
✅ Lower air-side pressure drop
✅ Compatible with 304, 316, 316L, and S32205 (corrosion resistant even in finned form)
| Parameter | Details |
|---|---|
| Standards | ASTM A249 / A269 / A554, EN 10217-7 (custom) |
| OD range | 6 mm – 168 mm |
| Wall thickness | 0.5 mm – 6.0 mm |
| Length | Up to 12 m (cut-to-length available) |
| Surface finish (plain tube) | Mill finish, annealed & pickled, polished (180‑600 grit), bright annealed, blasted, pickled |
| NDT | Eddy current (ASTM E426) or hydrostatic test |
✔ High-temperature resistance – continuous operation up to 850°C (316/316L)
✔ Creep resistance – optimized alloy design for long-term stress at elevated temperatures
✔ Corrosion resistance – from urban to marine/chemical (316/316L) and high‑chloride environments (S32205)
✔ Precision welded – smooth internal bead, minimal flow disturbance
✔ One‑stop processing – blasting, pickling, and fin rolling in‑house for high‑efficiency heat transfer
Material grade (304 / 316 / 316L / S32205)
Dimensions – Outside diameter (mm) + wall thickness (mm)
Length / quantity
Surface finish (mill / polished / blasted / pickled / blasted+pickled)
Fin rolling required? – fin height, pitch, length (or full tube length)
Standard (ASTM A249, A269, A554, or other)
For a quotation or technical data sheet, contact our sales team.
We support OEM and custom specifications for boiler, heat exchanger, new energy, and structural applications.
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