Welded Stainless Steel Tubes – Grades 304, 316, 316L, S32205 Finned tubes

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Changzhou Joyruns Steel Tube CO.,LTD

City: changzhou

Country/Region:china

Tel:86--13861277353

Contact Person:
Miss.Lisa View Contact Details

Welded Stainless Steel Tubes – Grades 304, 316, 316L, S32205 Finned tubes

Technique	Cold Drawn
Model Number	20MM TO 140MM
Wallthickness	0.5mm - 3mm
Brand Name	JOYRUNS
Pressurerating	Up to 25 MPa
Wall Thickness	0.1mm-20mm
Minimum Order Quantity	5TON
Packaging Details	Plastic packing,wooden box packing all is according requirement
Standard	ASTM A790
Supply Ability	2000T /M
Manufacturingstandard	ASTM A213, ASTM A269
Material	Stainless Steel
Payment Terms	T/T
Hs Code	7306400000
Delivery Time	20days
Mechanicalproperties	High tensile strength and durability
Certification	ISO9001
Surface	Annealing,polished,Pickled
Place of Origin	CHINA

Detailed Product Description

Welded Stainless Steel Tubes – Grades 304, 316, 316L, S32205

High-temperature resistance · Creep resistance · Finned tubes · Pickling & blasting services

Product Overview

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.

Material Grades & Key Features

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.

Chemical Composition (wt%) – Welded Stainless Steel Tubes

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.*

Mechanical Properties Comparison (Room Temperature)

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.

High-Temperature & Creep Resistance – Boiler / Heat Exchanger Focus

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.*

Applications – Optimized for Key Industries

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