Products Description
Product Specifications
| Standards | ASTM A554 |
| Steel Grades | 301,302,304,304L,305,309S,309S-Cb,310S,316,316L,317,321,330,347,429,430,430-Ti |
| Equivalent Standards |
EN 10217-7,JIS G3446 |
| Outer Diameter (OD) | 10×20 mm – 300×500 mm |
| Wall Thickness (WT) | 0.5mm-12.7mm |
| Length | 3 m – 12 m (custom lengths available) |
| Surface Treatment | Polished |
| Production Process | Automatic welding + Cold forming |
| Condition | Annealed |
316 stainless steel rectangular tubing is manufactured using a process combining automated welding with cold drawing or cold rolling, ensuring strict dimensional precision with a cross-sectional tolerance of ±0.5 mm and a wall thickness tolerance of ±0.05 mm.
316 stainless steel retains excellent strength and toughness in high-temperature environments, maintaining oxidation resistance at continuous service temperatures of up to 870°C. It is therefore well-suited for high-temperature applications, such as exhaust systems and auxiliary boiler piping in power plants.
Customized Services
- TORICH offers precision cutting to any specified length, with a length tolerance of ±1 mm and an end-face perpendicularity of ≤0.5°, thereby meeting the requirements for precision assembly.
- We provide various surface treatments, including mechanical polishing, acid pickling and passivation, and bright annealing.
- We also offer value-added processing services-such as drilling, slot milling, end chamfering, flange welding, and tube bending-performing precision finishing in accordance with customer drawings and specifications.
Manufacturing Process
Chemical Composition
| Grade | C (max) | Mn (max) | P (max) | S (max) | Si (max) | Cr (%) | Ni (%) | Mo (%) |
| 201 | 0.15 | 5.50–7.50 | 0.060 | 0.030 | 1.00 | 16.0–18.0 | 3.5–5.5 | – |
| 309 | 0.20 | 2.00 | 0.045 | 0.030 | 1.00 | 22.0–24.0 | 12.0–15.0 | – |
| 316 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0–18.0 | 10.0–14.0 | 2.0–3.0 |
Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (0.2% Proof, MPa) | Elongation (%) | Hardness (HRB max) |
| 201 | 520 min | 275 min | 40 | 95 |
| 309 | 620 min | 310 min | 40 | 95 |
| 316 | 515 min | 205 min | 40 | 95 |
Possible Alternative Grades
- 304 / 304L – Widely used, versatile, and cost-effective for general corrosion resistance.
- 310 Stainless Steel – Excellent for very high-temperature service.
- 316L Stainless Steel – Low-carbon grade with improved weldability and resistance to sensitization.
- Duplex Stainless Steel – For higher strength and chloride stress corrosion resistance.
applications areas
ASTM A554 Grade 316 stainless steel rectangular tubing is suitable for use in structural and auxiliary systems within power generation environments, including:
- Power plant structural systems: Generator enclosure frames, equipment mounting structures, etc.
- Heat transfer and thermal systems: Heat exchanger support frames, condenser structural components, etc.
- Flue gas and emission control systems: Chimney and duct support structures, exhaust gas treatment equipment frames, etc.
- Cooling and water circulation systems: Cooling tower structural supports, water system frameworks.
- Renewable energy generation systems: Structural components for solar thermal power plants.
- Offshore and coastal power stations: Structural components, offshore platform power module frames, etc.
Products Show
Testing Equipment
Factory Equipment
Pickling equipment
Products Package
fAQ
Q: Does it meet the compliance requirements for power plants?
A: It is fully compliant. The tubing is manufactured in strict accordance with the ASTM A554 standard, and a Material Test Certificate (MTC) and Non-Destructive Testing (NDT) report are provided for every batch. It also meets the requirements for ISO 9001 quality system certification and EU CE certification.
Q: How is its weldability? Can it meet the welding requirements for power plant equipment?
A: After welding, the tubing undergoes solution annealing treatment; consequently, the strength of the weld seam matches that of the base material, allowing for direct welding and installation.
Q: Can ASTM A554 rectangular tubing be used in pressure piping systems?
A: No, it cannot. ASTM A554 is a standard for mechanical tubing, designed for structural, decorative, and low-pressure mechanical applications-not for high-pressure fluid conveyance. For pressure piping systems, standards such as ASTM A312 or ASTM A358 should be selected instead.
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