ASTM A554 Round Stainless Steel Tube

YES Stainless International manufactures ASTM A554 round stainless steel tube for architectural and mechanical use where appearance, concentricity, and ease of fabrication matter. We supply 430, 304/304L, and 316/316L with cosmetic finishes from No.4 and Hairline to 180G, 240G, 320G, 400G, and 600G mirror. Round tubes are produced with consistent straightness, tight ovality control, and a smooth, stable weld, so curved handrails, balustrades, display frames, and street furniture install cleanly and look uniform in the field.

What is ASTM A554?

ASTM A554 is the specification for welded stainless steel tubes used in mechanical and decorative applications. It defines chemistry, mechanical properties, dimensional tolerances, corner and squareness limits (for non-round), and finish expectations suited to visible installations. ASTM A554 focuses on geometry and appearance rather than pressure rating, which makes it the preferred choice for handrails, façades, fixtures, and light structures that require clean surfaces and reliable formability.

Product Overview of ASTM A554 Stainless Steel Tube

International Standard	Dimension	Stainless Steel Grade	Surface Finishes
ASTM A554 JIS G3446	OD: 7.9~152.4mm WT: 0.5~6.5mm Standard Length: 6M	MT304, MT304L, MT316L, MT430 Grade 201, 202 as per mill's STD SUS304	Mill Finish, 180G, 240G, 320G,400G, 600G (Mirror)

Key Features of ASTM A554 Stainless Steel Tube

Roundness and ovality control: Tight limits on OD, ovality, and straightness help fittings align correctly and reduce rework during site assembly.
Weld quality for forming: Stable welding and bead conditioning support rotary draw bending and roll forming while reducing the chance of seam-related issues.
Consistent finish around the circumference: Even grain and gloss from No.4 and Hairline through the mirror, with protective plastic bags available to preserve the surface during global transportation.

Product Specification of ASTM A554 Round Stainless Steel Tube

Outside Diameter	Thickness (mm)
mm	0.4	0.5	0.6	0.7	0.8	0.9	1.0	1.2	1.5	2.0
9.6	●	●	●	●	●	●	●	●
12.7	●	●	●	●	●	●	●	●
15.9	●	●	●	●	●	●	●	●	●
19.1	●	●	●	●	●	●	●	●	●
20.4	●	●	●	●	●	●	●	●	●	●
21.3	●	●	●	●	●	●	●	●	●	●
22.2	●	●	●	●	●	●	●	●	●	●
25.4	●	●	●	●	●	●	●	●	●	●
27.2		●	●	●	●	●	●	●	●	●
31.8		●	●	●	●	●	●	●	●	●
33.4		●	●	●	●	●	●	●	●	●
38.1		●	●	●	●	●	●	●	●	●
42.7		●	●	●	●	●	●	●	●	●
48.3		●	●	●	●	●	●	●	●	●
50.8		●	●	●	●	●	●	●	●	●
60.5			●	●	●	●	●	●	●	●
63.5			●	●	●	●	●	●	●	●
76.2				●	●	●	●	●	●	●
89.1					●	●	●	●	●	●
101.6						●	●	●	●	●

FAQs

1. Is ASTM A554 round tube suitable for pressure piping?

No. ASTM A554 is a mechanical and decorative standard. For pressure service, select ASTM A312 pipe or ASTM A269 /A213 tubing as appropriate.

2. How can I verify the surface finish before ordering?

We can send a finished sample set for ASTM A554 stainless steel tube covering 180G, 240G, 320G, 400G, and 600G mirror finishes. Samples show the face finish and weld seam under real light. Once confirmed, we lock that as the control finish for production to ensure products meet your expectations.

3. Which grades should I choose for my project?

Use 430 for dry interior fixtures, 304/304L for typical architectural applications, and 316/316L in coastal or chemically aggressive environments.

4. Do you offer mirror-polished round tubes?

Yes. We supply 400G and 600G mirror finishes. Samples are available for surface check.

5. Can the weld seam be formed without splitting?

Our round stainless steel tube is welded and conditioned to support bending. For tight radii, share your bend details so we can advise on seam orientation and the minimum recommended radius.

6. What is the minimum order quantity (MOQ)?

Our stainless steel pipes and tubes are typically supplied in 6 m lengths. To reduce damage risk and optimize freight, we recommend a full-container load of about 20 MT. However, we also accept smaller orders. Share your size mix and destination, and we will propose safe packing and the most economical shipping plan.

7. What are the typical length options?

The standard commercial length is 6M. We also provide cut-to-length service using laser cutting to deliver clean, accurate ends ready for fabrication.