ASTM A554 Rectangular Stainless Steel Tube

YES Stainless International supplies ASTM A554 rectangular stainless steel tube for architectural and mechanical projects where flat faces, clean corners, and true geometry are essential. We form rectangular tubes by cold-shaping a welded round, then sizing them to the required width × height. Because corners carry high stress during forming, we tune the weld seam, reduction passes, and seam orientation to reduce the chance of weld-seam splitting. Grades available include 430, 304/304L, and 316/316L with finishes from No.4 and Hairline to 180G, 240G, 320G, 400G, and 600G mirror.

What is ASTM A554?

ASTM A554 is the standard for welded stainless steel tubes used in mechanical and decorative applications. For non-round shapes, it defines limits for corner radius, squareness, twist, straightness, and dimensional tolerances so visible assemblies look uniform and fit together easily. It is not a pressure-piping standard; choose A312, A269, or A213 when the service is pressurized.

Product Overview of ASTM A554 Stainless Steel Tube

International Standard	Dimension	Stainless Steel Grade	Surface Finishes
ASTM A554 JIS G3446	OD: 10x20~100x200mm WT: 0.7~6.5mm 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 Rectangular Stainless Steel Tube

Flat, consistent faces: Controlled face bow and gloss help panels, cladding, and frames look even in direct light.
Geometry that speeds installation: Tight control of width × height, wall, squareness, and twist shortens jig and fit-up time on site.
Weld engineered for forming: Seam conditioning and forming windows are set to lower the risk of seam splitting during further fabrication.

Product Specification of ASTM A554 Stainless Steel Rectangular Tube

Outside Diameter	Thickness (mm)
mm	0.6	0.7	0.8	0.9	1.0	1.2	1.5	2.0
10x20	●	●	●	●	●	●
13x25	●	●	●	●	●	●	●
15x30	●	●	●	●	●	●	●
16x32	●	●	●	●	●	●	●
20x40	●	●	●	●	●	●	●	●
25x38	●	●	●	●	●	●	●	●
25x50	●	●	●	●	●	●	●	●
30x60	●	●	●	●	●	●	●	●
40x80	●	●	●	●	●	●	●	●
45x75	●	●	●	●	●	●	●	●

FAQs

1. What tolerances do you typically hold on width, height, wall thickness, and squareness?

We work to ASTM A554 tolerances. For many sizes, we can offer tighter internal targets. Share your drawing, and we’ll confirm achievable limits for the dimension.

2. Is there larger sizes available?

Yes. Please contact us to discuss the required sizses of stainless steel tubes.

3. Can you combine multiple sizes and finishes in one shipment?

Yes. We can combine sizes, shapes, and finishes into one shipment. Share your list and delivery window, and we’ll optimise packing and logistics for you.

4. How do you reduce corner cracking or seam splitting?

We condition the weld bead, control the reduction ratio during forming, and set the seam orientation. These steps lower stress at the corners and reduce seam-related cracking.

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

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

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.