321/321H Stainless Steel Hollow Sections

Mill plant: QINGSHAN steel

Standards: ASTM A554, A778

Round Tube Size: OD: 4-323mm, Wall Thickness: 0.2-6.0mm

Rectangle Tube Size: 10*20-130*170mm, Wall Thickness: u 0.2-6.0mm

Square Tube Size: 4*4mm-150*150mm, Wall Thickness:  0.2-6.0mm

Type: 180 Polish, Mill Finish, Welded-Ornamental

Surface treatment: polishing, wire drawing

Surface treatment: polishing, wire drawing

Wiho metals is a leading stainless steel tubing supplier, manufacturer and processing center of the broadest stainless tubing and hollow section in China. We produce and stock round, rectangle or square welded mechanical and structural steel tubing in various sizes and shapes. The  321/321H stainless steel hollow section supplied with a wide array of diameters and thicknesses and we have the ability to customize your order with our stainless tube processing services.

The grade 321/321H Stainless steel Round/Square/Rectangle Tubing in ASTM A554, 778 for structural or mechanical applications where mechanical properties, appearance, or corrosion resistance is needed. The tubes are available as mill finish or polished in a variety of exterior dimensions and wall thicknesses. It also offers both strength and weldability for other applications.


ASTM A554 321/321H Rectangular Hollow Section Chemical Composition

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 0.10 max 9.00 – 12.00 5(C+N) – 0.70 max
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 – 19.00 0.10 max 9.00 – 12.00 4(C+N) – 0.70 max


ASTM A554 321/321H Structural Rectangular Hollow Section Mechanical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1457 °C  515 MPa  205 MPa 35 %


We offer a variety of value-added secondary services for stainless round/square/rectangle tubing that meets your special requirements, We can provide high-grade appearance, precision laser cutting, saw cutting, bending, finishing 8K, mirror polishing, profiled pipe welding, laser and plasma cutting and other processing. Contact us for more information regarding specific requirements of ASTM A544, A778 structural and mechanical stainless steel tubing, or call us now.

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