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ASTM A554 SS 321 Square Hollow Section, Grade 321H A554 SS Square Tube Suppliers in Mumbai, Gr 321/321H SS ASTM A554 SHS Tubing Stockists in India, Stainless Steel UNS S32100 SHS Pipe, ASME SA554 Stainless Steel UNS S32109 Square Pipe.
A554 SS 321 Structural Square Hollow Sections, 321H Stainless Steel Welded Square Tubes Dealers in India, ASTM A554 Gr.321 Stainless Steel Seamless Square Hollow Sections, ASME SA554 Steel 321H ERW SHS Pipes.
DIN 1.4878, 1.4541 SS Square Hollow Section Pipes, SS SUS 321 Square Box Sections Distributors, Stainless Steel A554 Gr 321H SHS Tubes, AISI 321 Stainless Steel Square Hollow Section Tube Exporters in Mumbai, India.
Table of Content
- Stainless Steel A554 Gr 321 / 321H Square Hollow Sections
- Specification of Stainless Steel A554 Gr 321 / 321H Square Pipe
- 321/321H Stainless Steel A554 Square Hollow Sections Equivalent Grades
- Chemical Composition of Gr 321/321H Stainless Steel A554 SHS Tube
- Mechanical Properties of SS 321/321H A554 Structural Hollow Section
- ASTM A554 / ASME SA554 321/321H Stainless Steel Square Section Sizes
- A554 Grade 321/321H Stainless Steel Square Hollow Sections Calculator
- Global supplier of Stainless Steel Type 321/321H A554 Square Hollow Section

HxB – Height x Base
Wt – Wall thickness
Kg/m – Kilos per linear metre
Er – External radius
L – Standard bar length
In this article, you will come to know about Stainless Steel A554 Gr 321/321H Square Hollow Sections that is recently the need and demand of various industries across the globe. Also, making use of high-quality class components along with complicated amenities, this square hollow section is developed. Under the supervision of professionals, the product is developed and then sent for the testing. In addition, to it, the product is available at the most affordable rates within the economy. Customers can now obtain this presented product in the customized choices, as per their necessities.
If we talk about its features that are durable, has a longer life as well as précised design. Also, it can be used in shipbuilding, structural works, and oil and gas refinery, construction and so on. It has another good feature such as optimum quality, cost-effective, eco-friendly, easy installation, reliable and many others. Now, it's time to know about its specifications, so first the size comes, that is from 10 mm x 20 mm to 60 mm x 120 mm. the thickness of it starts from 1.00 mm and finish up at 6.0 mm. The equivalent standard of this hollow section is DIN, ASME as well as EN.
These square hollow sections are packed in the solid crates and plastic caps are mostly used to cover up its both ends. By doing so, the product can be sheltered from being damaged and rusted till the last stage of production. Also, on the packaging box of it, manufacturer's name, and other details are noted down regarding it.

ASTM A554 Gr 321/321H Stainless Steel Square Hollow Sections Specification
Specifications : ASTM A554 / ASME
SA554(Ornamental Tubing Specification) or ASTM A 312
Size : 20x20mm to 400x400mm, other non
standard sizes available on request
Wall Thickness : 0.5mm to 6mm
Length : Up to 6 meters, custom cut
lengths
Type : Seamless/ Welded / ERW
Finish : 2B, No.1 Pickled Finish, No.4
finish, BA Finish, No.8 Mirror Finish, Electropolished Square
Pipes
Delivery Condition : Bright Annealed,
Polished or Annealed and Pickled
Packing : In bundles, coating, Ends can be
bevelled or square cut, End Capped Certification &
supplementary test, Finishing & Identity Mark
ASME SA554 321 / 321H Stainless Steel Square Hollow Section Equivalent Grades
STANDARD | WERKSTOFF NR. | UNS | JIS | EN |
SS 321 | 1.4541 | S32100 | SUS 321 | X6CrNiTi18-10 |
SS 321H | 1.4878 | S32109 | SUS 321H | X12CrNiTi18-9 |
Stainless Steel A554 321/321H Square 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 |
A554 Gr 321/321H SS Structural Square Hollow Section Mechanical Properties
Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
8.0 g/cm3 | 1457 °C (2650 °F) | Psi – 75000 , MPa – 515 | Psi – 30000 , MPa – 205 | 35 % |
ASTM A554 Stainless Steel Square Hollow Sections Sizes
Size mm | kg/m | Size mm | kg/m |
20 x 20 x 2.0 | 1.12 | 20 x 20 x 2.5 | 1.35 |
25 x 25 x 1.5 | 1.06 | 25 x 25 x 2.0 | 1.43 |
25 X 25 X 2.5 | 1.74 | 25 X 25 X 3.0 | 2.04 |
30 X 30 X 2.0 | 1.68 | 30 X 30 X 2.5 | 2.14 |
30 X 30 X 3.0 | 2.51 | 40 x 40 x 1.5 | 1.81 |
40 x 40 x 2.0 | 2.31 | 40 x 40 x 2.5 | 2.92 |
40 x 40 x 3.0 | 3.45 | 40 x 40 x 4.0 | 4.46 |
40 x 40 x 5.0 | 5.40 | 50 x 50 x 1.5 | 2.28 |
50 x 50 x 2.0 | 2.93 | 50 x 50 x 2.5 | 3.71 |
50 x 50 x 3.0 | 4.39 | 50 x 50 x 4.0 | 5.72 |
50 x 50 x 5.0 | 6.97 | 60 x 60 x 3.0 | 5.34 |
60 x 60 x 4.0 | 6.97 | 60 x 60 x 5.0 | 8.54 |
60 x 60 x 6.0 | 9.45 | 70 x 70 x 3.0 | 6.28 |
70 x 70 x 3.6 | 7.46 | 70 x 70 x 5.0 | 10.11 |
70 x 70 x 6.3 | 12.50 | 70 x 70 x 8 | 15.30 |
75 x 75 x 3.0 | 7.07 | 80 x 80 x 3.0 | 7.22 |
80 x 80 x 3.6 | 8.59 | 80 x 80 x 5.0 | 11.70 |
80 x 80 x 6.0 | 13.90 | 90 x 90 x 3.0 | 8.01 |
90 x 90 x 3.6 | 9.72 | 90 x 90 x 5.0 | 13.30 |
90 x 90 x 6.0 | 15.76 | 90 x 90 x 8.0 | 20.40 |
100 x 100 x 3.0 | 8.96 | 100 x 100 x 4.0 | 12.00 |
100 x 100 x 5.0 | 14.80 | 100 x 100 x 5.0 | 14.80 |
100 x 100 x 6.0 | 16.19 | 100 x 100 x 8.0 | 22.90 |
100 x 100 x 10 | 27.90 | 120 x 120 x 5 | 18.00 |
120 x 120 x 6.0 | 21.30 | 120 X 120 X 6.3 | 22.30 |
120 x 120 x 8.0 | 27.90 | 120 x 120 x 10 | 34.20 |
120 X 120 X 12 | 35.8 | 120 X 120 X 12.5 | 41.60 |
140 X 140 X 5.0 | 21.10 | 140 X 140 X 6.3 | 26.30 |
140 X 140 X 8 | 32.90 | 140 X 140 X 10 | 40.40 |
140 X 140 X 12.5 | 49.50 | 150 X 150 X 5.0 | 22.70 |
150 X 150 X 6.3 | 28.30 | 150 X 150 X 8.0 | 35.40 |
150 X 150 X 10 | 43.60 | 150 X 150 X 12.5 | 53.40 |
150 X 150 X 16 | 66.40 | 150 X 150 X 16 | 66.40 |
180 X 180 X 5 | 27.40 | 180 X 180 X 6.3 | 34.20 |
180 X 180 X 8 | 43.00 | 180 X 180 X 10 | 53.00 |
180 X 180 X 12.5 | 65.20 | 180 X 180 X 16 | 81.40 |
200 X 200 X 5 | 30.50 | 200 X 200 X 6 | 35.8 |
200 x 200 x 6.3 | 38.2 | 200 x 200 x 8 | 48.00 |
200 x 200 x 10 | 59.30 | 200 x 200 x 12.5 | 73.00 |
200 x 200 x 16 | 91.50 | 250 x 250 x 6.3 | 48.10 |
250 x 250 x 8 | 60.50 | 250 x 250 x 10 | 75.00 |
250 x 250 x 12.5 | 92.60 | 250 x 250 x 16 | 117.00 |
300 x 300 x 6.3 | 57.90 | 300 x 300 x 8 | 73.10 |
300 x 300 x 10 | 57.90 | 300 x 300 x 8 | 90.70 |
300 x 300 x 12.5 | 112.00 | 300 x 300 x 16 | 142.00 |
350 x 350 x 8 | 85.70 | 350 x 350 x 10 | 106.00 |
350 x 350 x 12.5 | 132.00 | 350 x 350 x 16 | 167.00 |
400 x 400 x 10 | 122.00 | 400 x 400 x 12 | 141.00 |
400 x 400 x 12.5mm | 152.00 | 400 x 400 x 16 | 192 |
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JF Engineering Products LLP is a leading Suppliers, Exporters, Stockists, Distributors, ready inventory stocks, Manufacturer, Traders, Dealer, Importer, Provider, Stockholder, Wholesaler of ASTM A554 Stainless Steel 321H Square Box Sections, A554 SS 321 Square Pipes, Stainless Steel 321/321H A554 Square Tubing in Mumbai, India.
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