Stainless Steel 321 / 321H Pipes & Tubes
Home » Stainless Steel 321 / 321H Pipes & Tubes
- Stainless Steel 321 / 321H Pipes & Tubes
- Uses and Applications of Stainless Steel 321/321H Pipes & Tubes
- Specifications of Stainless Steel 321/321H Pipes and Tubes
- 321/321H Stainless Steel Pipes and Tubes Equivalent Grades
- Chemical Composition of Stainless Steel 321/321H Pipes & Tubes
Mechanical Properties of Stainlesss Steel 321/321H Seamless Pipes & Tubes





Stainless Steel 321 / 321H Pipes & Tubes
SS 321/321H Pipes & Tubes are engineered to possess superior physical and mechanical properties including elongation, density, modulus of expansion, thermal conductivity, electrical resistivity, tensile strength, yield strength, ultimate tensile strength, electrical conductivity, and proof stress. These pipes are available in various specifications such as grade, dimensions, tolerance, applications, type, form, shape, size, schedule, finish, surface, length, width, thickness, and end. Additionally, they are offered in diverse types including seamless, welded, round, square, rectangular, polished, decorative, thick wall tubes, and electro-polished variants. Formulated with a combination of carbon, manganese, silicon, phosphorus, sulfur, chromium, nitrogen, nickel, and titanium, SS 321/321H Pipes & Tubes find application in pharmaceutical equipment, pharmaceuticals, seawater equipment, chemical equipment, specialty chemicals, gas processing, petrochemicals, power generation, heat exchangers, condensers, paper production, offshore oil drilling, and pulp manufacturing.
Recognized for their suitability in flues and spiral welded pipes, SS 321/321H Pipes & Tubes exhibit remarkable resistance to carbide precipitation due to the addition of titanium during production, enhancing their durability. Widely used in aerospace equipment and storage units for their non-corrosive nature, these tubes boast outstanding qualities including high strength, tensile strength, ductility, durability, flexibility, and formability.
Uses and Applications of Stainless Steel 321/321H Pipes & Tubes
- High-Temperature Applications
- Chemical Processing
- Oil and Gas Industry
- Aerospace Industry
- Power Generation
- Food and Pharmaceutical Industries
- Automotive Industry
- Heat Exchangers
- Other Applications

Specifications of Stainless Steel 321/321H Pipes and Tubes
Stainless steel pipe specification | astm a312, a358 / asme sa312, sa358 |
Ss tube specification | astm a213, a269, a249, a511, a554 / asme sa213, sa269, sa249, sa511, sa554 |
Pipe size | 1/8” nb to 24” nb, 1/4” od to 24” od sizes |
Tube size | 1/2″ od to 8″ od |
Thickness range | 0.3mm – 50 mm, sch 5, sch10, sch 40, sch 80, sch 80s, sch 160, sch xxs, sch xs |
Type | seamless / erw / welded / fabricated pipes |
Form | round, square, rectangular, oval, hydraulic etc |
Length | single random, double random & required length |
End | plain end, beveled end, treaded |
End protection | plastic caps |
Outside finish | 2b, no.4, no.1, no.8 mirror finish for stainless steel pipes, finish as per customer requirements |
Delivery condition | annealed and pickled, polished, bright annealed, cold drawn |
Packing | packed in wooden boxes, plastic bags, steel strips bundled, or as per customers’ requests |
Specials | sizes and specifications other than above can be manufactured on request |
- 9930066862
- Info@metaaerospaces.com
- Length: 500-10000
321/321H Stainless Steel Pipes and Tubes Equivalent Grades
STANDARD | UNS | WNR. | EN | JIS |
SS 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
SS 321H | S32109 | 1.4878 | X12CrNiTi18-9 | SUS 321H |
Chemical Composition of Stainless Steel 321/321H Pipes & Tubes
% | Cr | Ni | C | Si | Mn | P | S | N | Ti | Fe |
321 | min:17.0 max:19.0 | min: 9.0 max:12.0 | max:0.08 | max:0.75 | max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 | Balance |
321H | min:17.0 max:19.0 | min: 9.0 max:12.0 | min:0.04 max:0.10 | min:18.0 max:20.0 | max:2.0 | max:0.045 | max:0.03 | max:0.10 | min:5*(C+N) max:0.70 | Balance |
Mechanical Properties of Stainlesss Steel 321/321H Seamless Pipes & Tubes
Grade | Tensile Strength ksi (min.) | Yield Strength 0.2% Offset ksi (min.) | Elongation – % in 50 mm (min.) | Hardness (Brinell) MAX |
321/321H | 75 | 30 | 40 | 217 |