Stainless Steel 321 / 321H Seamless Pipes

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Silver Tubes is one of the reliable manufacturers of SS 321/321H Seamless Pipes. We produce these pipes under the norms of global standards. Due to its features, these pipes are used in many industrial and engineering applications. We use only good quality materials which are processed from the latest machines to get high-quality seamless pipes.

About 321 alloy-
it is titanium stabilized stainless steel grade from the austenitic family. It has the higher corrosion resistance ability and phenomenal resistance to intergranular corrosion after exposure to temperatures in the chromium carbide precipitation range in temperature up to 427 deg C to 816 deg C. it has excellent oxidation resistance to 1500 deg F. moreover, it is known for higher stress to rupture and creep strength. 321 alloys have good low temperature properties and toughness.

About alloy 321H-
It has a higher carbon content of about 0.04 to 0.10%. It is developed to offer resistance to creep and higher strength up to 537 deg C. in most cases alloy meets the dual certification. SS 321H alloy can only be hardened by cold working operations, not by heat treatment operation. It is effectively welded and manufactured by standards machines.

About SS 321/321H Seamless Pipes-
These pipes are manufactured by extrusion process with a solid billet. It does not contain any type of welds or joints. However, it has a short length but continuous length. These pipes can be used in the most dilute acids at nominal temperatures and in pure phosphoric acids at down temperatures. SS 321/321H Seamless Pipes have great ability to resist polythionic acid stress corrosion cracking in the environment having hydrocarbons.

In our production facility manufactured pipes are tested for material evaluation to check the reliability of products. We supply SS pipes in the form of big bundles to add protection from damages.

Stainless Steel 321/321H Pipes

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Stainless Steel 321/321H Seamless Pipe Specification
Specifications ASTM A312/ ASME SA312
Seamless Pipes 1 / 2" NB - 16" NB
Outside Diameter 6.00 mm OD up to 914.4 mm OD, Sizes up to 24" NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Thickness Range 0.3mm – 50 mm, SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Type Seamless
Form Round Pipes, Square Pipes, Rectangular Pipes
Length Single Random, Double Random & Required Length
End Plain End, Beveled End, Treaded
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
EN 10216-5 EN 10216 321/321H Seamless Steel Pipe, EN 10216-5 1.4541 Seamless Steel Pipes for pressure purposes
EN 10217-7 EN 10217 321/321H Welded Steel Pipe, Steel EN 10217-7 1.4878 Welded Pipes for pressure purposes
Stainless Steel UNS S32100/S32109 Seamless Pipes Equivalent Grades
STANDARD UNS WERKSTOFF NR. EN JIS
SS 321 S32100 1.4541 X6CrNiTi18-10 SUS 321
SS 321H S32109 1.4878 X12CrNiTi18-9 SUS 321H
321/321H Stainless Steel Seamless Pipes 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
ASME SA312 SS TP321/TP321H Seamless Pipes Mechanical Properties
Tensile Strength Yield Strength (0.2%Offset) Elongation Hardness
Rockwell B (HR B) max Brinell (HB) max
Psi – 75000, MPa – 515 Psi – 30000, MPa – 205 35 % 95 217
SS 321/321H Pipes
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