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.
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 |
STANDARD | UNS | WERKSTOFF NR. | EN | JIS |
SS 321 | S32100 | 1.4541 | X6CrNiTi18-10 | SUS 321 |
SS 321H | S32109 | 1.4878 | X12CrNiTi18-9 | SUS 321H |
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 |
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 |
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