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[China]
Trade Verify
Address: NO.2 Haining Road,Ningcun Industrial Zone,Haibin Street,Wenzhou Bay New Area,Wenzhou, Zhejiang,China
Contact name:Marilyn
Wenzhou Shangle Steel Co., Ltd. |
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Verified Suppliers
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Overview
TP321 is a stable stainless steel. Its main advantage is that it
has excellent resistance to intergranular corrosion after exposure
to the chromium carbide precipitation temperature range of 800 ° F
to 1500 ° F (427 ° C to 816 ° C). The 321 stainless steel pipe can
stably form chromium carbide by adding titanium.
321 stainless steel is a titanium stabilized version of 304 for
specific applications within the sensitization temperature range.
Its anti-sensitization ability and its high strength at high
temperature make it suitable for applications where 304 will be
sensitized or 304L thermal strength is insufficient. When exposed
to a slightly corrosive environment, there will be no intergranular
corrosion of weld corrosion. However, welding 321 must not be used
in a highly oxidizing environment because it is vulnerable to
"knife line" erosion. However, 321 is a better choice in the
working temperature environment of more than 500 ° C, so it has its
own advantages. 321 stainless steel pipe is also conducive to
high-temperature use due to its good mechanical properties. 321
stainless steel has higher creep and stress fracture properties
than alloy 304, especially alloy 304L can also be considered for
sensitive and intergranular corrosion problems.
321 stainless steel is basically made of 304 stainless steel. The
difference between them is that very little titanium is added. The
real difference is their carbon content. The higher the carbon
content, the greater the yield strength. 321 stainless steel has
advantages in high-temperature environments due to its excellent
mechanical properties. Compared to SS304, 321 stainless steel has
better ductility and stress fracture resistance. In addition, 304L
can also be used to resist sensitization and intergranular
corrosion.
Chemical Composition
Mat. | C | Si | Mn | P | S | Cr | Ni | Ti |
|---|---|---|---|---|---|---|---|---|
| 321 | 0.08 | 1.00 | 2.00 | 0.045 | 0.030 | 17.0/19.0 | 9.0/12.0 | 5 X C Min – 0.70 Max |
Material Grade:
| American Standard | Austenitic Steel: TP304,TP304L,TP304H, TP304N, TP310S,TP316,TP316L,TP316Ti,TP316H, TP317,TP317L, TP321, TP321H,TP347, TP347H,904L… Duplex Steel : S32101,S32205,S31803,S32304,S32750, S32760 Others:TP405,TP409, TP410, TP430, TP439,... |
| Europen Standard | 1.4301,1.4307,1.4948,1.4541,1.4878,1.4550,1.4401,1.4404,1.4571,1.4438, 1.4841,1.4845,1.4539,1.4162, 1.4462, 1.4362, 1.4410, 1.4501 |
Size Range:
| Production | Outside Diameter | Wall Thickness |
| Heat Exchanger Tube | 6.00mm to 101.6mm | 0.5mm to 8mm |
Quality tests:
| Corrosion Test | Conducted only when specially requested by the client |
| Chemical Analysis | Test done as per required quality standards |
| Destructive / Mechanical Testing | Tensile | Hardness | Flattening | Flare | Flange |
| Reverse-bend and Re. flat tests | Carried out in full compliance with relevant standards & ASTM A-450 and A-530 norms, which ensures trouble-free expansion, welding & use at customers end |
| Eddy Current Testing | Done to detect homogeneities in subsurface by using Digital Flaw-mark Testing System |
| Hydrostatic Testing | 100% Hydrostatic Testing carried out according to ASTM-A 450 norms for checking tube leakage, and biggest pressure we can support 20Mpa/7s . |
| Air Under Pressure Test | To check any evidence of air leakage |
| Visual Inspection | After passivation, every single length of tubes & pipes is subjected to thorough visual inspection by trained staff for detecting surface flaws & other imperfections |
Supplementary Tests:
Apart from the above mentioned tests, we also carry out on the manufactured products supplementary testing.
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