Wuxi Baoneng Stainless Steel Co., Ltd.
Wuxi Baoneng Stainless Steel Co., Ltd. Professional one-stop supplier of stainless steel products Quality first, integrity-based
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321 seamless stainless steel pipe
321 SS is a titanium stabilized austenitic chromium-nickel stainless steel which was developed to provide an 18-8 type alloy with improved intergranular-corrosion resistance. This material is stabilized against chromium carbide formation by the addition of titanium. Since titanium has a stronger affinity for carbon than chromium, titanium carbide precipitates within the grains instead of forming at the grain boundaries. 321 stainless steel should be considered for applications requiring intermittent heating between 800ºF (427ºC) and 1650ºF (899ºC), or for welding under conditions which prevent a post-weld anneal. 321 stainless steel is non-magnetic.
Typical applications include:
Aircraft exhaust manifolds, expansion joints, bellows, furnace parts, heating element tubing, heat exchangers, woven or welded screens for high-temperature mineral processing, spiral welded tube for burner pipes and flues
ElementType 321 (Wt.%)
Carbon: 0.08 max
Manganese: 2.00 max.
Phosphorus: 0.045 max.
Sulfur: 0.030 max.
Silicon: 1.00 max.
Chromium: 17.00-19.00
Nickel: 9.00-13.00
Titanium: 5(C+N) min/ 0.70 max
Element (Wt.%)
| Carbon | Manganese | Phosphorus | Sulfur | Silicon | Chromium | Nickel | Titanium |
| 0.08max | 2.00max | 0.045max | 0.030max | 1.00max | 17.00-19.00 | 9.00-13.00 | 5(C+N) min/ 0.70 max |
Mechanical Property
| Material Item | Tensile Strength (MPa) | Yield Strength (MPa) | Extension | Hardness (HV) | Density |
| 321 | ≥520 | ≥205 | ≥40% | ≤200 | 8.03g/cm³ |
Surface Treatment
| Surface Treatment | Definition | Application |
| NO.1 | A hot - rolled piece whose surface has been treated by heat treatment, pickling or the corresponding process | Chemical Tanks, Pipes, Chemical Industry Equipment etc. |
| 2B | After cold rolling, heat treatment, pickling or other equivalent treatment, the final cold rolling to give appropriate luster | Medical Equipment, Food Industry, Construction Material, Kitchen Utensils etc. |
| BA | After cold rolling, bright heat treatment is given | Kitchen Utensils, Electric Equipment, Building Construction etc. |
| NO.4 | Products polished with abrasives 150 to 180 as specified in JIS R6001 | Kitchen Utensils, Building Construction, Medical Equipment etc. |
| HL | After polishing, use the appropriate abrasive size to form a continuous polishing streak | Building Construction etc. |
| 8K | A mirror-like reflective surface given by polishing with finer abrasives over 800 mesh | Reflector, Mirror, Interior and exterior decoration etc. |
PIPE
| Commodity | 321 seamless/welded stainless steel pipe |
| Grade | 321 |
| OD | 6mm-426mm, or as customized |
| WT | 1mm-30mm, or as customized |
| Length | 5m-7m, or as customized |
| Surface | Pickling, matt, polished, mirror |
| Application | Construction field, ships building industry, petroleum & chemical industries, war and electricity industries, food processing and medical industry, boiler heat exchange, machinery hardware fields, etc. |
| Delivery Time | 7-30 days, according to quantity |
| Price Terms | FOB/ CFR/ CIF |
| Package | In bundles, water proof packing, in wooden case, or as per customers’ requirement |
FAQ
Q1:What product information must I provide before making a purchase?