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Ss Railing Stainless Steel Square Pipe Inox Aisi 6m Astm 40mm
About Stainless steel
Stainless steel is low maintenance, and its resistance to oxidation and staining makes it an ideal material for many applications.
There are four main types of stainless steels: austenitic, ferritic, martensitic, and duplex. Austenitic stainless steel is dominant in industry and comprises over 70% of total stainless steel production. Its properties include a maximum of 0.15% carbon and a minimum of 16% chromium, yielding very strong protection against rust. Ferritic stainless steel has reduced corrosion resistance compared to austenitic grades, but fares better than martensitic stainless steel. Duplex stainless steels have high resistance to localized corrosion particularly pitting, crevice corrosion, and stress corrosion cracking.
There are six common types of stainless steel corrosion:
General
Galvanic
Intergranular
Pitting
Crevice
Stress corrosion cracking
General corrosion is considered the safest form of corrosion as it is predictable, manageable, and often preventable. Localized corrosion, such as pitting and crevice corrosion, are harder to detect due to the smaller surface area affected, but can still have damaging effects. Stress corrosion cracking is also concerning as the cracks may not be detected until the application fails.
Stainless Steel Square Pipe Specification
| Name | ASTM A554 ss316L tube/SUS 304 stainless steel tube/201 stainless steel pipe |
| Items | Ss Railing Stainless Steel Square Pipe Inox Aisi 6m Astm 40mm |
| Standard | ASTM A554 |
| Length | 3M |
| Width | 40mm |
| Height | 40mm |
| Thickness | 3mm |
| Tolerance | a)Width and height:+/- 0.2mm |
| b) Thickness: +/- 0.03mm | |
| c) Length: +/- 5mm | |
| Surface | annealing,pickling |
| sandblasting | |
| Application | industry,exhausting,welding,furniture,window |
| Test | Squash test, extended test, water pressure test,heat treatment, NDT |
Elemental comparison of the different materials
| Chemical Composition of Material | Material | 201 | 316L | 304 |
| C | ≤0.15 | ≤0.035 | ≤0.08 | |
| Si | ≤1.00 | ≤1.00 | ≤1.00 | |
| Mn | 5.5-7.5 | 2 | ≤2.00 | |
| P | ≤0.06 | ≤0.045 | ≤0.045 | |
| S | ≤0.03 | ≤0.03 | ≤0.03 | |
| Cr | 16-18 | 16-18 | 18-20 | |
| Ni | 3.5-5.5 | 10-14 | 8-11 | |
| Mechanical Property | Material Item | 201 | 202 | |
| Tensile Strength | ≥535 | ≥520 | ||
| Yield Strength | ≥245 | ≥205 | ||
| Extension | ≥30% | ≥30% | ||
| Hardness (HV) | <253 | <253 |
