What is stainless steel?
Stainless steel is an iron and chromium alloy.
While stainless must contain at least 10.5% chromium, the exact components and ratios will vary based on the grade requested and the intended use of the steel.
Other common additives include:
Nickel,Carbon,Manganese,Molybdenum,Nitrogen,Sulfur,Copper,Silicon
The exact composition of an alloy is strictly measured and assessed throughout the alloying process to ensure the steel exhibits the required qualities.
The common reasons to add other metals and gasses to a stainless steel alloy inclu
Increased corrosion resistance
High temperature resistance
Low temperature resistance
Improved strength
Improved weldability
Improved formability
Controlling magnetism
What’s in your stainless steel isn’t the only factor in determining its unique characteristics however…
Stainless Steel Metal Pipe Specification
| Name | 14mm Seamless Square Pipe AISI SS201 Stainless Steel Metal Pipe |
| Items | 201 |
| Standard | ASTM A554 |
| Material Grade | 201: Ni 0.7%--1% |
| | 304: Ni 8%, Cr 18% |
| | 316L:Ni10%,Cr16% |
| Length of a side | 14mm |
| Thickness | 0.3mm |
| Length | 6m, or as customers' request |
| Tolerance | a) Outer Diameter: +/- 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 | |
