4mm SS201 A554 Decorative Bending 1 Inch Stainless Steel Tubing Welded Tube Pipe
Ss201 4000mm OD Flexible Large Diameter Stainless Steel Metal Pipe
stainless steel’s molecular microstructure
A technical look: stainless steel’s molecular microstructure
When metals freeze out of the molten state, they crystallize and form grains. This crystal structure determines many of the metal’s mechanical properties. Many factors influence this microstructure.
The types of atoms in an alloy change the structure due to the molecules formed by those atomic types. Percentages of each material also determine what arrangements the atoms form.
Temperature has a profound effect on the shape of a metal’s crystal lattice. Different structures begin to form at specific temperatures. Alloys have phase tables that demonstrate what types of grains are common at different temperatures and with different percentages of important elements.
Stainless Steel Metal Pipe Specification
| Name |
Ss201 4000mm OD Flexible Large Diameter Stainless Steel Metal Pipe |
|||
| Items | 201 | |||
| Standard | ASTM A554 | |||
| Material Grade |
201: Ni 0.7%--1% |
|||
| Outer Diameter | 4000mm | |||
| Thickness | 4mm | |||
| Length | 6m, or as customers' request | |||
| Tolerance | a) Outer Diameter: +/- 0.2mm | |||
| b) Thickness: +/- 0.03mm | ||||
| c) Length: +/- 5mm | ||||
| Surface | Seamless welded and polished | |||
| 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 | ≤0.16 | ≤0.035 | ≤0.08 | |
| Si | ≤1.01 | ≤1.00 | ≤1.01 | |
| Mn | 5.5-7.6 | 2 | ≤2.01 | |
| P | ≤0.07 | ≤0.045 | ≤0.045 | |
| S | ≤0.03 | ≤0.03 | ≤0.03 | |
| Cr | 16-18 | 16-18 | 18-21 | |
| Ni | 3.5-5.5 | 10-15 | 8-11 | |
| Mechanical Property | Material Item | 201 | 202 | |
| Tensile Strength | ≥535 | ≥520 | ||
| Yield Strength | ≥245 | ≥205 | ||
| Extension | ≥30% | ≥30% | ||
| Hardness (HV) | <253 | <253 |
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