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ASTM 321 310S Polished Stainless Steel Metal Pipe Rectangular
How stainless steel is made
The exact process for a grade of stainless steel will differ in the later stages. How a grade of steel is shaped, worked and finished plays a significant role in determining how it looks and performs.
Before you can create a deliverable steel product, you must first create the molten alloy.
Because of this most steel grades share common starting steps.
Step 1: Melting
Manufacturing stainless steel starts with melting scrap metals and additives in an electric arc furnace (EAF). Using high-power electrodes, the EAF heats the metals over the course of many hours to create a molten, fluid mixture.
As stainless steel is 100% recyclable, many stainless orders contain as much as 60% recycled steel. This helps to not only control costs but reduce environmental impact.
Exact temperatures will vary based on the grade of steel created.
Step 2: Removing Carbon Content
Carbon helps to increase the hardness and strength of iron. However, too much carbon can create problems—such as carbide precipitation during welding.
Stainless Steel Metal Pipe Specification
| Name | ASTM 321 310S Polished Stainless Steel Metal Pipe Rectangular |
| Items | 300 Series |
| Standard | ASTM A554 |
| 304: Ni 8%, Cr 18% | |
| Outer Diameter | 1"(25.4mm) |
| Thickness | 0.24mm - 1.9mm |
| Length | 4m, or as customers' request |
| width | 14mm |
| height | 10mm |
| 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 |
