The main components of A312 TP304 pipes include elements such as carbon, silicon, manganese, phosphorus, sulfur, nickel and chromium. Among them, the carbon content is low, usually not exceeding 0.08%, while the chromium and nickel contents are between 18.00% and 20.00% and 8.0% and 11.0%, respectively.
TP304 stainless steel is a common stainless steel material with a density of 7.93 g/cm³, also known as 18/8 stainless steel in the industry. It has the characteristics of high temperature resistance (800 degrees), good processing performance and high toughness.
A312 TP304 pipes have many advantages, including excellent corrosion resistance, good welding performance, excellent processing performance, high temperature stability, and aesthetics and cleanliness. It can remain stable in a variety of corrosive environments, such as air, water, acid, alkali, salt, etc.
A312 TP304 Chemical Composition
| SS GRADE | 304 | 304N | 304LN |
|---|---|---|---|
| Ni | 8 – 11 | 8 – 11 | 8 – 11 |
| Fe | Balance | ||
| Cr | 18 – 20 | 18 – 20 | 18 – 20 |
| C | 0.08 max | 0.08 max | 0.035 max |
| Si | 0.75 max | 0.75 max | 0.75 max |
| Mn | 2 max | 2 max | 2 max |
| P | 0.040 max | 0.040 max | 0.040 max |
| S | 0.030 max | 0.030 max | 0.030 max |
| N | 0.10 – 0.16 | 0.10 – 0.1 | |
304 Stainless Steel Pipe Tolerances
| NOMINAL PIPE SIZE (NPS) | ASTM A312 304 WELDED PIPE |
|---|---|
| IPS 1/4 to 1-1/2 | +.015/-.031 |
| IPS 2 to 4 | +.031/-.031 |
| IPS 5 to 8 | +.093/-.031 |
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