304/304L polished stainless sheet coil and sheet is part of the austenitic family of stainless steel. 304 grades contain a lower level of carbon than 302 and 304/304L has a lower carbon level than straight grade 304. Types 304 and 304L have very good drawability and excellent corrosion resistance in chemical, textile, petroleum and food industry exposure. No. 4 polished surface is a non-reflective brushed finish obtained by course grinding followed by finishing with a 120-150 mesh abrasive. This general purpose bright finish has a visible grain to prevent mirror reflection. Polished surfaces are easy to clean, ensuring a minimum foothold for dirt, bacteria and corrosive substances.
TW stocks a wide range of sizes in 304/304L stainless certified to AMS 5511, ASTM A 240, and ASTM A 666.
Typical Chemical Requirements
304 | 304L | |
---|---|---|
Carbon, Max % | 0.08 | 0.03 |
Manganese, Max % | 2 | 2 |
Phosphorus, Max % | 0.045 | 0.045 |
Sulphur, Max % | 0.03 | 0.03 |
Silicon Max | 0.75 | 0.75 |
Chromium range | 18-20 | 18-20 |
Nickel range | 8.0-10.5 | 8.0 – 12 |
Nitrogen Max | 0.1 | 0.1 |
Mechanical Properties
304 | 304L | |
---|---|---|
Tensile Min | 75 ksi | 70 ksi |
Yield Min | 30 ksi | 25 ksi |
Elongation Min | 40% | 40% |
Hardness Max | 95 HRB | 95 HRB |
TW Metals offer as wide range of stock sizes and processing capabilities for your company’s needs- from 24 ga to 7 ga, 48 and 60 wide material. We also have shearing capabilities to meet your projects specific needs.