Stainless Steel Flanges

304/304L – DUAL GRADE

This is the most common grade of stainless steel. 18% Cr, 8% Ni, nonmagnetic. We provide dual grade material that has the weldability that low carbon content improves as well as the higher rating of straight 304. Do note that in high temperature applications (over 800degF), 304H would be recommended.

---

316/316/L – DUAL GRADE

This is the most common grade of stainless steel after 304/L, though due to certain industry demands, 316/L may more readily available. 18% Cr, a minimum of 10% Ni, with Molybdenum added, 316 provides superior corrosion resistance compared to 304. We provide dual grade material that has the weldability that low carbon content improves as well as the higher rating of straight 316. Do note that in high temperature applications (over 800degF), 316H would be recommended.

---

304H – UNS S30409

A high carbon variant of the most commonly used and extremely versatile stainless steel in the flange industry. 304H is an austenitic chromium stainless which contains a carbon content range of .04 – .10 to help with heat resistance for high temperature applications. It also carries all the general attributes and service properties of regular grade 304 stainless steel.

---

316H – UNS S31609

Similar in approach to 304H, grade 316H is a high carbon variant of regular grade 316 stainless steel, which contains a small percentage of molybdenum for use in marine grade applications. This austenitic grade of stainless utilizes a higher carbon content for use in higher temperature service, much like its cousin grade 304H. Though it is less commonly used, it is still commercially available.

---

316H – UNS S31609

Similar in approach to 304H, grade 316H is a high carbon variant of regular grade 316 stainless steel, which contains a small percentage of molybdenum for use in marine grade applications. This austenitic grade of stainless utilizes a higher carbon content for use in higher temperature service, much like its cousin grade 304H. Though it is less commonly used, it is still commercially available.

---

---