Steel Pipes - ASTM A778
| Specifications | Range |
| Out Diameter | 3"-48" |
| Wall Thickness | 0.062"-0.500" |
ASTM A778 Standard Specification for Welded Unannealed Austenitic Stainless Steel Tubular Products covers straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products intended for low and moderate temperature and corrosive service where treatment is not necessary for corrosion resistance.
TABLE 1 Chemical Requirements
| Grade | UNS Designation | Carbon maxB | Manga- nese, max |
Phos- phorus, max |
Composition, % |
Titanium |
Columbium Plus Tantalus | Nitrogen max |
||||
| Sulfur, max |
Silicon, max |
Chromium | Nickel | |||||||||
| TP 304L | S30403 | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0–20.0 | 8.0–13.0 | ... | ... | ... | 0.10 |
| TP 316L | S31603 | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 16.0–18.0 | 10.0–14.0 | 2.00 3.00 |
... | ... | 0.10 |
| TP 317L | S31703 | 0.030 | 2.00 | 0.045 | 0.030 | 1.00 | 18.0–20.0 | 11.0–15.0 | 3.0 4.0 |
... | ... | 0.10 |
| TP 321 | S32100 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0–19.0 | 9.0–12.0 | ... | C | ... | ... |
| TP 347 | S34700 | 0.08 | 2.00 | 0.045 | 0.030 | 1.00 | 17.0–19.0 | 9.0–12.0 | ... | ... | D | ... |
A New designation established in accordance with Practice E 527 and SAE J1086.
B The carbon analysis shall be reported to the nearest 0.01 %, except for the low carbon (0.030) types, which shall be reported to the nearest 0.001 %.
C The titanium content shall be not less than five times the carbon content and not more than 0.70 %.
D The columbium plus tantalum content shall be not less than ten times the carbon content and not more than 1.10 %.
