SA-179 covers minimum-wall thickness, seamless cold-drawn low-carbon steel tubes for tubular heat exchangers, condensers, and similar heat transfer apparatus. Tubes shall be made by the seamless process and shall be cold drawn. Heat and product analysis shall be performed wherein steel materials shall conform to required chemicalcompositions of carbon, manganese, phosphorus, and sulfur. The steel materials shall also undergo hardness test, flattening test, flaring test, flange test, and hydrostatic test.
Chemical Properties:
| Carbon: 0.06-0.18 | Silicon: n/a |
| Manganese: 0.27-0.63 | Nickel: n/a |
| Potassium: 0.035 | Chromium: n/a |
| Sulfur: 0.035 | Molybdenum: n/a |
Mechanical Properties:
Tensile Strength:
ksi: 47
MPa: 325
Yield:
ksi: 26
MPa: 325
Elongation in 2in. or 50mm, min. : 35
Max. Hardness Rockwell B: 72
