Coils · ASTM A480 / mill standard
Mother Coil — ASTM A480 / mill standard
Mother coil — full-width coil straight from the rolling mill. Mother coils are bought by service centres and tube mills for slitting and processing.
- ASTM A480 / mill standard
- 20 grades
- EN 10204 3.1 / 3.2
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
Mother Coil: What to Know Before Ordering
- Full mill width
- Hot or cold rolled
- Heavy coil weights
Mother Coil Materials & Grades
| Grade | Material standard | Best for |
|---|---|---|
| Inconel 825 mother coil | ASTM B424 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
| SS 904L mother coil | ASTM A240 | Dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water |
| SS 304 mother coil | ASTM A240 | General corrosion resistance, food, water and architectural work |
| SS 304L mother coil | ASTM A240 | Welded tanks, piping and vessels in general corrosive service |
| SS 310 / 310S mother coil | ASTM A240 | Furnaces, burners and heat treatment at high temperature |
| SS 316 / 316L mother coil | ASTM A240 | Chloride-bearing process fluids, marine air and pharmaceutical service |
| SS 321 mother coil | ASTM A240 | High-temperature service between 425 and 815 °C |
| SS 347 mother coil | ASTM A240 | Welded high-temperature piping in refineries and power plants |
| Duplex 2205 mother coil | ASTM A240 | Strength with chloride resistance at a stainless-steel budget |
| Super Duplex 2507 mother coil | ASTM A240 | Seawater and high-chloride service where strength also matters |
| Inconel 600 mother coil | ASTM B168 | High-temperature oxidation, caustic and nuclear service |
| Inconel 625 mother coil | ASTM B443 | Seawater, high strength and high temperature in one alloy |
| Inconel 718 mother coil | ASTM B670 | Very high strength at temperatures up to about 650 °C |
| Incoloy 800 / 800H / 800HT mother coil | ASTM B409 | Furnaces, petrochemical heaters and high-temperature piping |
| Hastelloy C276 mother coil | ASTM B575 | The most aggressive mixed acids, wet chlorine and hypochlorite |
| Hastelloy C22 mother coil | ASTM B575 | Mixed oxidising and reducing acids, and weld overlays |
| Monel 400 mother coil | ASTM B127 | Seawater, hydrofluoric acid and marine service |
| S275JR mother coil | EN 10025-2 | General structures, frames and fabrication |
| S355J2+N mother coil | EN 10025-2 | Heavy structures, cranes and offshore frames |
| IS 2062 E250 / E350 mother coil | IS 2062 | Structures, fabrication and general engineering in India |
Mother coil — questions buyers ask
What width is a mother coil?
Full mill width, typically 1000 – 1600 mm depending on the mill.
Which grades are mother coils available in?
Inconel 825, SS 904L, SS 304, SS 304L, SS 310 / 310S, SS 316 / 316L, SS 321, SS 347, Duplex 2205, Super Duplex 2507, Inconel 600, Inconel 625, Inconel 718, Incoloy 800 / 800H / 800HT, Hastelloy C276, Hastelloy C22, Monel 400, S275JR, S355J2+N, IS 2062 E250 / E350.
Which standard covers mother coil dimensions?
ASTM A480 / mill standard. The material standard depends on the grade.
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