SS 904L Mother CoilASTM A240 · ASTM A480 / mill standard · Manufacturer, stockist & exporter, India
Alloy 904L · UNS N08904
An SS 904L mother coil is full-width coil straight from the rolling mill, made from SS 904L to ASTM A240. Mother coils are bought by service centres and tube mills for slitting and processing.
- ASTM A240
- ASTM A480 / mill standard
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an SS 904L Mother Coil?
- What it is
- Full-width coil straight from the rolling mill
- Material
- ASTM A240
- Dimensions
- ASTM A480 / mill standard
- Grade
- SS 904L · UNS N08904
- Best at
- Dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water
SS 904L Mother Coil Specification
| Product | SS 904L Mother Coil |
|---|---|
| Material standard | ASTM A240 |
| Dimensional standard | ASTM A480 / mill standard |
| Thickness | 0.1 – 6 mm by route |
| Width | Mill width or slit to order |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Mother Coil
Mother coils are bought by service centres and tube mills for slitting and processing.
- Full mill width
- Hot or cold rolled
- Heavy coil weights
More on choosing: Mother coil guide.
SS 904L Mother Coil: Why 904L for mother coils
Mother coils are bought by service centres and tube mills for slitting and processing. In SS 904L, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Stainless coil feeds stamping, tube-making and roll-forming lines. SS 904L is picked for dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water. |
|---|---|
| Typical service | Sulphuric acid plants — Coolers, piping and tanks for dilute sulphuric acid. |
SS 904L Mother Coil Chemical Composition
| Element | Weight % |
|---|---|
| Nickel | 23.0 – 28.0 |
| Chromium | 19.0 – 23.0 |
| Molybdenum | 4.0 – 5.0 |
| Copper | 1.0 – 2.0 |
| Carbon | 0.020 max |
| Manganese | 2.00 max |
| Silicon | 1.00 max |
| Nitrogen | 0.10 max |
SS 904L Mother Coil Mechanical Properties
| Annealed plate & sheet | Value |
|---|---|
| Tensile strength | 490 MPa · 71 ksi |
| Yield strength 0.2% | 220 MPa · 31 ksi |
| Elongation | 35% |
| Hardness | 90 HRB max |
Full chemistry, properties and equivalents are on the SS 904L grade page.
SS 904L Mother Coils for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiSS 904L Mother Coil — questions buyers ask
What width is a mother coil?
Full mill width, typically 1000 – 1600 mm depending on the mill.
Which standard covers SS 904L mother coils?
The material is ASTM A240; dimensions follow ASTM A480 / mill standard. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a SS 904L mother coil?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026