Clad Plate — ASTM A264 / A265
Clad plate — carbon-steel plate bonded to a corrosion-resistant alloy layer. Clad plate puts a thin alloy layer where the fluid is, on a cheaper carbon-steel base that carries the pressure — often far cheaper than solid alloy for thick vessels.
- ASTM A264 / A265
- 20 grades
- EN 10204 3.1 / 3.2
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is a clad plate?
A clad plate is carbon-steel plate bonded to a corrosion-resistant alloy layer. Clad plate puts a thin alloy layer where the fluid is, on a cheaper carbon-steel base that carries the pressure — often far cheaper than solid alloy for thick vessels.
Clad Plate: What to Know Before Ordering
- Explosion-bonded or roll-bonded
- Alloy layer 2–6 mm typical
- Base: SA-516 or SA-387
Clad Plate Materials & Grades
| Grade | Material standard | Best for |
|---|---|---|
| Inconel 825 clad plate | ASTM B424 | Sulphuric and phosphoric acid service, chloride stress-corrosion cracking and sour gas |
| SS 904L clad plate | ASTM A240 | Dilute sulphuric acid, phosphoric acid and chloride-bearing cooling water |
| SS 304 clad plate | ASTM A240 | General corrosion resistance, food, water and architectural work |
| SS 304L clad plate | ASTM A240 | Welded tanks, piping and vessels in general corrosive service |
| SS 310 / 310S clad plate | ASTM A240 | Furnaces, burners and heat treatment at high temperature |
| SS 316 / 316L clad plate | ASTM A240 | Chloride-bearing process fluids, marine air and pharmaceutical service |
| SS 321 clad plate | ASTM A240 | High-temperature service between 425 and 815 °C |
| SS 347 clad plate | ASTM A240 | Welded high-temperature piping in refineries and power plants |
| Duplex 2205 clad plate | ASTM A240 | Strength with chloride resistance at a stainless-steel budget |
| Super Duplex 2507 clad plate | ASTM A240 | Seawater and high-chloride service where strength also matters |
| Inconel 600 clad plate | ASTM B168 | High-temperature oxidation, caustic and nuclear service |
| Inconel 625 clad plate | ASTM B443 | Seawater, high strength and high temperature in one alloy |
| Inconel 718 clad plate | ASTM B670 · AMS 5596 | Very high strength at temperatures up to about 650 °C |
| Incoloy 800 / 800H / 800HT clad plate | ASTM B409 | Furnaces, petrochemical heaters and high-temperature piping |
| Hastelloy C276 clad plate | ASTM B575 | The most aggressive mixed acids, wet chlorine and hypochlorite |
| Hastelloy C22 clad plate | ASTM B575 | Mixed oxidising and reducing acids, and weld overlays |
| Monel 400 clad plate | ASTM B127 | Seawater, hydrofluoric acid and marine service |
| Super Duplex S32760 clad plate | ASTM A240 | Seawater firewater, injection and offshore piping |
| SA-516 Gr 70 clad plate | ASTM A516 Gr 70 · ASME SA-516 | Boilers, pressure vessels and storage tanks |
| SA-387 Gr 11 Cl 2 clad plate | ASTM A387 Gr 11 Cl 2 · ASME SA-387 | Hot, high-pressure reactors and heat exchangers |
Clad plate — questions buyers ask
What is a clad plate?
A clad plate is carbon-steel plate bonded to a corrosion-resistant alloy layer. Clad plate puts a thin alloy layer where the fluid is, on a cheaper carbon-steel base that carries the pressure — often far cheaper than solid alloy for thick vessels.
When is clad plate cheaper than solid alloy?
Usually when the total thickness is well above the corrosion allowance — the thicker the vessel, the bigger the saving.
Which grades are clad plates 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, Super Duplex S32760, SA-516 Gr 70, SA-387 Gr 11 Cl 2.
Which standard covers clad plate dimensions?
ASTM A264 / A265 · ASME SA-264 / SA-265. The material standard depends on the grade.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026