Austenitic stainless steel
Alloy 20 / 2.4660 stainless steel
Alloy 20 / 2.4660 is Ni-Fe-Cr-Cu-Mo for sulphuric acid. 20Cb-3 is the older name.
- Delivery conditions
- solution annealed
- Also known as
- 2.4660, NiCr20CuMo, N08020, 20Cb-3
Designations
- W.Nr.
- 2.4660
- EN standard
- NiCr20CuMo
- Group
- Stainless steel
What it is used for
Acid pipe and fittings in chemical process.
Limits
904L or Alloy 31 when stainless/austenite is enough.
Delivery
We source Alloy 20 from European mill partners as round bar, plate, flat bar, seamless tube, welded tube, cut to your dimensions and ship the certificate with the material. Typical condition: solution annealed. Standard: NiCr20CuMo. From a single cut piece to larger lots — with no minimum charge, so you do not have to buy a full commercial length to get what you need.
Certificates and documentation
Alloy 20 can be supplied with a material certificate to EN 10204, depending on producer, dimension and the requirements specified for the delivery. On stainless, the analysis and the delivery condition are what the certificate shows. If a specific test or an ageing/hardening condition is to be documented, it must be specified before we order. EN 10204 3.1 can be supplied on a wide range of our materials.
Dimension programme
| Form | Range | Note |
|---|---|---|
| Round bar | Ø8–200 mm | Solution annealed unless otherwise stated on the PO. |
| Flat bar | Cut to order | Stainless flat. |
| Plate | 2–50 mm thickness | State thickness and finish. |
| Seamless tube | Ø13.5–Ø508 mm | DN8–DN500. Wall up to 31 mm. ASME 1/4–16″. |
| Welded tube | Ø21.3–Ø610 mm | Welded stainless. Wall to ISO 1127. State whether the weld seam must be documented. |
| Fittings | Ø12–Ø2000 mm | ASME 1/2–60″ (Ø15–Ø1524 mm). Type A and B. Not a stock statement. |
| Flanges | Ø14–Ø2000 mm | ASME 1/2–60″ (Ø15–Ø1524 mm). PN 6–400. Not a stock statement. |
The range is a delivery programme, not a stock statement. Length is cut to your drawing.
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Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.