Stainless steel
1.4547 / S31254 stainless steel
1.4547 is a 6 % Mo austenitic stainless steel, EN X1CrNiMoCuN20-18-7, UNS S31254. Nitrogen and high molybdenum give a PREN above 904L. INDUSTRISTÅL supplies bar and plate with 3.1. Super duplex when the strength also has to go up. 904L when 6 % Mo is more than the task calls for.
Typical applications
- Offshore and desalination
- Strong chloride
- Process
Delivery conditions
- solution annealed
Designations
- W.Nr.
- 1.4547
- EN standard
- X1CrNiMoCuN20-18-7
- AISI/SAE
- 254SMO
- SS (Sweden)
- 2378
- UNS
- S31254
- Group
- Stainless steel
Machinability and weldability
Yes, with filler for 6 % Mo. Not 316 wire.
Sawing and machining
Sawing and cutting to size. State the form.
Certificates and documentation
EN 10204 3.1. PREN only when the certificate contains it.
Dimension programme
| Form | Range | Note |
|---|---|---|
| Round bar | Ø20–120 mm | Per job. |
| Flat bar | Cut to order | Stainless flat. |
| Plate | 3–30 mm thickness | 6Mo. State Ø or thickness. |
| 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. |
Parts of the range are held by European partners; other dimensions can be sourced. The range is not a current stock status in every diameter — stock is confirmed on enquiry.
Frequently asked questions
- What is 1.4547?
- 6 % Mo austenite S31254. Higher PREN than 904L.
- 1.4547 or 904L?
- 904L first. 1.4547 when the chloride calls for 6 % Mo.
- Do you supply 1.4547?
- Yes, to order. State the form and dimension.
Read more
Send your enquiry
State grade, dimensions and quantity — or attach a drawing. We reply with a quote.