GRADES
Nine families. No closed catalogue.
Every stainless, special alloy or copper grade we trade or have produced belongs to one of these nine metallurgical families. The grades listed on each page are representative examples, not the full extent of what our supply agreements and partner mills can cover.
Austenitic
304/L, 316/L, 316Ti, 321/H, 347H, 317L
Chemical processing · Food processing · Pharmaceuticals · Heat exchangers and piping outside RCC-M scope
Heat-resistant
310/310S, 314, 253 MA, 1.4828, 1.4841
Furnaces · Incineration · Cement plants · Heat treatment · Motorsport exhaust
Ferritic & martensitic
409, 430, 444, 410, 420
Mechanical engineering · Exhaust systems · Wear resistance
Duplex & super duplex
2101, 2304, 2205, 2507, Zeron 100
Brackish water · Seawater · Offshore · Desalination
Super austenitic
904L, 254 SMO, 926
Acids · Desalination · Flue gas treatment
Nickel alloys
600, 625, 800/H/HT, 825, C-276
High temperature · Severe chlorides · Steam generators and heat exchangers
Titanium
Gr 2, Gr 7, Gr 12
Marine condensers · Chlorinated chemical processing · Naval defence
Copper alloys
CuNi 90/10, CuNi 70/30, Laiton amirauté, Bronze
Heat exchangers · Condensers · Sugar refineries · Naval and defence
H-grades and stabilised
304H, 316H, 321H, 347H
Creep resistance · Boilers · Biomass
Frequently asked questions
- Do these nine families really cover every grade that exists?
- Yes: every stainless, special alloy or copper grade belongs to one of these nine metallurgical families. What isn't exhaustive is the examples listed within each family — not the classification itself.
- Why not just list every grade you have available?
- Because a closed list implies the rest isn't available, which would be inaccurate: our European supply agreements and four partner mills cover a wider field than any single page can reasonably enumerate.
- How do I know which family my grade belongs to?
- Each family page lists explicit examples and a table of the most requested grades. If your designation isn't obvious, the guided grade selector or a direct quote request settle the question quickly.
- Do you also supply materials outside stainless, special alloys and copper?
- Occasionally, yes: carbon steel, titanium or other materials, on a specific request — even though it isn't our core business.
- What is SPS's role beyond selling from stock?
- Finding solutions and sourcing material. Most of our orders are covered by our European supply agreements, but tracking down what isn't in them is just as much part of what we do.