Families & grades (examples)
- Austenitic: 304/304L, 316/316L, 321/347 – general/process; plate ASTM A240, pipe A312, bar A479, forgings A182
- Ferritic: 409/410S/430 – automotive, ducts, low-cost corrosion
- Martensitic: 410/420/431 – blades, wear parts
- Precipitation-hardening: 17-4PH (AISI 630) – high strength, good corrosion; ASTM A564
- Duplex: 2205 (UNS S32205/S31803) – high strength, good chloride resistance; tube ASTM A789, pipe A790
- Super Duplex: 2507 (UNS S32750)/S32760 – PREN > 40, seawater & sour; ASTM A240/A790, NACE MR0175 options
Why it wins: High pitting/crevice resistance (Mo, N), chloride SCC resilience (duplex), weldability (L grades), hygiene finishes.
Finishes & services: 2B, BA, No.4, bead-blast, pickled & passivated, EPS; water-jet/laser, formed parts, cut-to-length.
QA/Testing: PMI, ferrite % (duplex), ASTM A262 intergranular, ASTM G48 pitting (duplex/super duplex), impact at sub-zero on request.
RFQ checklist: Family/grade & standard (e.g., 316L A240), finish, thickness/size, chloride ppm/temp if critical, weldability/impact needs, NACE/duplex tests, doc pack (3.1/3.2).