Insimbi engagqwali (i-SS ngamafuphi) isifinyezo sensimbi engagqwali ne-acid-resistant. Kubizwainsimbi engagqwaliukumelana nemithombo yemali ebolayo ebuthakathaka njengomoya, isitimu, namanzi. Insimbi yokugqwala ibizwa ngokuthi insimbi engamelana ne-asidi. Isakazwa kakhuluukutshala imali(inqubo ye-wax elahlekile), ukukhishwa kwesihlabathi kanye nokwelashwa kokushisa (isixazululo esiqinile) nokwelashwa kwendawo (ukuqhunyiswa kwesibhamu, ukupholisha, i-matte, ibhulashi njll) &Izinsizakalo zemishini ye-CNC, singathela izigaba eziningi zensimbi engagqwali njenge:
- I-Ferritic Stainless Steel,
- I-Martensitic Stainless Steel,
- I-Austenitic Stainless Steel,
- I-Precipitation Hardening (PH) Insimbi Engagqwali
- I-Duplex Stainless Steel(DSS)
- I-Super Duplex Stainless Steel