| Steel grade | Standard | Application |
|---|---|---|
| STR4 | KS | KS standard martensite heat resistant steel |
| STR3 | KS | KS standard martensite heat resistant steel |
| STRl | KS | KS standard martensite heat resistant steel |
| STR446 | KS | KS standard ferrite heat resistant steel |
| STR661 | KS | KS standard austenitic heat resistant steel |
| STR660 | KS | KS standard austenitic heat resistant steel |
| STR330 | KS | KS standard austenitic heat resistant steel |
| STR310 | KS | KS standard austenitic heat resistant steel |
| STR309 | KS | KS standard austenitic heat resistant steel |
| STR38 | KS | KS standard austenitic heat resistant steel |
| STR37 | KS | KS standard austenitic heat resistant steel |
| STR36 | KS | KS standard austenitic heat resistant steel |
| STR35 | KS | KS standard austenitic heat resistant steel |
| STR31 | KS | KS standard austenitic heat resistant steel |
| STS430TKC | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS430TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS420J2TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS420J1TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS410TKC | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS410TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS347TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS321TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS316TKC | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS316TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS304TKC | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS304TKA | KS | KS standard mechanical and structure with stainless steel pipe(KS D3536-1992) |
| STS317J4L | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS317J1 | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS317L | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS317 | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS316J1L | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS316J1 | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS316Ti | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS316LN | KS | KS standard austenite stainless steel bars(KS D3706-1992) |
| STS316L | KS | KS standard austenite stainless steel bars(KS D3706-1992) |