Chemical Composition of SS Buttweld Fittings
| SMO 254 | Ni | C | Mo | Mn | Si | Fe | Cu | S | P | Cr |
|---|---|---|---|---|---|---|---|---|---|---|
| 17.5 – 18.5 | 0.02 max | 6 – 6.5 | 1 max | 0.8 max | – | 0.5 – 1 | 0.01 max | 0.03 max | 19.5 – 20.5 |
Chemical Composition of SS Forged Fittings
| Grade | Ni | Cr | Mo | Cu | N | C | Mn | Si | P | S |
|---|---|---|---|---|---|---|---|---|---|---|
| SMO 254 | 17.5-18.5 | 19.5-20.5 | 6-6.5 | 0.5-1 | 0.18-0.22 | 0.02 | 1 | .08 | 0.03 | 0.01 |
Chemical Composition of SS Flanges
| Grade | C | Mn | Si | Cu | S | P | Mo | Ni | Cr |
|---|---|---|---|---|---|---|---|---|---|
| SMO 254 | 0.02 | 1 | 0.08 | 0.5-1.0 | 0.01 | 0.03 | 6.0-6.5 | 17.5-18.5 | 19.5-20.5 |
Mechanical Properties of SS Butt weld Pipe Fittings
| Density | Melting Point | Yield Strength (0.2%Offset) | Tensile Strength | Elongation |
|---|---|---|---|---|
| 8.0 g/cm3 | 1320-1390 ℃ | 300 | 650 | 35 % |
Mechanical Properties of SS Forged Fittings
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|
| 8.0 g/cm3 | 1320-1390 ℃ | 650 | 300 | 35 % |
Mechanical Properties of SS Flanges
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
|---|---|---|---|---|
| 8 g/cm3 | 1320-1390 ℃ | 650 | 300 | 35 % |
Equivalent Grades of Flanges
| STANDARD | UNS | WERKSTOFF NR. | AFNOR | EN | JIS | SIS | GOST |
|---|---|---|---|---|---|---|---|
| SMO 254 | S31254 | 1.4547 | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 | – | 2378 | – |
Equivalent Grades of Forge Fitting
| STANDARD | WERKSTOFF NR. | UNS | SIS | AFNOR | EN |
|---|---|---|---|---|---|
| SMO 254 | 1.4547 | S31254 | 2378 | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 |
Equivalent Grades of Buttweld Fitting
| STANDARD | WERKSTOFF NR. | UNS | SIS | BS | GOST | AFNOR | EN |
|---|---|---|---|---|---|---|---|
| SMO 254 | 1.4547 | S31254 | 2378 | – | – | Z1 CNDU 20.18.06Az | X1CrNiMoCuN20-18-7 |