Steels | Chemical Composition mass % | Ceq1)% | P cm2)% | Measure for Large Heat Input Welding |
|||||
---|---|---|---|---|---|---|---|---|---|
C | Si | Mn | Cu | Cr | Ni | ||||
Developed Steel | 0.09 | 0.30 | 0.96 | 0.33 | 0.52 | 0.21 | 0.37 | 0.19 | Ti Treatment |
Conventional Steel | 0.12 | 0.30 | 1.10 | 0.36 | 0.50 | 0.19 | 0.42 | 0.23 | − |
1) Ceq(%)=C+Mn/6+Si/24+Ni/40+Cr/5+Mo/4+V/14
2) Pcm(%)=C+Si/30+Mn/20+Cu/20+Ni/60+Cr/20+Mo/15+V/10+5B
Steels | Plate Thickness mm |
Mechanical Properties | ||
---|---|---|---|---|
YP N/mm2 |
TS N/mm2 |
vE0 J |
||
Developed Steel |
22 | 423 | 531 | 342 |
50 | 424 | 528 | 337 | |
Conventional Steel |
22 | 387 | 512 | 359 |
50 | 425 | 520 | 312 |
Steels | Plate Thickness mm |
Weldability 3) | Mechanical Properties of Welded Joints | ||||
---|---|---|---|---|---|---|---|
Preheat Temperature |
Welding Method |
Heat Input kJ/mm |
Tensile Strength |
Charpy V-notch Impact properties |
|||
TS N/mm2 |
Notch Location |
vE0 J |
|||||
Developed Steel |
22 | No Crack at 25°C |
Electro Gas Arc |
14.3 | 534 | HAZ1mm | 114 |
50 | No Crack at 25°C |
CO2 Gas Arc |
3.3 | 578 | HAZ1mm | 282 | |
Conventional Steel |
22 | No Crack at 25°C |
Electro Gas Arc |
14.6 | 528 | HAZ1mm | 51 |
50 | No Crack at 25°C |
− | − | − | − | − |
3) y-groove weld cracking test