Preheat requirements:
AWS D 1.1
|
Category
|
Sample materials
|
Thickness (mm)
|
Preheat (°C)
|
| A | A36, A106Gr B, A 516, API 5L Gr B, API 5L X42 SMAW with other than low- hydrogen electrodes | 3 – 20 >20 to 38 >38 to 65 > 65 0 |
0 65 110 150 |
| B | A36, A106Gr B, A516, API 5L Gr B, API 5L X42SMAW with low- hydrogen electrodes, SAW, GMAW, FCAW |
3 – 20 >20 to 38 >38 to 65 > 65 0 |
0 10 65 110 |
| C | API 2W Grade 60, API 2Y Grade 60 API 5L Grade X52SMAW with low- hydrogen electrodes, SAW, GMAW, FCAW |
3 – 20 >20 to 38 >38 to 65 > 65 |
0 65 110 150 |
| D | ASTM A 710 Grade A (All classes) ASTM A 913 Grades 50,SMAW, SAW, GMAW, and FCAW with electrodes or electrode- flux combinations capable of depositing weld metal with a maximum diffusible hydrogen content of 8 ml/ 100 g (H8), when tested in accordance with AWS A4.3. |
All thickness > = 3mm | 0 |