Common welding material drying temperature and holding time
| Type | Grade | Low-temperature steel welding rod. | Time (h) |
| Carbon steel and low alloy steel welding rod. | J422 | 150 | l |
| J426 | 300 | 1 | |
| J427 | 350 | 1 | |
| J502 | 150 | 1 | |
| J506 J507 | 350 | 1 | |
| J506RH J507RH | 350～430 | l | |
| J507MoW | 350 | 1 | |
| J557 | 350 | 1 | |
| J556RH | 400 | l | |
| J606 J607 | 350 | 1 | |
| J607RH | 350～430 | 1 | |
| J707 | 350 | 1 | |
| J707RH | 400 | 2 | |
| Low temperature steel welding rod. | W607 W707 | 350 | 1 |
| Molybdenum and chromoly heat-resistant steel welding rod | R207 R307 | 350 | l |
| R307H | 400 | 1 | |
| R317 R407 R507 | 350 | 1 | |
| Chromium-nickel stainless steel welding rod | A102 | 150 | 1 |
| A107 | 250 | 1 | |
| A132 | 150 | 1 | |
| A137 | 250 | 1 | |
| A202 | 150 | 1 | |
| A207 | 250 | l | |
| A002 A022 A212 A242 | 150 | 1 |
Recommended preheating temperature for common steel grades
| Steel grade | Thickness (mm) | Preheating temperature, (℃) |
| 20G 20 20R 20g | 30~50 | ≥50 |
| ＞50~100 | ≥100 | |
| 100 | ≥150 | |
| 16MnD 09MnNiD16MnDR 09MnNiDR15MnNiDR | ≥30 | ≥50 |
| 16Mn 16MnR15MnVR 15MnNbR | 30~50 | ≥100 |
| ＞50 | ≥150 | |
| 20MnMo 20MnMoD 08MnNiCrMoVD | Any thickness | ≥100 |
| 07MnCrMoVR 07MnNiCrMoVDR | 16~30 | ≥60 |
| ＞30~40 | ≥80 | |
| ＞40~50 | ≥100 | |
| 13MnNiMoNbR | Any thickness | ≥150 |
| 18MnMoNbR | ≥180 | |
| 20MnMoNb | Any thickness | ≥200 |
| 12CrMo 15CrMo12CrMoG 15CrMoR15CrMoG | ＞10 | ≥150 |
| 12CrlMoV 12CrlMoVG 14CrlMoR 14CrlMo 12Cr2Mo 12Cr2M01 12Cr2MoG 12Cr2M01R | ＞6 | ≥200 |
| 1Cr5Mo | Any thickness | ≥250 |
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