Classification of Ferrous Weld Metal Analysis for Procedure Qualification
A‐Numbers
Table QW-442
| A‐No. | Types of Weld Deposit | Analysis, % [Note (1)] and [Note (2)] | |||||
| C | Cr | Mo | Ni | Mn | Si | ||
| 1 | Mild Steel | 0.20 | 0.20 | 0.30 | 0.50 | 1.60 | 1.00 |
| 2 | Carbon‐Molybdenum | 0.15 | 0.50 | 0.40–0.65 | 0.50 | 1.60 | 1.00 |
| 3 | Chrome (0.4% to 2%)‐Molybdenum | 0.15 | 0.40–2.00 | 0.40–0.65 | 0.50 | 1.60 | 1.00 |
| 4 | Chrome (2% to 4%)‐Molybdenum | 0.15 | 2.00–4.00 | 0.40–1.50 | 0.50 | 1.60 | 2.00 |
| 5 | Chrome (4% to 10.5%)‐Molybdenum | 0.15 | 4.00–10.50 | 0.40–1.50 | 0.80 | 1.20 | 2.00 |
| 6 | Chrome‐Martensitic | 0.15 | 11.00–15.00 | 0.70 | 0.80 | 2.00 | 1.00 |
| 7 | Chrome‐Ferritic | 0.15 | 11.00–30.00 | 1.00 | 0.80 | 1.00 | 3.00 |
| 8 | Chromium‐Nickel | 0.15 | 14.50–30.00 | 4.00 | 7.50–15.00 | 2.50 | 1.00 |
| 9 | Chromium‐Nickel | 0.30 | 19.00–30.00 | 6.00 | 15.00–37.00 | 2.50 | 1.00 |
| 10 | Nickel to 4% | 0.15 | 0.50 | 0.55 | 0.80–4.00 | 1.70 | 1.00 |
| 11 | Manganese‐Molybdenum | 0.17 | 0.50 | 0.25–0.75 | 0.85 | 1.25–2.25 | 1.00 |
| 12 | Nickel–Chrome—Molybdenum | 0.15 | 1.50 | 0.25–0.80 | 1.25–2.80 | 0.75–2.25 | 1.00 |
NOTES:
(1) Single values shown above are maximum.
(2) Only listed elements are used to determine A-numbers.