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钛及钛合金加工产品的化学成分及成分允许偏差(摘自GB/T 3620.2-1994)
注：当铁元素为杂质时，其偏差只取正偏差。
| 元素 | 化学成分的质量分数（%） | 允许偏差（%） |
|---|---|---|
| C | ≤0.20 | +0.02 |
| C | ＞0.20～0.50 | +0.04 |
| C | ＞0.50 | +0.06 |
| N | ≤0.10 | +0.02 |
| H | ≤0.020 | +0.002 |
| O | ≤0.20 | +0.03 |
| O | ＞0.20 | +0.04 |
| Fe | ≤0.25 | ±0.10 |
| Fe | ＞0.25～0.50 | ±0.15 |
| Fe | ＞0.50～5.00 | ±0.20 |
| Fe | ＞5.00 | ±0.25 |
| Si | ≤0.10 | ±0.02 |
| Si | ＞0.10～0.50 | ±0.05 |
| Si | ＞0.50～0.70 | ±0.07 |
| Al | ≤1.00 | ±0.15 |
| Al | ＞1.00～10.00 | ±0.40 |
| Al | ＞10.00～35.00 | ±0.50 |
| Cr | ≤1.00 | ±0.08 |
| Cr | ＞1.00～4.00 | ±0.20 |
| Cr | ＞4.00 | ±0.25 |
| Mo | ≤1.00 | ±0.08 |
| Mo | ＞1.00～10.00 | ±0.30 |
| Mo | ＞10.00～30.00 | ±0.40 |
| Sn | ≤3.00 | ±0.15 |
| Sn | ＞3.00～6.00 | ±0.25 |
| Sn | ＞6.00～12.00 | ±0.40 |
| Mn | ≤0.30 | ±0.10 |
| Mn | ＞0.30～6.00 | ±0.30 |
| Mn | ＞6.00～9.00 | ±0.40 |
| Mn | ＞9.00～20.00 | ±0.50 |
| Cu | ≤1.00 | ±0.08 |
| Cu | ＞1.00～3.00 | ±0.12 |
| Cu | ＞3.00～5.00 | ±0.20 |
| V | ≤0.50 | ±0.05 |
| V | ＞0.50～5.00 | ±0.15 |
| V | ＞5.00～6.00 | ±0.20 |
| V | ＞6.00～10.00 | ±0.30 |
| V | ＞10.00～20.00 | ±0.40 |
| B | ≤0.005 | ±0.001 |
| Zr | ≤4.00 | ±0.15 |
| Zr | ＞4.00～6.00 | ±0.20 |
| Zr | ＞6.00～10.00 | ±0.30 |
| Zr | ＞10.00 | ±0.40 |
| Ni | ≤1.00 | ±0.03 |
| Pd | ≤0.250 | ±0.02 |
| Nb | ≤1.00 | ±0.10 |
| Nb | ＞1.00～5.00 | ±0.15 |
| Nb | ＞5.00～7.00 | ±0.20 |
| Nb | ＞7.00～10.00 | ±0.25 |
| Nb | ＞10.00～15.00 | ±0.30 |
| Nb | ＞15.00～20.00 | ±0.35 |
| Nb | ＞20.00～30.00 | ±0.40 |
| 其他元素(单一) | ≤0.1 | +0.02 |
