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Grade | ELEMENT COMPOSITION , % | ||||||||
Ti | AL | V | Fe | C | N | H | O | Others,max | |
Grade 1 | Balance | - | - | 0.20 | 0.08 | 0.03 | 0.015 | 0.18 | 0.40 |
Grade 2 | Balance | - | - | 0.30 | 0.08 | 0.03 | 0.015 | 0.25 | 0.40 |
Grade 3 | Balance | - | - | 0.30 | 0.08 | 0.05 | 0.015 | 0.35 | 0.40 |
Grade 4 | Balance | - | - | 0.50 | 0.08 | 0.05 | 0.015 | 0.40 | 0.40 |
Grade 5 | Balance | 5.5-6.75 | 3.5-4.5 | 0.40 | 0.08 | 0.05 | 0.015 | 0.50 | 0.40 |
Grade 7 | Balance | 0.30 | 0.08 | 0.03 | 0.015 | 0.25 | 0.40 | ||
Grade 9 | Balance | 0.25 | 0.08 | 0.03 | 0.015 | 0.15 | 0.40 | ||
Grade 12 | Balance | 0.30 | 0.08 | 0.03 | 0.015 | 0.25 | 0.40 |