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In ChinaA 646 Grade 300M material is SAE A 646/A 646M (2011) Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings.
Chemical composition of A 646 Grade 300M, A 646 Grade 300M mechanical properties, A 646 Grade 300M datasheet, A 646 Grade 300M equivalent grade, Heat treatment and temperature process of A 646 Grade 300M.
| SAE A 646/A 646M (2011) Premium Quality Alloy Steel Blooms and Billets for Aircraft and Aerospace Forgings |
| 300M |
| A 646 Grade 300M |
| Grade 1300 M |
| C: | Max | 0.40 |
| Si: | Max | 1.60 |
| Mn: | Max | 0.75 |
| P: | Max | Min |
| S: | Max | Min |
| Ni: | Max | 0.40 |
| Cr: | Max | 1.85 |
| Al: | Max | Min |
| Cu: | Max | Min |
| Ti: | Max | Min |
| Fe: | Max | remaining |
| N: | Max | Min |
| Mo: | Max | Min |
| V: | Max | 0.08 |
| Rp0.2 (MPa) | 188 (≥) |
| Rm (MPa) | 132 (≥) |
| AKV (J) | 21 |
| A (%) | 24 |
| Z (%) | 33 |
| Hardness | HBW 312 |
| A 646 Grade 300M Round bar: | 1mm-800mm |
| A 646 Grade 300M Square bar: | 10mm * 10mm-600mm *600mm |
| A 646 Grade 300M Flat bar: | Thickness:8mm-800mm Width:10mm to 1500mm |
| A 646 Grade 300M Sheet or Plate: | Thickness:3mm-80mm Width:1.5mm to 1500mm |
| A 646 Grade 300M Strip or Coil: | Thickness:0.1mm-3mm Width:1.5mm-1500mm |
| A 646 Grade 300M Forgings: | Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes |