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A 540 Grade B21 Class 4
A 540 Grade B21 Class 4 material is SAE A 540/A 540M (2011) Alloy-Steel Bolting Materials for Special Applications Alloy-Steel Bolting Materials for Special Applications.
Chemical composition of A 540 Grade B21 Class 4, A 540 Grade B21 Class 4 mechanical properties, A 540 Grade B21 Class 4 datasheet, A 540 Grade B21 Class 4 equivalent grade, Heat treatment and temperature process of A 540 Grade B21 Class 4.
A 540 Grade B21 Class 4 property sheet
A 540 Grade B21 Class 4 Spec.
| SAE A 540/A 540M (2011) Alloy-Steel Bolting Materials for Special Applications |
Related Materials
Chemical Composition of A 540 Grade B21 Class 4
| C: | Max | 0.05 |
| Si: | Max | 0.20 |
| Mn: | Max | 0.50 |
| P: | Max | Min |
| S: | Max | Min |
| Ni: | Max | remaining |
| Cr: | 15.00 | 17.00 |
| Al: | 4.00 | 5.00 |
| Cu: | Max | Min |
| Ti: | Max | 0.50 |
| Fe: | 2.00 | 4.00 |
| N: | Max | Min |
| Mo: | Max | 0.50 |
| B: | Max | 0.006 |
| Zr: | Max | 0.05 |
Mechanical Properties of A 540 Grade B21 Class 4
| Rp0.2 (MPa) | 718 (≥) |
| Rm (MPa) | 851 (≥) |
| AKV (J) | 31 |
| A (%) | 21 |
| Z (%) | 43 |
| Hardness | HBW 141 |
A 540 Grade B21 Class 4 shape and dimensions
| A 540 Grade B21 Class 4 Round bar: | 1mm-800mm |
| A 540 Grade B21 Class 4 Square bar: | 10mm * 10mm-600mm *600mm |
| A 540 Grade B21 Class 4 Flat bar: | Thickness:8mm-800mm Width:10mm to 1500mm |
| A 540 Grade B21 Class 4 Sheet or Plate: | Thickness:3mm-80mm Width:1.5mm to 1500mm |
| A 540 Grade B21 Class 4 Strip or Coil: | Thickness:0.1mm-3mm Width:1.5mm-1500mm |
| A 540 Grade B21 Class 4 Forgings: | Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes |
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