|
no. --- Carbon | Manganese | | | Chromium |
|(minimum and|(minimum and|Phosphorus|Sulphur |(minimum and| Heat
| maximum) | maximum) |(maximum) |(maximum)| maximum) |treatment
---------|------------|------------|----------|---------|------------|---------
5,120 |0.15 to 0.25| * | 0.04 | 0.045 |0.65 to 0.85| B
5,140 |0.35 to 0.45| * | 0.04 | 0.045 |0.65 to 0.85| H or D
5,165 |0.60 to 0.70| * | 0.04 | 0.045 |0.65 to 0.85| H or D
| | | | | |
5,195 |0.90 to 1.05|0.20 to 0.45| 0.03 | 0.03 |0.90 to 1.10|M, P or R
51,120 |1.10 to 1.30|0.20 to 0.45| 0.03 | 0.03 |0.90 to 1.10|M, P or R
5,295 |0.90 to 1.05|0.20 to 0.45| 0.03 | 0.03 |1.10 to 1.30|M, P or R
52,120 |1.10 to 1.30|0.20 to 0.45| 0.03 | 0.03 |1.10 to 1.30|M, P or R
-------------------------------------------------------------------------------
--Two types of steel are available in this class, one with manganese 0.25
to 0.50 per cent (0.35 per cent desired), and silicon not over 0.20 per
cent; the other with manganese 0.60 to 0.80 per cent (0.70 per cent
desired), and silicon 0.15 to 0.50 per cent.

TABLE 9.--CHROMIUM-VANADIUM STEELS
-------------------------------------------------------------------------------
S. A. E. | | |Phosphorus| Sulphur | |Vanadium |
Specification| | | (maximum)|(maximum)| |(minimum)|
no. ------ | -- | / - |
| Carbon | Manganese | | | Chromium | | Heat
|(minimum and|(minimum and| | |(minimum and| |treatment
| maximum) | maximum) | | | maximum) | |
------|------------|------------|-------|-------|------------|-------|---------
6,120 |0.15 to 0.25|0.50 to 0.80| 0.04 | 0.04 |0.80 to 1.10| 0.15 | S
6,125 |0.20 to 0.30|0.50 to 0.80| 0.04 | 0.04 |0.80 to 1.10| 0.15 | S or T
6,130 |0.25 to 0.35|0.50 to 0.80| 0.04 | 0.04 |0.80 to 1.10| 0.15 | T or U
6,135 |0.30 to 0.40|0.50 to 0.80| 0.04 | 0.04 |0.80 to 1.10| 0.15 | T or U
6,140 |0.35 to 0.45|0.50 to 0.80| 0.04 | 0.04 |0.80 to 1.10| 0.15 | T or U
6,145 |0.40 to 0.50|0.50 to 0.80| 0.04 | 0.04 |0.80 to 1.10| 0.15 | U
6,150 |0.45 to 0.55|0.50 to 0.80| 0.04 | 0.04 |0.80 to 1.10| 0.15 |