PH15-7Mo (632 type) national standard 0Cr15Ni7Mo2Al, Japan SUS632, is a steel grade developed with 2% molybdenum instead of 2% chromium in 0Cr17Ni7Al steel. Its basic properties are similar to 0Cr17Ni7Al steel, but its comprehensive properties are better. In the austenite state, it can withstand various cold forming and welding processes. After heat treatment, the highest strength can be obtained; it has excellent high temperature strength below 550°C. Used in the manufacture of thin-walled structural parts for aviation, various containers, pipelines, springs, valve membranes, ship shafts, compressor discs, reactor parts, and various chemical equipment and other structural parts.
Chemistry Typical
Carbon: 0.090 max
Manganese: 1.00 max
Silicon: 1.00 max
Chromium: 14.00-16.00
Nickel: 6.50- 7.75
Molybdenum: 2.00-3.00
Aluminum: 0.75-1.50
Phosphorus: 0.040 max
Sulfur: 0.040 max
Iron: Balance
Hardness: HRC 38
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