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Grade 440C
Type 440C is a martensitic chrome steel that is capable of acquiring, upon heat treatment, the highest hardness of any type of corrosion resisting steels. It has its optimum corrosion resisting qualities in the hardened and tempered condition and is magnetic in all conditions.
TYPICAL APPLICATIONS
Instrument bearings, nozzles, steel balls and seats for oil well pumps, valve parts.
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TYPICAL ANALYSIS |
440C |
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Chrome |
16.00-18.00 |
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Nickel |
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Carbon |
.95-1.20 |
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Manganese |
1.0 MAX. |
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Silicon |
1.0 MAX. |
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Molybdenum |
.75 MAX. |
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Other |
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MECHANICAL PROPERTIES (ANNEALED)
BRINELL HARDNESS |
230 |
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TENSILE—KSI |
110 |
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YIELD—KSI |
65 |
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ELONGATION IN 2-% |
14 |
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RED. IN AREA-% MIN |
25 |
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WELDING
CHARACTERISTICS |
Not recommended |
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MACHINING
COMPARED TO B1112
SCREW STOCK |
30% |
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SPECIFICATIONS
AISI |
440C (RAR)
440C |
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ASTM |
A276, A580 |
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AMS |
5630 |
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QQS |
763 |
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