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Grade T420
Type 420 is a martensitic chrome steel capable of hardening to a maximum of approximately 500 Brinell. It has its optimum corrosion resisting qualities in the hardened and tempered condition. Type 420 is magnetic in all conditions.
TYPICAL APPLICATIONS
Flatware knife blades, glass molds, hand tools, vegetable choppers.
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TYPICAL ANALYSIS |
420 |
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Chrome |
12.00-14.00 |
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Carbon |
.15 MIN. |
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Manganese |
1.0 MAX. |
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Silicon |
1.0 MAX. |
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Molybdenum |
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Other |
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MECHANICAL PROPERTIES (ANNEALED)
BRINELL HARDNESS |
195 |
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TENSILE—KSI |
95 |
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YIELD—KSI |
50 |
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ELONGATION IN 2-% |
25 |
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RED. IN AREA-% MIN |
55 |
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WELDING
CHARACTERISTICS |
Fair - Preheat 400°-500°
Anneal at 1300°
after welding |
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MACHINING
COMPARED TO B1112
SCREW STOCK |
54% |
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SPECIFICATIONS
AISI |
420 (RAR)
420 |
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ASTM |
A276 |
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AMS |
5621 |
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QQS |
763 |
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