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AISI P20
Prehardened
P20 is a chrome-moly tool steel made specifically to fill the requirements for the machined cavaties and forces used in zinc die casting and plastic molding. It is delivered fully quenched and tempered to approximately Brinell 300. Other hardness levels may be obtained through additional heat treatment. P20 composition and structure provide excellent machining and polishing characteristics.
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WEARRESISTANCE |
LowtoMedium |
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TOUGHNESS |
VeryHigh |
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RESISTANCETOSOFTENINGEFFECT OF
ELEVATEDTEMPERATURE |
High |
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DEPTHOFHARDENING |
MediumtoDeep |
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MACHINABILITY |
Medium |
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GRINDABILITY |
Medium |
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DISTORTIONINHEAT TREATING |
Low |
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SAFETY INHARDENING |
High |
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RESISTANCETODECARBURIZATION |
High |
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TYPICAL ANALYSIS |
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Carbon (C) |
0.35 |
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Manganese(Mn) |
0.80 |
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Silicon(Si) |
0.50 |
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Tungsten(W) |
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Molybdenum(Mo) |
0.45 |
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TYPE P20 (UNS T51620) |
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Chromium (Cr) |
1.70 |
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Vanadium (V) |
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Colbalt (Co) |
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Nickel (Ni) |
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AISI T420 Stainless ESR
AISI T420 ESR is an air or oil hardening mold steel having superior internal steel cleanliness combined with good resistance to corrosion. It is suitable width=100% for mold applications and is capable of providing an excellent polished surface. A special re- melting process called Electro Slag Refining or ESR provides a 420 type steel with the very low inclusion content required by mold makers who polish mold surfaces.
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WEARRESISTANCE |
Low |
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TOUGHNESS |
Medium |
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RESISTANCETOSOFTENINGEFFECT OF
ELEVATEDTEMPERATURE |
Good |
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DEPTHOFHARDENING |
Medium |
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MACHINABILITY |
Medium |
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GRINDABILITY |
Good |
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DISTORTIONINHEAT TREATING |
Low |
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SAFETY INHARDENING |
High |
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RESISTANCETODECARBURIZATION |
Medium |
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TYPICAL ANALYSIS |
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Carbon (C) |
Over 0.15 |
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Manganese(Mn) |
1.00 max |
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Silicon(Si) |
1.00 max |
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Tungsten(W) |
.30 max |
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Molybdenum(Mo) |
.30 max |
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TYPE T420 (UNS S42000) |
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Chromium (Cr) |
12.00/14.00 |
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Vanadium (V) |
.30 max |
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Colbalt (Co) |
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Nickel (Ni) |
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