AISI W2
AISI W2
W2 is a water-hardening tool steel that produces a finer grain size, greater uniformity, and higher toughness than other types of water-hardening tool steels. Its popularity is attributed to ready availability, low cost, excellent machinability, suitability for short run tooling and, perhaps of most importance, its shallow hardenability or depth of hardening.
The Importance of close hardenability control availability in W2 cannot be over emphasized.
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TYPICAL ANALYSIS
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Type W2 (T27302)
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Carbon
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.85 – 1.50
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Manganese
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.10 - .40
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Silicon
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.10 - .40
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Tungsten
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.15 MAX
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Molybdenum
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.10 MAX
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Chromium
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.15 MAX
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Vanadium
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.15 - .35
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Nickel
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.20 MAX
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FORGING
Start forging at
Do not forge below
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1800-1950° F (982-1066° C)
1500° F (816° C)
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NORMALIZING
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1450-1700° F (788-927° C)
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ANNEALING
Temperature
Rate of cooling, max. per hour
Typical annealed hardness, Brinell
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1360-1450° F (738-788° C)
40° F (22° C)
156-201
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HARDENING
Rate of heating
Hardening temperature
Time at temperature, minutes
Quenching medium
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Slowly
1400-1550° F (760-843° C)
10-30
B or W
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TEMPERING
Tempering temperature
Approx. tempered hardness, Rockwell C
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350-650° F (177-343° C)
50-64
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WEAR RESISTANCE
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Low to Medium
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TOUGHNESS
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High
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RESISTANCE TO SOFTENING EFFECT OF ELEVATED TEMPERATURE
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Low
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DEPTH OF HARDENING
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Shallow
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MACHINABILITY
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Highest
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GRINDABILITY
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Highest
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DISTORTION IN HEAT TREATING
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High
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SAFETY IN HARDENING
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Low to Medium
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RESISTANCE TO DECARBURIZATION
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Highest
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