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W-1

W-1 Water Hardening Tool Steel

W-1 is a water-hardening tool steel that is easy to machine. Its high carbon content allows it to develop a keen cutting edge. It has a moderate wear resistance.

Analysis:


C

CO

CR

MN

MO

NI

P

S

SI

V

W
0.70 – 1.500.15 Max.0.10 – 0.400.10 Max.0.10 – 0.400.10 Max.0.15 Max.

Size Availability:

Flats • Hollowbar • Metric • Non-Standard • Rounds • Squares • Standard

Applications:

Blanking DiesCartridge DiesCircular Cutters
Draw DiesDriftsDrills
Engraving StampsForming DiesGauges
Jeweler DiesKnurling ToolsPaper Knives
PunchesReamersStriking Dies
TapsThreading DiesWood Knives

Designations:

ASTM A686-US
SAE J437 (W108)-US
SAE J437 (W109)-US
SAE J437 (W112)-US
SAE J437 (WhO)-US
SAE J438 (W108)-US
SAE J438 (W109)-US
SAE J438 (W110)-US
SAE J438 (W112)-US
UNS T72301-US
AISI W1 Tool Steel-US

TreatmentTemperature RangeCooling/QuenchingNotes
Forging1700-1900° FIn air.Heat slowly to maximum temperature. Forging should begin as soon as the section is uniformly heated through.
Annealing1400-1450° FCool slowly in the furnace at a maximum rate of 50° F per hours..Protect against surface decarburization by pack-annealing. Hold at temperature for 1 hour.
Stress Relieving1200-1250° FCool slowly in air.Stress relieve after rough machining
Preheating 1200-1250° FPreheat time in furnace is ¾ Hr. per inch of thickness
Hardening1375-1450° FIn water or in a brine solution.Small tools or parts may be heated in molten lead or in a salt bath. Soak time is 10 minutes per inch of thickness. Minimum of 30 minutes.
TemperingTemper immediately after hardening and quenching. Recommended temperature is 350-550° F.
Data is typical and should not be construed as actual values for any category.
Applications and technical information require engineers and tool designers to exercise independent judgement.

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