Heat Treating

Heat Treating (HM25MX)

Location: Bethlehem, PA 18015 Northampton County
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Country: United States of America
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N 40° 36.902', W 75° 21.851'

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Inscription

The High House

What is Heat Treating?
If you look towards the bridge to your left, you can see a tall and narrow building. This is the High House, or No. 3 Treatment Facility. Its tall shape accommodates the heat treating process, where gun barrels and other long steel pieces were heated and cooled to improve the metal's properties. Annealing, a type of heat treating, softens the steel, relieves internal stresses, and improves the grain. The result is a better combination of strength, elasticity, and plasticity.
1 Each piece is placed in a vertical furnace and heated. Excess gases from the blast furnaces are burned as the fuel source for this heat. The steel must stay at temperature for several hours.
2 Workers "quench" or cool the steel quickly in water or oil. The steel's properties change depending on how fast a piece is cooled.
3 The High House was designed to accommodate the addition of heated steel housing components to the gun barrel to insure a secure fit when the heated components cooled and shrank in place.
Details
HM NumberHM25MX
Tags
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Placed BySteelStacks
Marker ConditionNo reports yet
Date Added Saturday, February 24th, 2018 at 7:01pm PST -08:00
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Locationbig map
UTM (WGS84 Datum)18T E 469194 N 4496087
Decimal Degrees40.61503333, -75.36418333
Degrees and Decimal MinutesN 40° 36.902', W 75° 21.851'
Degrees, Minutes and Seconds40° 36' 54.12" N, 75° 21' 51.06" W
Driving DirectionsGoogle Maps
Area Code(s)484, 610
Closest Postal AddressAt or near HMT, Bethlehem PA 18015, US
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