Gauge Plate

Precise arena apparatus steel and barometer bowl for the discerning, able toolmaker

Gauge bowl (also accustomed as arena collapsed stock) stockholders and suppliers, carrying to the accomplished of the India. Kohli Adamant banal barometer bowl in casting O1 apparatus steel; we can aswell aftermath non accustomed sizes. If an accession casting is adapted we can accomplish barometer bowl in accession blueprint such as D2, D3, EN8 and abundant added types. Supplied absolutely annealed, barometer bowl is attention arena to abutting tolerances, enabling accomplished apparatus to be produced with the minimum of machining. O1 barometer bowl is calefaction treatable to a top hardness, it possesses acceptable hardenability with accomplished dimensional adherence and attrition to wear.

We acceptable consign enquiries for barometer bowl / arena collapsed stock. Acquaintance our sales appointment and argue our shipping policy for added details.

Related Specifications

DIN 17350 BS EN ISO 4957 ASTM A681

Form of Supply

Gauge plate / ground flat stock metric sizes are available in 500mm and 1000mm lengths. Imperial sizes are available in 18″ and 36″ lengths. Standard and non standard sizes are available.

We stock 405mm and 505mm wide in addition to our wide range of sizes up to 300mm.

Subject to size suitability and availability non standard gauge plate / ground flat stock sizes can be produced in approximately 2 to 3 weeks.

Plate

Flat

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Applications

Gauge Plate is suitable for a wide range of applications including gauges, punches, dies, jigs, machine knives and parts.

O1 Typical Analysis

Carbon	0.95%	Manganese	1.25%
Chromium	0.50%	Tungsten	0.50%
Vanadium	0.20%

Tolerances

Metric:	Imperial:
Thickness +0.05mm/-0.00mm	Thickness +0.001”/-0.001”
Width +0.20mm/-0.00mm	Width +0/005”-0.000”
Length +3mm/-0mm	Length +1/8”/-0”

Hardening

Heat the O1 gauge plate component slowly and if possible pre heat at 300-500°C before increasing to the hardening temperature of 780-820°C. Pre heating is highly recommended for complex sections. Soak the component thoroughly allowing thirty minutes per 25mm of ruling section before quenching. Light section tools should be quenched in oil from the lower end of the hardening temperature range. Tempering the heat treated tool is always necessary after hardening.

Martempering

Martempering of O1 gauge plate is an alternative hardening process which may be used when suitable salt bath equipment is available. With this method internal strain, distortion and risk of quench cracking are reduced to a minimum.

Pre heat the gauge plate tool at 360°C then raise to 800°C for sections 3mm thick or less, or to 820°C for sections over 3mm thick. Soak the component according to section then quench into molten salt, held at 210°C. Allow sufficient time for the centre of the tool to reach bath temperature, withdraw and cool in the air. Tempering of the tool will then be necessary.

Hardening the O1 gauge plate component from a neutral salt bath, will reduce the possibility of scaling or decarburisation. Heat the component to 830-850°C and after equalisation quench in oil.

Tempering

Tempering is recommended between 100-350°C. Soak the tool well at the selected temperature and soak for at least one hour per 25mm of total thickness.

Temperature [°C]	100	150	200	250	300	350
Hardness [HRc]	64-63	63-62	62-61	60-59	58-57	56-55

Heat Treatment

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each ground flat stock / gauge plate component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of tool steels.