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Specials

Special products: Demolition and Construction Blades

Subject to material availability Sheffield Gauge Plate Limited are able to offer “Special” dimensions and lengths based on the following parameters:

Precision Finish – Imperial range sizes and tolerances

Minimum Width: ¼” Tolerances
Maximum Width: 16″ (supplied with sawn edges) +0.005″ / -nil
Minimum Thickness: 1/32″ Tolerances
Maximum Thickness: 2″ +/-0.001″

Precision Finish – Metric range sizes and tolerances

Minimum Width: 5mm Tolerances
Maximum Width: 406mm (supplied with sawn edges) +0.2mm / -nil
Minimum Thickness: 1mm Tolerances
Maximum Thickness: 50mm +0.05mm / -nil

Rotary Ground Finish – Imperial range sizes and tolerances

Minimum Width: ¼” Tolerances
Maximum Width: 18″ (supplied with sawn edges) +0.015″ / +0.025″
Minimum Thickness: 1/32″ Tolerances
Maximum Thickness: 2″ +0.015″ / +0.025″

Rotary Ground Finish – Metric range sizes and tolerances

Minimum Width: 5mm Tolerances
Maximum Width: 457mm (supplied with sawn edges) +0.4mm / +0.8mm
Minimum Thickness: 1mm Tolerances
Maximum Thickness: 50mm +0.4mm / +0.8mm

Alternative Tolerances are available on [request]

Any lengths shorter than the standard 18″ or 500mm can be discussed at the time of enquiry, maximum length – 144″ / 3657mm dependent on material availability.

WE ARE ABLE TO MANUFACTURE ANY QUANTITY, HOWEVER PRICES WILL VARY SUBJECT TO OPTIMUM USE OF MACHINES AND MATERIALS.
HEAT TREATMENT

Hardening

To achieve the optimum hardness, preheat the material slowly, preferably in a salt bath or a controlled atmosphere furnace to 300 / 500 C. Soak thoroughly for approximately 30 minutes. Continue to heat to 780 / 820 C. Soak for a minimum of 15 minutes.

(Please Note: All temperatures and soaking times require adjusting according to the size and complexity of the section.)
Quench in Oil until cool to touch.

Tempering

To obtain the following hardness results, hold at appropriate temperature for 1 hour per inch of thickness.

All the above figures including the graph are intended as guidelines only, as times and temperatures are dependent on the technique and equipment used.