Sheffield Gauge Plate Ltd. - Sheffields Leading Supplier of Precision Ground Tool Steels

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Gauge Plate products: Technical data

Uses of Ground Flat Stock

Tool Steel O1 is a medium alloyed oil hardening steel with excellent cutting force and toughness, the excellent dimensional stability reduces distortion and the possibility of cracking during heat treatment.

Supplied in the annealed condition, the precision tolerances minimise additional costly tool room machining.

Ground Flat Stock provides toolmakers with a decarburization free surface, plus a high wear resistance after heat treatment, making it ideal for a multitude of uses and applications: dies, press tools, punches, gauges, cams, jigs, machine knives and marking devices, and tool steels.

Material & Technical Analysis

The material is supplied in the annealed condition, free of decarburization on all machined surfaces.

A.I.S.I. O1 GFS - Chemical Analysis
C 0.90 - 1.00%
Si 0.40
Mn 1.00 - 1.20%
Cr 0.50 - 0.70%
W 0.50 - 0.70%
Va 0.05 - 0.25%

Hardness as supplied: 229 Brinell max
Tensile Strength: 45 Tons / sq. in.

Table of Equivalent specifications
AISI Werk. No. AFNOR British Spec.
O1 1.2510 95 MCWV5 BS4659 BO1

Products and Dimensions

Tolerances: Thickness +/-0.001", Width +0.005" /-nil, Length Nominal

METRIC SIZES 500mm & 1000mm
Tolerances: Thickness +0.05mm / -nil, Width +0.2mm /-nil, Length Nominal

Pieces are line ground on all edges up to and including 2" / 50mm wide in the thicknesses up to and including ¼" / 6mm. All other dimensions are rotary ground on edges.

All edges and ends are deburred for handling safety, ends of bars for thicknesses of 3/8" / 10mm and above will be supplied with sawn ends, thinner sections are supplied with sheared ends.

Each piece is individually straightened with a flatness aim of 0.005" / 18" - 500mm.

Oversize tolerances are available along with alternative dimensions and lengths, if your requirements are 'non standard', please contact us for a quotation.

Alternative grades of material are also available on request.

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