Specification Guide
Plate Size and Thickness Guide
This is every size and thickness SGZ publishes across its plate programme, in one place, so you can check whether a job fits before you ask for a quote.
Zinc plate
Coated zinc: 1000 x 500 mm and 1000 x 510 mm as stock sizes, 0.8 to 3.0 mm thick, other sizes to request.
Uncoated polished zinc: the same two stock sizes, 0.8 to 7.0 mm thick. Polished from 0.8 to 3.0 mm and non-polished from 3.5 to 7.0 mm.
Magnesium plate
Coated magnesium: 500 x 1000 mm, 610 x 457 mm and 610 x 914 mm, 1.0 to 10 mm thick, other sizes to request.
Uncoated highly polished magnesium: length up to 2000 mm, width up to 1500 mm, minimum thickness 0.5 mm.
Brass and copper
Brass for CNC engraving: maximum 2000 mm long and 400 mm wide, 0.7 to 50 mm thick, supplied unpolished with around +0.13 mm thickness deviation left as grinding allowance.
Mirror-surfaced copper: maximum 2000 mm long and 600 mm wide, in 1.0 mm, 1.4 mm, 1.5 mm and 2.0 mm.
Magnesium tooling plate
Common thickness 100 mm to 1000 mm, or to a customer requirement. Supplied polished, with thickness and flatness tolerance controlled, and specified for service from 350 degrees Fahrenheit down to minus 30 degrees Fahrenheit.
Reading the table
The widest plate SGZ makes is uncoated magnesium at 1500 mm. The longest is 2000 mm, on magnesium, brass and copper. The thickest thin-gauge plate is coated magnesium at 10 mm; past that you are into brass at 50 mm or tooling plate at 100 mm and up.
Products Referenced in This Guide

Photoengraving Magnesium Plate
Highly Polished Magnesium Plate for Engraving and Etching
Uncoated highly polished magnesium plate to 2000x1500 mm, from 0.5 mm, for CNC engraving and in-house resist.
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Brass Plate for Engraving
Brass Plate for CNC Engraving
Brass engraving plate, 0.7-50 mm, to 2000x400 mm, supplied with a +0.13 mm grinding allowance.
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Copper Plate for Etching
Polished Copper Plate for Photoengraving and Etching
Mirror-surfaced photoengraving copper plate in 1.0, 1.4, 1.5 and 2.0 mm, to 2000x600 mm, etches in FeCl3.
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Other Magnesium Products
Magnesium Tooling Plate
Polished magnesium tooling plate, 100-1000 mm thick, non-magnetic, damping, dimensionally stable.
View product →Answers
Questions About This Guide
What is the largest sheet SGZ can supply?
Uncoated highly polished magnesium plate, up to 2000 mm long and 1500 mm wide.
What is the thinnest plate?
Uncoated magnesium, from 0.5 mm.
What is the thickest engraving stock?
Brass, at 50 mm.
Can I order a size that is not on this list?
Yes. SGZ states that plate sizes are made as per request on the zinc, magnesium and tooling plate ranges.
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Read more →Put This Into a Quotation
SGZ quotes plate, developer, additive and machine together. Send the sizes and the volume and you will get one price for the line.