Metal encased bricks – Stein Contex MAG CSD

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Found at Stein Castlecary Works, Castlecary

From invoices recovered at the Stein, Manuel Works I believe these metal encased bricks may be ‘related’ to

Contex  MAG CSD – R Metal cased 230mm x 178mm x 76/70mm – £336.80 per tonne

Contex Mag CSD/W metal cased 300mm x 175mm x 90mm O/ALL pos FR2/1 Steel sheeted (22 guage) with detrick recess suspended ends – £315.90 per tonne

Example below measures approx – 230mm x 120mm x 70mm


Below – and this example measures approx 375mm x 125mm x 70mm



This film shows you these steel clad bricks being made at the Stein Works – the steel sheath oxidises in the heat and welds the bricks together forming a self supporting arch.

steel clad brick  steel clad brick F052


The 2 photos below were taken within the Manuel Works c.1980 and appear to show the steel clad bricks being made.



manuel works steel clad brick


Harley Marshall, ex Export Manager at the Stein Manuel Works states the bricks were manufactured as  chrome magnesite or magnesite chrome bricks.  He remembers them being called 18/8’s or 25/20’s and recalls this referred to the nickel / chrome or chrome / nickel content of the steel plating.  He states the basic bricks were made at the Manuel Works  and transported to the  Stein Castlecary Works to be clad in the steel jackets.

They were hung back to back on special hooks or tabs from perhaps a furnace roof. In the heat they fused together forming a strong self supporting roof.

It is believed the MAG CSD stands for Magnesite Chrome Steel- clad Dense

These bricks were  rebranded to the Contex name on the merger with General Refractories