Grades of stainless steel A2, A4 in relation to fasteners

There are a number of different grades of stainless steel, and I want to look at the properties of two, namely A2 and A4 and discuss where they can be used. Firstly though, lets define Stainless Steel: Also known as inox steel from the French “inoxydable” is a steel alloy with a minimum of 10.5 % chromium. The chromium helps the alloy to resist staining and corrosion. The main point to make here is that Read more…

The advantages of Thread Rolling

The advantages of Thread Rolling There are a number of ways of applying a thread to a bar, from the very traditional Tap  and Die, single point threading on a metal lathe, bar threading machines which using the chasing method, and in some applications, lasers At Graphskill we use Roll threading and here we will briefly look at why With Roll threading there is no cutting, milling or chips, it is a more accurate, easier Read more…

When should you use galvanized steel or zinc plated steel?

When should you use galvanized steel or zinc plated steel? Both add a layer of zinc to the outside of the product. Zinc plating looks shiny and pretty, galvanized looks dull. But don’t be a magpie and just pick up the shiny object – think about the use. Both methods add a protective layer of zinc to the steel.  Zinc protects the steel by sacrificing itself – called a “sacrificial anode”. When exposed to the Read more…

Nominal Bore for pipe support systems

First some common definitions of the two words in the title: Nominal: as expected or planned; normal Bore: diameter of a tube / pipe So, putting those together we would expect “Nominal Bore” to mean the expected diameter of a tube – but within the realms of pipe support systems it is often a cause for error. U-bolts, pipe clips, pipe clamps, hangers and of course our own modular pipe support system – the 1205 Read more…