PD 970:2005

This standard PD 970:2005 Wrought steels for mechanical and allied engineering purposes. Requirements for carbon, carbon manganese and alloy hot worked or cold finished steels is classified in these ICS categories:

• 77.140.20 Stainless steels

This Published Document specifies the technical purchase and supply requirements for the following wrought semi-finished products manufactured from a range of carbon, carbon manganese, low alloy, free-cutting, case-hardening and through hardened steels for the following special applications:

• blooms;

• billets;

• slabs;

• bars;

• rod;

• flats and wide flats.

NOTE These wrought steels may be supplied in the hot formed condition or as thermally treated black bar. Cold finished bar may be subjected to pre- or post-thermal treatment.

It does not specify any boron, micro-alloyed, stainless steels or any products delivered as forgings, which are all covered by other standards (see Foreword).

It does not apply to direct cast products.

PD 970 is presented in the style of a European Standard and references other European Standards (e.g. test methods) wherever possible. The traditional seven digit alphanumeric UK designation is maintained, though it is important to note that the "A", "M" and "H" system (nominally representing Analysis, Mechanical and Hardenability) should not be confused with other nomenclature. This applies equally to the conventional tensile strength range designations, namely P through to Z which are still used in this document.

Certain other aspects such as requirements for steelmaking, deoxidation and grain size have been revised to reflect modern technology.