GMW GMW14731 PDF

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. Stress-corrosion cracking (or, as it is alternatively known, season cracking) is failure by cracking under the combined action of corrosion and stress - either external (applied stress) or internal (residual stress).

Foreword. Not applicable.

Applicability. This test method shall be used to determine the susceptibility of formed components and semi-finished products made from copper based alloys, especially copper-zinc alloys, to stress-corrosion cracking. This test is carried out by exposing sample components to suitable corrosive media under controlled conditions for specified time periods and subsequently examining for induced cracking.

Two alternative methods are described:

• Method A using an atmosphere of ammonia as the corrosive medium.

• Method B using acidic mercurous nitrate as the corrosive medium.