Question: I’m using a Carbon Steel, En 10025-1 Grade S355 J2 G3 as material for my procedure test piece, a butt weld in 20mm thick plate welded to satisfy the requirements of BS EN ISO 15614-1 : 2004 + A2 : 2012 but I have no intention of using the end product at sub zero temperatures. None of the application standards applicable to the design of the product involve operations sub zero. Can I therefore test my impacts at 0 deg C and still be code compliant?
Answer: The Testing Temperature shall be chosen by the manufacturer with regard to the application or application standard but need not be lower than the parent material specification.
Q. After an audit for our CE marking, we had a finding that the first page of our WPQR that was carried out in accordance with BS EN ISO 15614-1: 2004 +A2 2012, states Steels group 1 with yield strengths up to 355. Our auditor says we should state the sub groups. i.e. 1.1 & 1.2.
Is this correct?
A. The auditor is incorrect.
Table 3 of BS EN ISO 15614-1: 2004 +A2 2012 sets out the range of qualification for steel groups and sub groups. Sub groups are highlighted by note b, where note b is applicable sub groups should be stated on the WPQR. Not including sub groups on the WPQR would be incorrect.
The only applicable note against Group 1 Steels is note a. Where note a is applicable it should state on the WPQR that the material covers the equal or lower specified yield strength steels of the same group. There is no mention of sub groups and including them on the WPQR would be incorrect.
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Harris Pye Engineering Ltd
Geoff Magaskil, JT Price