BS EN 4700-002:2021 pdf free download – Aerospace series一Steel and heat resisting alloys – Wrought products一Technical specification Part 002: Bars and sections.
6.3.2 Retests
If any requirement is not met, retests shall be carried out following an agreement between manufacturer and customer. Products shall be:
a) rejected; or
b) 100 % retested and the conforming products accepted; or
c) partially or fully re-heat treated if heat treatment can rectify the cause of the failure and retested. For condition of use material the number if re-heat treatments shall not exceed the number specified in Table 1 (line 7). The reheat treatment shall be stated on the release test certificate.
6.3.3 Rejection
Any failure to meet the requirements of the material standard shall be cause for rejection.
6.3.4 Special tests
Special tests may be required by the customer. In such cases, the nature of the test, method, frequency and technical requirements shall be specified on the order or inspection schedule and shall be mutually agreed by the manufacturer and the customer.
6.3.5 Capability clause
Where the capability clause is invoked and where sufficient statistical evidence exists, the test need not be carried out (unless specifically requested by the customer).
However, this in no way reduces the obligations of the manufacturer to fulfil the requirements. If subsequent testing indicates that the product does not comply with the requirements, the batch shall be rejected.
If sufficient statistical evidence does not exist, the test shall be carried out at a frequency agreed between the manufacturer and customer.
6.3.6 Statistical process control
Reduction in the extent of release testing, other than that defined in 6.3.5 above, may be negotiated with the customer on the basis of appropriate statistical process control and/or statistical data.
6.3.7 Inspection and test report
The manufacturer shall furnish, with each delivery, a report conforming to the requirements of EN 2078 stating the following:
a) manufacturer’s name and address and, if appropriate, identification of the plant;
b) order number;
c) material standard number;
d) method of melting;
e) delivery condition and metallurgical code of the product;
f) quantity and dimensions;
g) manufacturing and inspection schedule reference if required by the customer;
h) cast and batch number;
I) all heat treatment, including re-heat treatment and, where appropriate, straightening and stress relieving parameters, applied to the batch;
j) test samples heat treatment;
k) results of the tests and any retests if required by the customer.
6.4 Traceability
Each product shall be traceable to the cast, production batch and/or heat treatment batch at all stages of manufacture, testing and delivery.
7 Requirements
See Table 1 and Table 2.