BS B 100:1992 pdf free download.Procedure for Inspection , testing and acceptance of wrought copper alloys.
1.1 Scope
BS B 100 specifies procedures for inspection, testing and acceptance of wrought copper-based alloys for aerospace purposes. It is applicable to the following, which are covered in separate sections of the standard:
a) rod and sections (section 2);
b) forging stock (section 3);
c) forgings (section 4);
d) seamless tube (section 5);
e) sheet, strip and foil (section 6):
1) wire (section 7).
BS B 100 is applicable to material specifications in the British Standard Aerospace B series and also to other British Standard material specifications for wrought copper base alloys which are suitable for aerospace use. Rules for the application of values for chemical composition and mechanical properties given in material specifications are covered in Appendix A.
NOTE The titles of the publications referred to in BS B 100 are listed on the inside back cover.
1.2 Definitions
For the purposes of BS B 100 the following definitions apply. For convenience, some of the definitions given in BS 6931 are repeated here.
1.2.1
batch
quantity of a product of the same nominal dimensions and treated as a set for quality control purposes
NOTE Batch sizes for specific products are given in the relevant sections of this standard.
1.2.2
cast
metal taken from the same melt in a furnace or crucible or from several melts mixed in the same furnace or crucible: or, when a continuous process is used, metal taken from the furnace before the next charge
1.2.3
design authority
the organization responsible for the detailed design of matriel and which has the responsibility for certifying designs andlor for sealing drawings and specifications
j) any dimensions which require checking on each forging (see 4.4.3.4.2):
k) the procedure required for producing batch release tensile test samples (see 4.4.4);
l) the required location of the test pieces for tensile tests if other than that specified in 4.4.4.2;
m) the required sampling frequency for tensile tests, if other than that specified in 4.4.4.1:
n) if grain flow examination is required, the type and frequency (see 4.4.6.1) and the required characteristics (see 4.4.6.2);
o) any markings required in addition to those specified in 4.5.1 a) to e);
p) the required position of the markings (see 4.5.2);
Sheet, strip and foil only
q) if more than one sample is required from a coil (see 6.3.2.1.5).
1.3.2 Items to be agreed between the contracting parties
The following items to be agreed between the contracting parties, which are specified in the clauses referred to, shall be fully documented. Both the definitive requirements specified throughout the standard and the following documented items shall be satisfied before a claim of compliance with the standard can be made and verified.
General
a) the ultrasonic testing technique to be used and the acceptance level, where these are not given in the material specification (see 2.3.2.2, 3.3.2.2, and 4.4.3.3.1);
Forgings only
b) the dimensional tolerances of the forgings (see 4.4.3.4.1);
c) the sampling requirements for the residual stress test (see 4.4.7.2):
Sheet, strip and foil only
d) the method for taking one or more additional samples from a coil, where applicable (see 6.3.2.1.5).
1.4 Manufacture and freedom from
defects
1.4.1 The method of manufacture shall comply with the material specification. If alternative methods are given in the material specification, or if no method is specified. the selection of the method shall be at the discretion of the manufacturer.
2.1 General
2.1.1 General
This section covers the inspection and testing procedures for rod and sections (including hollow rod and sections) and is to be used in conjunction with section 1.
2.2 Manufacture
The method of manufacture shall be in accordance with the material specification.
2.3 Inspection and testing
2.3.1 Batch sizes for sampling
Batch sizes for rods shall be as given in Table 1.
Batch sizes for sections shall be those given in
Table 1 for rods of equivalent cross-sectional area.
NOTE Inspection and testing requirements for rd and sections
are summarized in Table 2.
2.3.2 Non-destructive tests
2.3.2.1 External defects
Each product shall be examined over its whole surface, either visually or by an automatic method, and shall be free from harmful defects.
2.3.2.2 Internal defects
If specified in the material specification or on the order, each product shall be ultrasonically tested [see 1.3.1 d)]. The technique to be used and the acceptance level shall be in accordance with the material specification or agreed between the manufacturer and the purchaser, as applicable [see 1.3.2 a)].
2.3.2.3 Dimensions and tolerances The dimensions of the product shall be measured and shall fall within the tolerances given in the material specification or on the order [see 1.3.1 e)1. The frequency of measurement shall be at the discretion of the manufacturer.
4.4.4.2 In the case of test samples taken from forgings Isee 4.4.4.1 a) and b)1 the test piece shall be machined from the test sample so that the axis of the test piece is parallel to the major dimension of the forging. unless a specific location is specified on the drawing, order or inspection schedule [see 1.3.1 1)]. The test piece shall be to the dimensions of the largest test piece specified in BS A 4-1.1 that it is practicable to take from a particular product.
4.4.4.3 Test samples forged separately from forging stock [see 4.4.4.1 c)I shall be prepared in accordance with 3.3.3.1 and 3.3.3.2, and tensile test pieces shall be prepared from these samples in accordance with 3.3.3.3.
4.4.4.4 Tensile testing shall be in accordance with
BS A 4-1.1.
4.4.4.5 The tensile properties shall comply with the material specification, or with the drawing or inspection schedule, as applicable [see 1.3.1 1)1.
4.4.5 Hardness test
4.4.5.1 All forgings and tensile test samples shall he hardness tested unless otherwise agreed by the quality assurance authority. The hardness test shall be carried out in accordance with one of the methods listed in BS A 4-5, as required by the material specification. The hardness of the material shall comply with the material specification.
4.4.5.2 If any hardness result fails to comply with the material specification the following procedure shall be followed.
a) Provided that the hardness of the forgings and test samples in the batch is uniform and the tensile properties comply with those specified in the material specification, drawing or inspection schedule, the batch shall be accepted subject to written agreement from the design authority.
b) Where the hardness is not uniform, the forgings of incorrect hardness, together with the appropriate tensile test samples, shall be heat treated or re-heat treated as appropriate and retested.
4.4.6 Grain flow
4.4.6.1 If grain flow examination is specified on the order, drawing or inspection schedule Lsee 1.3.1 n)], macroscopic and microscopic examination shall be carried out. The type of examination and the sampling frequency shall be as specified on the order, drawing or inspection schedule.
4.4.6.2 The grain flow shall he the same as that obtained on the pre-production forgings and shall comply with the order, drawing or inspection schedule [see 1.3.1 n)J.