This document specifies requirements for the identification, location and preparation of samples and test pieces intended for mechanical tests on steel sections, bars, rod, flat products and tubular products as defined in GB/T 15574.
This standard is applicable to sampling and preparation of test pieces for mechanical testing of steel and steel products. If agreed in the order, this document can also apply to other metallic products. These samples and test pieces are carried out in conformity with the methods specified in the product standard, material standard or testing standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reference, the latest edition (including all the amendments) applies.
GB/T 15574 Steel products Vocabulary (GB/T 15574-2006, ISO 6929: 2013, NEQ)
GB/T 20832 Metallic materials — Designation of test specimen axes in relation to product texture(GB/T 20832—2007, ISO 3785:2006, IDT)
3 Terms and definitions
For the purpose of this standard, the terms and definitions specified in GB/T 15574 as well as the followings apply.
3.1
test unit
number of pieces or the tonnage of products to accept or reject together, on the basis of the verification tests carried out on sample products in accordance with the requirements of the product standard or order.
Note: see Figure1.
3.2
sample product
item (e.g. bar, sheet, coil) selected from test unit for inspection or testing.
