ISO 4955:2016 pdf free

ISO 4955:2016 pdf free.Heat-resistant steels
The mechanical properties at room temperature as specified in Tables 6 and Z apply for the relevant specified heat treatment condition. This does not apply to the process route 1U (hot rolled, not heat-treated, not descaled). If, by agreement at the time of ordering, the products are to be supplied in a non-heat-treated condition, the mechanical properties specified in Tables 6 and Z shall be obtainable from reference test pieces which have received the appropriate heat treatment (simulated heat treatment).
The mechanical properties at elevated temperature as specified in Table 8 apply for each specified heat treatment condition. This does not apply to the process route 1U (hot rolled, not heat-treated, not descaled) and to semi-finished products.
The tensile test at elevated temperature shall be carried out at temperature of interest only when agreed at the time of enquiry and order.
If, by agreement at the time of ordering, the products are to be supplied in a non-heat-treated condition,the mechanical properties specified in Table 8 shall be obtainable from reference test pieces which have received the appropriate heat treatment (simulated heat treatment).
Availability, and the determination of the types of process route and surface finish (for flat products,see Table 4 and for long products, see Table 5) most suited to a particular case, should be discussed with the manufacturer.
The general surface appearance with respect to soundness and surface finish shall be consistent with good production practice, for the grade and quality ordered, as determined by visual inspection.When flat products are delivered in coil form, the degree and extent of imperfections may be expected to be higher, due to the impracticability of removing short lengths of coil.
Flat products delivered with hot-rolled or cold-rolled finishes (see Table 4) shall, unless otherwise agreed, be supplied with only one surface inspected to the required finish (the prime surface). In such instances, the manufacturer should indicate the prime surface, by marking the material or the packaging, or by some other agreed method. The default method is to mark the prime surface, and to make this surface the top surface of plates, sheets and cut lengths, or the outside surface of coiled products.
For long products, the available surface finishes are given in Table 5. Slight surface imperfections,inherent to the production process, are permitted. Exact requirements concerning the maximum depth of acceptable discontinuities for bars, rods and sections in the relevant conditions are given in Table 1.ISO 4955 pdf free.