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Various countries and ISO stainless steel standards stipulate that hot-rolled (forged) steel, except steel for heat and pressure processing, is generally delivered in a heat-treated state (heat treatment requirements must be specified in the order contract).
After heat treatment, surface treatment or surface finishing such as pickling, shot blasting or turning and peeling is carried out according to requirements. For cold-rolled or cold-drawn steel, it is delivered in a cold-worked state, or in a state of cold working followed by heat treatment, pickling or shot blasting, or in a state of heat treatment followed by smoothing, grinding, polishing services, or hardening to varying degrees.
ISO, EN, and DIN standards stipulate several different types of combinations for the delivery status of steel according to production and processing methods and surface conditions, which are more scientific and reasonable and are conducive to the implementation of standards.
Regarding the heat treatment system, in addition to ASTM standards, various countries and ISO standards have specific provisions on the heat treatment system for each grade of delivered steel or the heat treatment system for samples for measuring mechanical properties.
Only ASTM standards, except for precipitation hardening steel, generally do not specify the heat medical treatment system for each grade in the steel standards. They only specify the type of heat treatment (such as annealing, co-solution or aging). The heat treatment requirements for various types of steel are in These are described in the general technical requirements standards for each variety.
Link to this article：Steel delivery status and heat treatment requirements
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