ISO 9587:2007 pdf download.Metallic and other inorganic coatings —Pretreatment of iron or steel to reduce the risk of hydrogen embrittlement.
NOTE 1 The treatment ciass selected is based upon experience with the pail or similar parts, and the speciric alloy used, or with empwical test data- Some parts, because of factors such as alloy conosition end stn,cture, size, mass or design parameters, can perform satisfactorily with no stress-relief treatment. Therefore, Class SR-O treatment is provided for parts that the purthaser wishes to exempt from treatment
NOTE 2 Th use of intsbitors in acid pickling baths does not necessarily guarantee that hydrogen embrittlement e minimized,
NOTE 3 Class SR-I, the longest treatment, Is the default when the purchaser does not specify a dass. The electroplater. supplier or processor a not normally In possession of the necessary Information, such as design considerations, widuced stresses from manutactunng operations, etc. that have to be considered si selecting the correct stress-relief treatment. It in the purchasers Interest that their part designer, manufacturing engineer or other technicaly qualified individual speofy the treatment class on the part drawing or purchase order, In order to avoid the extra cost of the default treatment.
5 Categorization of steels
With the exception of surface-hardened parts the heat treatment conditions shall be selected on the basis of the actual tensile strength When only the minmium tensile strength is specified or if the tensile strength is not known, the heat treatment condition shall be selected by relating known or measured hardness values to equivalent actual tensile strengths. The tensile strength, or equivalent derived from known or measured hardness values, shall be supplied by the purchaser.
Steels that have been wholly or partly surface hardened shall be considered as being in the category appropriate to the hardness of the surface-hardened layer.
NOTE 2 Th use of intsbitors in acid pickling baths does not necessarily guarantee that hydrogen embrittlement e minimized,
NOTE 3 Class SR-I, the longest treatment, Is the default when the purchaser does not specify a dass. The electroplater. supplier or processor a not normally In possession of the necessary Information, such as design considerations, widuced stresses from manutactunng operations, etc. that have to be considered si selecting the correct stress-relief treatment. It in the purchasers Interest that their part designer, manufacturing engineer or other technicaly qualified individual speofy the treatment class on the part drawing or purchase order, In order to avoid the extra cost of the default treatment.
5 Categorization of steels
With the exception of surface-hardened parts the heat treatment conditions shall be selected on the basis of the actual tensile strength When only the minmium tensile strength is specified or if the tensile strength is not known, the heat treatment condition shall be selected by relating known or measured hardness values to equivalent actual tensile strengths. The tensile strength, or equivalent derived from known or measured hardness values, shall be supplied by the purchaser.
Steels that have been wholly or partly surface hardened shall be considered as being in the category appropriate to the hardness of the surface-hardened layer.
