EN 10089-2002 pdf download.Hot rolled steels for quenched and tempered springs Technical delivery conditions.
Unless otherwise agreed at the time of enquiry and order, the products shall be delivered in the untreated, i. e. as
rolled, condition.
6.3.2 Particular heat-treatment condition
If so agreed at the time of enquiry and order, the products shall be delivered in one of the heat-treatment conditions
given in Table 1. lines 3 to 6.
6.3.3 Particular surface condition
It so agreed at the time of enquiry and order, the products shall be delivered in one of the particular surface conditions given in Table 2, lines 3 to 6.
6.3.4 Cast separation
The steels shall be delivered separated by casts.
7 Requirements
7.1 Chemlca composition, hardness and hardenability
7.1.1 Table 1 gives a survey of combinations of usual heat-treatment conditions at delivery, product forms and requirements according to Tables 3 to 8 (chemical composition, maximum dimensions for a minimum core hardness. hardenability. maximum hardness).
7.1.2 Where the steel is not ordered according to core hardness or restricted hardenability requirements. I. e.
where the steel type designations of Table 3, Table 6 or Table 7 and not the designations given in Table 5 or
Table 8 are applied, the requirements for chemical composition, hardenability and maximum hardness cited in
Table 1, (column 5) apply as appropriate, for the particular heat-treatment condition.
7i.3 Where the steel is. by using the designations given in Table 5, ordered according to core hardness requirements. the values of core hardenability given in Table 5 or Table B.1 apply. in addition to the requirements cited in Table 1, columns 5 (1) and 5 (2). In this case. the values of end-quench hardenability given in Table 7 or Table 8 are for guidance purposes only.
NOTE The maximum dimensions given in Table 5 correspond to the restricted hardenability scatterband according to Table 8. For smaller sizes (Table 6.1) the normal hardenability scatterband according to Table 7 can be sufficient.
7.1.4 Where the steel is, by using the designations given in Table 8. ordered according to restricted hardenability requirements. the values of restricted hardenability given in Table 8 apply, in addition to the requirements cited in Table 1, columns 5(1) and 5 (2).
7.5 Surface quality and decarburisation
7.5.1 AN products shall have a workmanlike finish.
7.5.2 At the time of enquiry and order. agreements may be made with regard to the required surface quality.
In the case of hot-rolled round bars and rods, such agreements shall be based on the requirements of EN 10221.
7.5.3 The values for the admissible partial surface decarburisation given in Table 9 apply for the as rolled condition (+AR), for the treated to improve shearability condition (+S). for the soft annealed condition (+A) and for the annealed to achieve spheroidizatiori of the carbides condition (+AC) and for the testing conditions given in
8.2.2.2.
7.5.4 Removal of surface discontinuities by welding is not permitted.
It surface discontinuities are to be removed by other methods, the kind and permissible depth for removal of
surface discontinuities should, where appropriate, be agreed upon at the time of enquiry and order.
7.6 Dimensions, tolerances on dimensions and shape
The nominal dimensions, tolerances on dimensions and shape for the product shall be agreed at the time of enquiry and order, if possible, with reference to the dimensional standards applicable (see Annex C).
8 Inspection and testing
8.1 Types and contents of inspection documents
8.1.1 For each delivery, the issue of any inspection document according to EN 10204 may be agreed upon atttie time of enquiry and order.
8.1.2 If, in accordance with the agreements made at the time of enquiry and order, a test report is to be provided, this shall cover:
a) the statement that the material complies with the requirements of the order;
b) the results of the cast analysis for all elements specified for the type of steel supplied.
8.1.3 If, in accordance with the agreements in the order, an inspection certificate 3.1.A, 3.1.B or 3.1.C or an inspection report 3.2 (see EN 10204) is to be provided, the specific inspections and tests described in 8.2 shall be carried out and their results shall be certified in the document.EN 10089-2002 pdf download.