EN 10085-2001 pdf download.Nitriding steels – Technical delivery conditions.
6.2.2 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 2 to 4.
6.2.3 Particular surface condition
If 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 Cast separation
The steels shall be delivered separated by casts.
7 Requirements
7.1 (‘hemical composition, hardness and mechanical properties
The requirements tor chemical composition, hardness and mechanical properties ciLed in I able I, column 9, apply as appropriate for the particular heat-treatment condition.
The requirements for mechanical properties given in this European Standard are restricted to the sizes given in Table 6.
7.2 Shearability
Under suitable shearing conditions (avoiding local stress peaks, preheating, application of blades with a profile adapted to that of the product etc.) all steels are shearable in the condition “soft annealed”.
7.3 Structure
7.3.1 Unless otherwise agreed. the steel when tested in accordance with one ol the methods described in EURONORM 103 shall show an austenitic grain size of 5 or finer.
7.3.2 Requirements for the ferrite content in the core may be agreed at the time of enquiry and order.
7.5.3 Where appropriate, requirements relating to surface quality of the products shall be agreed on at the time of enquiry and order, if possible with reference to European Standards.
EN 10163-2 specifies requirements for the surface quality of hot-rolled sheet/plate and wide flats. EN 10221 contains surface quality classification for hot-rolled bars and rods.
NOTE It is more difficult to detect and elimininate surface disconünuitics from coiled products than from cut lengths. This should he taken into account when agreements on surface quality are made.
7.5.4 Requirements may be specified at the time of enquiry and order regarding the permissible depth of decarburiza ion.
The depth of decarburization shall be determined in accordance with the micrographic method specified in EURONORM 104.
7.5.5 Repair of surface discontinuities by welding is not permitted.
If surface discontinuities are to be repaired. the method and permissible maximum depth of removal should be agreed 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 D).
8 knspection 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 at the 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:
c) the actual tempering temperature for the steel grades delivered in the quenched and tempered condition.
8.1.3 If. in accordance with the agreements in the order, an inspection certificate 3.1.A, 3.l.B or
3.l.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.
In addition the document shall cover
a) for all elements specitied 11w the steel type concerned, the resuks 01 the cast analysis given by the manufacturer:
h) the actual tempering temperature for the steel grades delivered in the quenched and tempered condition;
C) the result of all inspections and tests ordered by supplementary requirements (see annex B);
d) the symbol letters or numbers relating the inspection documents, the test pieces and products to each other.
8.2 Specific inspection and testing
8.2.1 Verification of the hardness and mechanical properties
8.2.1.1 The hardness requirements or mechanical properties given for the relevant heat-treatment condition in Table 1. column 9, sub-clause 2. shall, with the following exception, be verified. The requirement given in Table 1. footnote a (mechanical properties of reference test pieces), is only to be verified if the supplementary requirement specified in B. I is ordered.
8.2.1.2 The amount of testing. the sampling conditions and the test methods to be applied for the verification of the requirements shall be in accordance with the prescriptions of Table 7.
8.2.2 Verification of the grain size
In case the verification of the fine grain structure is specified. the method for determination of grain size according to EURONORM 103, the amount of testing and the testing conditions shall be agreed at the time of enquiry and order.EN 10085-2001 pdf download.