ISO Heat-treated steels, alloy steels and free-cutting steels — Part Ball and roller bearing steels. This standard has been revised by ISO . Heat-treated steels, alloy steels and free-cutting steels – Part Ball and roller bearing steels (ISO ); German version EN ISO. STANDARD. ISO. Third edition. Reference number. ISO (E). This is a free 6 page sample. Access the full version online.
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Aciers pour roulements Reference number ISO Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee.
International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. In particular the different approval criteria lso for the different types of ISO documents should be noted.
ISO shall not be held responsible for identifying any or all such patent rights. Alloy steels for quenching and tempering — Part 3: Ball and roller bearing steels 1 Scope 1. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document including any amendments applies. If izo, the purchaser shall be informed about the steel making process used. Remelting of the steel may be agreed upon at the time of enquiry and order.
If there is no agreement, the products shall be delivered in the untreated condition.
The product analysis shall be carried out when specified at the time of the enquiry and order see 9. For verification of the grain size, see A. Case-hardening steels may show remnants of incompletely spheroidized carbides. For the degree of spheroidization see Lso.
Therefore all bearing steels shall have a certain degree of cleanliness. The requirements for the content of non-metallic inclusions apply in every case; however, verification requires a special agreement, see A.
The type of document shall be agreed upon at the time of enquiry and order. If the order does not contain any specification of this type, an inspection certificate 3. In addition the inspection certificate report shall cover: In cases of dispute, the method for product analysis used shall be agreed, taking into account the relevant existing International Standards.
The calculation method is left to the discretion of the manufacturer. If agreed at the time of enquiry and order the manufacturer shall give sufficient information about the calculation for the customer to confirm the result. All reasonable precau- tions should be taken to prevent additions from scrap or other materials, used in the manufacture of such elements, which affect the hardenability, mechanical properties and applicability.
For through-hardening, stainless and high-temperature bearing steels, this condition is also used if the steel is processed by machining operations. The maximum Vickers hardness value HV must be agreed upon at the time of enquiry and order. Where necessary, exact requirements may be agreed upon at the time of enquiry and order. Details of these requirements shall, where necessary, be agreed upon by the manufacturer and purchaser at the time of enquiry and order.
If specific testing is ordered, the grain size requirement is to be verified by determining the aluminium content or micrographically. In such cases, the micrographic investigation is not necessary. The aluminium content shall be given in the inspection document. Otherwise, one test piece per cast shall be inspected for the determination of the austenitic grain size. When making such agreements, the steel grade and the size of the product shall be taken into account. If the verification of the carbide distribution is required, the details of this shall also be agreed upon.
100Cr6 (EN ISO 683-17)
For these characterstics, additional requirements may be agreed upon at the time ieo enquiry and order. The actual method of assessment, criteria and limits for determining the content of non-metallic inclusions are to be defined at the time of enquiry and order. The worst field for each individual inclusion type shall be recorded and a mean value calculated. Acceptance limits are shown above. It may be used in the special methods for expressing results, i.
Also the details for sampling and for preparation of the test pieces isl testing the surface quality shall be agreed upon at the time of enquiry and order. Remember me on this computer. Enter the email address you signed up with and we’ll email you a reset link.
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