ISO 11971:2008(E) © ISO 2008 – All rights reserved 3 Table 2 — SCRATA surface-discontinuity comparators Reducing Increasing Inclusions B1 B2 B4 B5

Steel and iron castings — Visual testing of surface quality 1 Scope 1.1 This document covers the acceptance criteria for the visual testing of the surface of steel and iron castings. 1.2 Acceptance levels utilize Bureau de Normalisation des Industries de la Fonderie (BNIF) and Steel Castings Research and Trade Association (SCRATA) or Casting Technology International (CTI) reference

Series n°2 – Particular finishing, typical of ground surfaces. 7 examples marked 2/0 S2 to 5 S2. Series n°3 – Special finishing for steel castings, typical for thermal cutting or hammering. 6 examples, marked 1 S3 to 6 S3.

1.2 Acceptance levels utilize Bureau de Normalisation des Industries de la Fonderie (BNIF) and Steel Castings Research and Trade Association (SCRATA) reference comparators for the visual determination of surface roughness and surface discontinuities …

A Reference numbe r ISO 11971:1997(E) INTERNATIONAL STANDARD ISO 11971 First edition 1997-12-15 Visual examination of surface quality of steel castings Examen visuel de l'état de surface des pièces moulées en acier

BNIF显示比较器的ISO标准的A6 规格 （105mm×148mm） 。 （其比较面积大致为 15000mm2~15500mm2） 。 本欧洲标准由欧洲标准委员会于一九九六年十月二十日采纳通过。 欧洲标准委员会成员依据欧洲标准委员会内部条例审批国家标准， 条件是国家标准的法规应完全 符合欧洲标准的法规。 与国家标准相关的标准名单及参考书目可从中央秘书处或欧洲标准委员会成员处获得。 本标准有三种文字的正式版本（德语、英语、法语） 。 从一种版本翻译成另一种版 …

1.2 Acceptance levels utilize Bureau de Normalisation des Industries de la Fonderie (BNIF) and Steel Castings Research and Trade Association (SCRATA) or Casting Technology International (CTI) reference comparators for the visual determination of surface roughness and surface discontinuities described as follows: — surface roughness;

BNIF 359, Recommandation technique du Bureau de Normalisation des Industries de la Fonderie. Caractérisation d'états de surface des pièces moulées — Utilisation des échantillons types de 110 × 160 mm, available from CTIF, 44 avenue de la Division Leclerc, 92310 Sèvres, France, www.ctif-editions.com.

1.1 This document covers the acceptance criteria for the visual testing of the surface of steel and iron castings. 1.2 Acceptance levels utilize Bureau de Normalisation des Industries de la Fonderie (BNIF) and Steel Castings Research and Trade Association (SCRATA) or Casting Technology International (CTI) reference comparators for the visual det...

a) The SCRATA comparator set is used for steel or iron castings. b) The BNIF comparator set SI and S2 categories can be used for all alloys. Category S3 is used for steel castings only.