Metallurgi

Ämnesområden: Gjut- och tackjärn
Kommittébeteckning: SIS/TK 130 (Gjutet järn och stål)
Källa: ISO
Svarsdatum: den 30 jun 2019
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This International Standard defines the grades and the corresponding requirements for ausferritic spheroidal graphite cast irons.

This International Standard specifies five grades of ausferritic spheroidal graphite cast iron by a classification based on mechanical properties measured on machined test pieces prepared from

— separately cast samples, cast side-by-side or cast-on samples;

— samples cut from a casting.

This International Standard also specifies two grades by a classification as a function of hardness.

Kommittébeteckning: SIS/TK 129 (Lättmetaller)
Källa: CEN
Svarsdatum: den 2 jul 2019
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This European Standard specifies the material requirements and testing procedures applicable to wrought and cast aluminium and aluminium alloys intended for use in the production of pressure equipment, according to the definition given in European Pressure Equipment Directive 97/23 EC.

The standard covers:

- the products forms, grades and tempers of wrought and cast aluminium and aluminium alloys which may be used for such applications together with data for wrought and cast alloys over their permissible working temperature ranges;

- the permissible alloys/ tempers covered by this are those given in Table A.1 and in B.1 for wrought alloys and in Table A.2 and in B.2 for castings;

- the technical conditions for inspection and delivery, mechanical property limits and tolerances on form and dimensions by reference to the appropriate European standards for the relevant wrought and cast aluminium and aluminium alloys, and

- additional requirements which are specific to pressure equipment applications.

It applies to hot-rolled plate, cold-rolled sheet/ strip/ circles, extruded or extruded and cold drawn rod/bar, tube, extruded open / hollow profiles, forgings and castings.

It is the sole objective of this standard to cover materials only for pressure purposes and it excludes any elements of fabrication or fabrication methods for pressure equipment; such information can be found in the relevant standards listed in the "Bibliography" section.

Ämnesområden: Korrosion
Kommittébeteckning: SIS/TK 146 (Korrosion)
Källa: ISO
Svarsdatum: den 7 jul 2019
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This document contains the most important general guidelines for carrying out corrosion tests under conditions of constant immersion. However some of these general principles should also be applicable to other types of corrosion testing.

NOTE This document does not cover important procedures for stress corrosion testing such as those given in IS0 7539. (See Bibliography).

Kommittébeteckning: SIS/TK 123 (Mekanisk provning)
Källa: CEN
Svarsdatum: den 12 jul 2019
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This part of ISO 12004 provides guidelines for developing forming-limit diagrams and forming-limit curves for metal sheets and strips of thicknesses from 0,3 mm to 4 mm.

Kommittébeteckning: SIS/TK 123 (Mekanisk provning)
Källa: CEN
Svarsdatum: den 12 jul 2019
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This part of ISO 12004 specifies the testing conditions to be used when constructing a forming-limit curve (FLC) at ambient temperature and using linear strain paths. The material considered is flat, metallic and of thickness between 0,3 mm and 4 mm.

NOTE The limitation in thickness of up to 4 mm is proposed, giving a maximum allowable thickness to the punch diameter ratio.

For steel sheet, a maximum thickness of 2,5 mm is recommended.

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 25 jul 2019
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This document specifies a method using a barcoding system for tracing potential isolated defects that can be present in the following kinds of coated or uncoated steel flat products, for example:

• electro-galvanised surface

• galvanised surface

• galvannealed surface

• cold rolled surface

This method, named "quality tracking", aims at transferring additional material information to the steel users, especially the location of some isolated defects, in a reliable way. This method enables the manufacturer or purchaser to eliminate blanks or coils containing defects.

The method uses a 1D barcode to identify each section of steel strip.

NOTE 1 The stakeholders most involved in this technique are suppliers of steel flat products, car makers, appliance makers, part manufacturers, blanking line builders, steel processors, service centres, etc. All stakeholders can benefit from this project since defects can be traced, and, therefore, the steel containing defects can be eliminated or set apart of the production line.

NOTE 2 In the first stages of development, this method was called "defect tracking" (see [1]) and has been changed into "quality tracking" at the beginning of the standardization process.

NOTE 3 Quality tracking can be applied to other types of coated or uncoated steel flat products such as pickled and oiled, organic coated, and steels for packaging. Quality tracking can be applied for coiled materials for which the technology of quality tracking is applicable.

NOTE 4 If quality tracking data are used outside of the purpose of quality tracking, it is under the responsibility of the user.

NOTE 5 Quality tracking can be applied to other materials than steel.

NOTE 6 The way to collect the information to be transferred to the user is out of the scope of this document.

Ämnesområden: Pulvermetallurgi
Kommittébeteckning: SIS/TK 133 (Pulvermetallurgi)
Källa: CEN
Svarsdatum: den 12 aug 2019
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This International Standard specifies a method of determining the particle size distribution of metallic powders by dry sieving into size fractions.

The method is applicable to dry, unlubricated metallic powders, but not applicable to powders in which the morphology differs markedly from being equiaxial, for example flake-type powders.

The method is not applicable to metallic powders having a particle size wholly or mostly under 44 μm.

Ämnesområden: Pulvermetallurgi
Kommittébeteckning: SIS/TK 133 (Pulvermetallurgi)
Källa: CEN
Svarsdatum: den 12 aug 2019
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This International Standard specifies a method for determining the flow rate of metallic powders, including powders for hardmetals and mixes of metallic powders and organic additives such as lubricants, by means of a calibrated funnel (Gustavsson flowmeter).

The method is applicable only to powders which flow freely through the specified test orifice.