Kovové materiály

Oblast zaměření: Ocel
Komise : CEN/TC 459/SC 2 (Methods of chemical analysis for iron and steel)
Původce: CEN
K připomínkám do: 2.04.2019
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This International Standard specifies a gravimetric method for the determination of the silicon content in steels and cast irons.

The method is applicable to silicon contents between 0,10 % (mass fraction) and 5,0 % {mass fraction).

NOTE          For samples containing molybdenum, niobium, tantalum, titanium, tungsten, zirconium or high levels of chromium, the results are less precise than for unalloyed steels.

Oblast zaměření: Lehké slitiny
Komise : CEN/TC 132 (Aluminium and aluminium alloys)
Původce: CEN
K připomínkám do: 2.04.2019
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This document defines the requirements for grades of alloyed aluminium ingots intended for remelting.

It specifies the classifications and designations applicable to these grades, the conditions in which they are produced, their properties and the marks by which they are identified.

Oblast zaměření: Lehké slitiny
Komise : CEN/TC 132 (Aluminium and aluminium alloys)
Původce: CEN
K připomínkám do: 2.04.2019
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This document specifies the chemical composition limits for aluminium casting alloys and mechanical properties of separately cast test pieces for these alloys.

Annex C is included as a guide to the selection of alloys for a specific use or process.

This document is intended to be used in conjunction with EN 576, EN 1559‑1, EN 1559‑4, EN 1676 and EN ISO 8062‑3.

Oblast zaměření: Svařování
Komise : CEN/TC 121 (Welding and allied processes)
Původce: CEN
K připomínkám do: 3.04.2019
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This part of IS0 9455 specifies two methods for the determination of the acid value of a flux of types 1 and 2 only, as defined in IS0 9454‑1.

Method A is a potentiometric titration method and is to be considered as the reference method.

Method B is an alternative, visual end‑point, titration method.

Oblast zaměření: Měď
Komise : CEN/TC 133 (Copper and copper alloys)
Původce: CEN
K připomínkám do: 9.04.2019
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This document specifies a procedure for the eddy current test with an encircling test coil for measuring defects on the outer surface of seamless round copper and copper alloy tubes.

NOTE          The eddy current test method(s) required, together with the size range and acceptance level, are defined in the relevant product standard.

The choice of the method for eddy current test:

—    with an encircling test coil on the outer surface according to prEN 1971‑1;

or

—    with an internal probe on the inner surface according to prEN 1971‑2;

is at the discretion of the manufacturer if there are no other agreements between the purchaser and the supplier.

Oblast zaměření: Měď
Komise : CEN/TC 133 (Copper and copper alloys)
Původce: CEN
K připomínkám do: 9.04.2019
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This document specifies a method for the estimation of the average grain size of copper and copper alloy products by ultrasound. This document can be applied for seamless round tubes as well as for flat products.

This method can be used in place of test methods according to EN ISO 2624, mentioned in the relevant product standards. As reference method and in case of doubt the intercept procedure or planimetric procedure will be used.

Oblast zaměření: Měď
Komise : CEN/TC 133 (Copper and copper alloys)
Původce: CEN
K připomínkám do: 9.04.2019
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This document specifies a procedure for the eddy current test with an internal probe for measuring defects on the inner surface of seamless round copper and copper alloy tubes.

This document applies particularly for finned tubes with high fins according to EN 12452.

NOTE          The eddy current test method(s) required, together with the size range and acceptance level, are defined in the relevant product standard.

The choice of the method for eddy current test:

—    with an encircling test coil on the outer surface according to prEN 1971‑1

or

—    with an internal probe on the inner surface according to prEN 1971‑2

is at the discretion of the manufacturer if there are no other agreements between the purchaser and the supplier.

Especially for finned tubes according to EN 12452 with high fins, it is suggested to use eddy current test with internal probe as described in this document.

Oblast zaměření: Ocel
Komise : CEN/TC 459/SC 10 (Steel tubes, and iron and steel fittings)
Původce: CEN
K připomínkám do: 16.04.2019
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This Part of EN 10217 specifies the technical delivery conditions in two test categories for welded tubes of circular cross-section made of austenitic and austenitic-ferritic stainless steel which are intended for pressure and corrosion resisting purposes at room temperature, at low temperatures or at elevated temperatures.

NOTE          Once this document is published in the Official Journal of the European Union (OJEU) under Directive 2014/68/EU, pressure equipment directive, presumption of conformity to the Essential Safety Requirements (ESR) of Directive 2014/68/EU is limited to technical data of materials in this standard and does not presume adequacy of the material to a specific item of equipment. Consequently, the assessment of the technical data stated in this material standard against the design requirements of this specific item of equipment to verify that the ESRs of the Pressure Equipment Directive are satisfied, needs to be done by the designer or manufacturer of the pressure equipment, taking also into account the subsequent manufacturing processes which may affect properties of the base materials.

Oblast zaměření: Kovové koroze
Komise : CEN/TC 262 (Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys)
Původce: CEN
K připomínkám do: 30.04.2019
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This document specifies two low voltage tests for detecting and locating defects that extend to the basis metal in vitreous and porcelain enamel coatings.

Method A (electrical) is suitable for the rapid detection and determination of the general location of defects. Method B (optical), based on colour effects, is suitable for the more precise detection of defects and their exact locations. Both methods are commonly applied to flat surfaces. For more intricate shapes such as undulated and/or corrugated surfaces ISO 8289‑2 has to be applied.

NOTE 1       Selection of the correct test method is critical to distinguish the areas of increased conductivity detected by Method B from actual pores that extend to the basis metal, which can be detected by both methods.

NOTE 2       The low voltage test is a non-destructive method of detecting defects (see Clause 3) and therefore, is completely different from the high voltage test specified in ISO 2746. The result of high and low voltage test are not comparable and will differ.

Oblast zaměření: Kovové koroze
Komise : CEN/TC 262 (Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys)
Původce: CEN
K připomínkám do: 30.04.2019
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This part of ISO 14713 provides guidelines and recommendations regarding the general principles of design which are appropriate for articles to be hot dip galvanized after fabrication (e.g., to ISO 1461) for corrosion protection, for example, articles manufactured in accordance with EN 1090-2.

The protection afforded by the hot dip galvanized coating to the article will depend upon the method of application of the coating, the design of the article and the specific environment to which the article is exposed. The hot dip galvanized article can be further protected by application of additional coatings (outside the scope of this part of ISO 14713), such as organic coatings (paints or powder coatings). When applied to hot dip galvanized articles, this combination of coatings is often known as a “duplex system”.

Specific product-related requirements (e.g. for hot dip galvanized coatings on tubes or fasteners, etc.) will take precedence over these general recommendations.

This standard does not apply to hot dip galvanized coatings applied to continuous sheet (e.g. to EN 10346).

Oblast zaměření: Ocel
Komise : CEN/TC 459/SC 10 (Steel tubes, and iron and steel fittings)
Původce: CEN
K připomínkám do: 7.05.2019
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This International Standard specifies uniform methods for the testing and performance evaluation of metallic tube connections, stud ends for ports and flange connections for use in hydraulic fluid power applications. This International Standard does not apply to the testing of hydraulic quick-action couplings, which is covered by ISO 18869.

Tests outlined in this International Standard are independent of each other and document the method to follow for each test. See the appropriate component International Standard for which tests to conduct and for performance criteria.

For qualification of the connector, the minimum number of samples specified in this International Standard is tested, unless otherwise specified in the relevant connector standard or as agreed upon by the manufacturer and the user.