Metallurgi

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 20 apr 2021
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This document specifies requirements for tinmill products in the form of sheets or coils. Tinmill products consist of single and double reduced low carbon mild steel electrolytically coated with either tin (tinplate) or chromium/chromium oxide (ECCS) or (ECCS-RC) (see 3.3).
Single reduced tinmill products are specified in nominal thicknesses that are multiples of 0,005 mm from 0,16 mm up to and including 0,49 mm. Double reduced tinmill products are specified in nominal thicknesses that are multiples of 0,005 mm from 0,12 mm up to and including 0,29 mm.
NOTE 1 Other thicknesses can be ordered upon agreement.
This document applies to coils and sheets cut from coils in nominal minimum widths of 600 mm.
NOTE 2 Standard width coils for specific uses, e.g. tabstock, can be slit into narrow strip for supply in coil form.

Kommittébeteckning: SIS/TK 146 (Korrosion)
Källa: CEN
Svarsdatum: den 26 apr 2021
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This document specifies performance requirements for cathodic protection of steel in cement-based concrete, in both new and existing structures. It covers building and civil engineering structures, including carbon steel reinforcement and prestressed reinforcement embedded in the concrete. It is applicable to uncoated steel reinforcement and to organic-coated steel reinforcement. It is not applicable to carbon fibre reinforced concrete.

This document applies to steel embedded in atmospherically exposed, buried, immersed and tidal elements of buildings or structures.

This document applies only to the applications of cathodic protection to steel in concrete which are designed with the intention to, and can be demonstrated to, meet the Criteria of Protection as defined in 8.6. This requires the provision of sufficient performance monitoring systems as defined in 6.3 to all parts of the structure intended to be protected, in order to assess the extent to which the Criteria in 8.6 are met.

This may exclude from the Scope of this document galvanic anodes or systems applied into patch repairs to reduce the effects of ‘incipient anodes’. This may also exclude from the Scope of this document any form of cathodic protection systems or other electrochemical treatments that either cannot meet the requirements of 8.6 or are not provided with the performance monitoring systems (see 6.3) that are necessary to assess whether the Criteria of Protection as defined in 8.6 are met.

NOTE 1 Annex A gives guidance on the principles of cathodic protection and its application to steel in concrete.

NOTE 2 This document, while not specifically intended to address cathodic protection of steel in any electrolyte except concrete, can be applied to cathodic protection of steel in other cementitious materials such as are found, for example, in early 20th century steel-framed masonry, brick and terracotta clad buildings. In such applications, additional considerations specific to these structures are required in respect of design, materials and installation of cathodic protection; however, the requirements of this document can be applied to these systems.

Kommittébeteckning: SIS/TK 123 (Mekanisk provning)
Källa: ISO
Svarsdatum: den 11 maj 2021
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This International Standard specifies the conditions for performing torsional, constant-amplitude, nominally elastic stress fatigue tests on metallic specimens without deliberately introducing stress concentrations. The tests are typically carried out at ambient temperature or an elevated temperature in air by applying a pure couple to the specimen about its longitudinal axis.

While the form, preparation and testing of specimens of circular cross-section and tubular cross-section are described in this International Standard, component and other specialized types of testing are not included. Similarly, low-cycle torsional fatigue tests carried out under constant-amplitude angular displacement control, which lead to failure in a few thousand cycles, are also excluded.

Ämnesområden: Fjäderstål
Kommittébeteckning: SIS/TK 138 (Tråd och trådprodukter)
Källa: ISO
Svarsdatum: den 26 maj 2021
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This document specifies requirements for carbon steel wire of round cross-section supplied in the cold-draw condition and intended for the manufacture of springs for bedding and seating used in the automotive and furniture manufacturing industries.

The Standard applies to wire supplies in the uncoated condition, that is, without a metallic coating.

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 3 jun 2021
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This document specifies requirements for continuously organic coated (coil coated) steel flat products. It particularly specifies the performance requirements.

The products covered are wide strip, sheet cut from wide strip, slit wide strip, strip rolled in widths less than 600 mm and cut lengths (from sheet or strip).

NOTE National provisions can set up relationships between the performances of the coatings as required in this document and the outdoor atmospheres and ambiances required for a relevant building under study.

This document is not applicable to continuously organic coated flat products made of:

— tin mill products;

— electrical steels.

Kommittébeteckning: SIS/TK 138 (Tråd och trådprodukter)
Källa: ISO
Svarsdatum: den 4 jun 2021
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This International Standard specifies the composition, dimensions and mechanical properties of steel wire with a high mass fraction of carbon, generally brass coated, for reinforcing high-pressure hoses. It is applicable to multiple parallel wires, braided or spirally wrapped for reinforcement in a rubber or synthetic hose which is made to withstand a relatively high bursting pressure.

Kommittébeteckning: SIS/TK 123 (Mekanisk provning)
Källa: ISO
Svarsdatum: den 8 jun 2021
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This International Standard specifies terms, definitions, symbols, principles, apparatus, test piece, test procedure, data processing, result evaluation, report and other content for the torsion test at high strain rates for metallic materials by using torsional split Hopkinson bar.
This International Standard is applicable to the determination of mechanical properties of metallic materials at room temperature within the strain rate range from 102s−1to 104s−1, which are applied for the investigation of high strain rate problems such as vehicle collision, high speed forming and cutting based on finite element analysis in automotive, mechanical manufacture and aviation industries, etc.
This test method covers the shear strain-rate range above 102 s−1.