Metallurgi

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: ISO
Svarsdatum: den 22 okt 2017
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This International Standard applies to steel sheet (see 3.2) hot-rolled of structural quality with improved atmospheric corrosion resistance, also known as weather-resistant structural steel. It is produced in the grades and classes listed in Table 1. The product is intended for applications where requirements are for mechanical properties and increased resistance to atmospheric corrosion. It is generally used in the delivered condition and is intended for bolted, riveted or welded structures.

This document does not cover the following steel qualities:

— steels intended for boilers or pressure vessels, or steels designated as commercial quality or drawing qualities (see ISO 3573);

— steels produced on reversing mills and designated with improved atmospheric corrosion resistance (see ISO 630-5);

— steels designated with structural quality (see ISO 4995), or high yield strength structural quality (see ISO 4996);

— steels designated with higher yield strength with improved formability (see ISO 5951).

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: ISO
Svarsdatum: den 23 okt 2017
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This document is applicable to the minimum requirements for steel strip of carbon over 0,25 %, in coils and cut lengths.

The product is intended for highly stressed parts of many different types and is characterized by close dimensional tolerances and controlled surface finishes.

The steel strip is produced in a number of types and surface finishes to be compatible with differing applications requirements.

This document does not does not apply to alloy steels or stainless steels.

Kommittébeteckning: SIS/TK 480 (Gips)
Källa: CEN
Svarsdatum: den 31 okt 2017
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This European Standard specifies the requirements and test methods of metal lath and beads for external rendering.

This European Standard covers metal lath intended to be used for fixing to structures or solid backgrounds to provide a key to hold the plaster in position. Used in this way it enables fire protecting rendering systems to be provided.

This European Standard covers metal beads intended to be used to improve the protection of external angles and also provide features to the external finish of the construction and which can also be used as movement or expansion beads. They also contribute to fire protection.

Ämnesområden: Korrosion
Kommittébeteckning: SIS/TK 146 (Korrosion)
Källa: CEN
Svarsdatum: den 6 nov 2017
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This document specifies two accelerated corrosion-test procedures, Methods A and B, for the comparative evaluation of metallic materials with or without permanent corrosion protection or temporary corrosion protection in outdoor salt/acid rain environments. It also specifies the apparatus used. The two tests involve cyclic exposure of the specimens to acidified salt spray, "dry" and "wet" conditions.

The particular advantages of the two tests over conventional accelerated tests, such as the neutral salt spray test (NSS) as specified in ISO 9227 lie in their better ability to reproduce the corrosion that occurs in outdoor salt and/or acid rain environments. They are also useful for evaluating cosmetic corrosion.

Method A applies to

— metals and their alloys,

— metallic coatings (cathodic),

— anodic oxide coatings, and

— organic coatings on metallic materials.

Method B applies to

— steel coated with anodic coatings, and

— steel coated with anodic coatings covered with conversion coatings.

Kommittébeteckning: SIS/TK 121 (Bestämning av mikrostruktur i stål)
Källa: ISO
Svarsdatum: den 6 nov 2017
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This International Standard specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensional plane, even in a sample with a perfectly consistent grain size.

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 9 nov 2017
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This European Standard specifies the nominal dimensions and the tolerances on dimensions and shape of hot-rolled steel flat bars and steel wide flats for general purposes.

This standard is not applicable to spring leaves, see EN 10092-1.

Kommittébeteckning: SIS/TK 125 (Oförstörande provning)
Källa: CEN
Svarsdatum: den 13 nov 2017
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This part of ISO 10893 specifies requirements for film-based radiographic X-ray testing of the longitudinal or helical weld seams of automated fusion arc-welded steel tubes for the detection of imperfections.

It can also be applicable to the testing of circular hollow sections.

NOTE As an alternative, see ISO 10893-7 for digital radiographic testing.

Kommittébeteckning: SIS/TK 125 (Oförstörande provning)
Källa: CEN
Svarsdatum: den 13 nov 2017
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This part of ISO 10893 specifies the requirements for digital radiographic X-ray testing by either computed radiography (CR) or radiography with digital detector arrays (DDA) of the longitudinal or helical weld seams of automatic fusion arc-welded steel tubes for the detection of imperfections. This part of ISO 10893 specifies acceptance levels and calibration procedures.

This part of ISO 10893 can also be applicable to the testing of circular hollow sections.

Ämnesområden: Stål för värmebehandling
Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 23 nov 2017
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This part of EN 10225 specifies requirements for weldable structural steels to be used in the fabrication of fixed offshore structures in the form of plates.

Following thickness limitations are given in this standard:

— S355NL1O up to and including 200 mm;

— S355ML1O, S420ML1O, S460ML1O, S500ML1O up to and including 120 mm;

— S420QLO, S460QLO, S500QLO, S550QLO, S620QLO, S690QLO up to and including 150 mm.

Greater thicknesses may be agreed, provided the technical requirements of this European Standard are maintained.

The standard is applicable to steels for offshore structures, designed to operate in the offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may also be applicable in other areas provided that due consideration is given to local conditions e.g. temperature.

NOTE There is an Annex F on the prequalification of steels for fixed offshore structures in arctic areas.

Minimum yield strengths up to 690 MPa are specified together with low temperature impact properties at temperatures down to –40 °C.

Ämnesområden: Stål för värmebehandling
Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 23 nov 2017
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This part of EN 10225 specifies requirements for weldable structural steels to be used in the fabrication of fixed offshore structures in the form of sections (e.g. H-, I-, Z-sections, U-channels, angles and tees) excluding hollow sections. The thickness limitation in this standard is up to and including 63 mm.

For steel qualities with mechanical properties in the transverse direction (named xL2O) sections with flange widths smaller than 180 mm and channels with flange smaller widths than 90 mm cannot be ordered.

Greater thicknesses may be agreed, provided the technical requirements of this European Standard are maintained.

The standard is applicable to steels for offshore structures, designed to operate in the offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may also be applicable in other areas provided that due consideration is given to local conditions e.g. temperature.

NOTE There is an Annex E on the prequalification of steels for fixed offshore structures in arctic areas.

Minimum yield strengths up to 460 MPa are specified together with low temperature impact properties at temperatures down to –40 °C.

Ämnesområden: Stål för värmebehandling
Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: CEN
Svarsdatum: den 23 nov 2017
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This part of EN 10225 specifies requirements for weldable structural steels made of hot finished seamless and high frequency welded hollow sections to be used in the fabrication of fixed offshore structures.

Following thickness limitations are given in this standard:

— for seamless hollow sections up to and including 65 mm;

— for HFW hollow sections up to and including 25,4 mm.

Greater thicknesses may be agreed, provided the technical requirements of this European Standard are maintained.

The standard is applicable to steels for offshore structures, designed to operate in the offshore sector but not to steels supplied for the fabrication of subsea pipelines, risers, process equipment, process piping and other utilities. It is primarily applicable to the North Sea Sector, but may also be applicable in other areas provided that due consideration is given to local conditions e.g. temperature.

NOTE There is an Annex E on the prequalification of steels for fixed offshore structures in arctic areas.

Minimum yield strengths up to 770 MPa are specified together with low temperature impact properties at temperatures down to –40 °C.

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: ISO
Svarsdatum: den 27 nov 2017
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This document is applicable to the minimum requirements for steel sheet, in coils and cut lengths, metallic-coated by the continuous hot-dip process, with aluminium-silicon alloy coating.

The product is intended for heat-resisting applications and also where both corrosion and heat resistance are required.

The steel sheet is produced in a number of quality designations and grades, coating mass, surface treatments and coating finish conditions to be compatible with differing application requirements.

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: ISO
Svarsdatum: den 30 nov 2017
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This document is applicable to the minimum requirements for steel sheet used in the manufacture of corrugated steel pipe, in coils, flat cut lengths, and corrugated cut lengths metallic-coated by the continuous hot-dip process.

This product is intended for storm sewers, culverts, drains, and similar uses.

Several metallic-coated materials are covered which relies on users to determine which product best serves their needs. Four different metallic coatings are included: zinc coated, zinc-5 % aluminium-mischmetal alloy coated, 55 % aluminium-zinc alloy coated and aluminium-silicon alloy-coated

— zinc coated;

— zinc-5 % aluminium-mischmetal alloy coated;

— 55 % aluminium-zinc alloy coated;

— Aluminium-Silicon alloy coated.