Metallurgi

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: ISO
Svarsdatum: den 3 mar 2020
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This document specifies the requirements for hot-rolled twin-roll cast steel sheet of commercial quality.

The product is intended for many applications where the presence of oxide or scale or normal surface imperfections disclosed after removal of oxide or scale, are not objectionable. It is not suitable for applications where the surface is of prime importance.

NOTE This document does not cover steel sheet that is to be subjected to subsequent rolling.

Kommittébeteckning: SIS/TK 133 (Pulvermetallurgi)
Källa: ISO
Svarsdatum: den 10 mar 2020
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This International Standard specifies a generic test method to determine the abrasion wear characteristics of hardmetals.

The procedure complements the ASTM G65 method for dry sand/rubber wheel abrasion, the ASTM B611 method for determining the high stress abrasion of hard materials, and the ASTM G105 method for conducting wet sand/rubber wheel abrasion tests.

The test is appropriate for use in situations where test laboratories have a need to simulate abrasive damage. The procedure includes information which enables the test to be used in a variety of different conditions:

a) with counterface wheels of different stiffness (for example steel and rubber);

b) wet and dry;

c) different abrasive sizes;

d) different chemical environments.

Ämnesområden: Korrosion
Kommittébeteckning: SIS/TK 146/AG 64 (Korrosion i jord och vätskor)
Källa: ISO
Svarsdatum: den 22 mar 2020
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This standard specifies the methodology of using multielectrode arrays for measurement of the corrosion, especially localized corrosion, of metals and alloys. It can be used as a powerful tool for studying the initiation and propagation processes of localized corrosion. It is also a useful tool for long-term corrosion monitoring in the field, especially for localized corrosion, and for obtaining high throughput results for the evaluation of metals with different compositions and/or physical properties in different environments and the screening of a large number of inhibitors. Additionally, the galvanic coupling current and potential distribution of dissimilar metal parings can be assessed by multielectrode arrays. Multielectrode arrays can be implemented in full-immersion, thin-film, spray, and alternating wet-dry cycle exposures.

This standard is not intended to be used for measurements of corrosion caused by non-electrochemical mechanism.

Kommittébeteckning: SIS/TK 142 (Konstruktionsstål)
Källa: ISO
Svarsdatum: den 24 mar 2020
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This document specifies qualities for steels for general structural use. This document applies to steel plates rolled on a reversing mill, wide flats, hot-rolled sections and bars, which are used in the as-delivered condition and normally intended for welded or bolted structures.

This document covers 8 steel grades and 4 qualities. Grades S235, S275, S355, and S460 are covered in Annex A. Grades SG205, SG250, SG285 and SG345 are covered in Annex B. Not all grades are available in all qualities, and some qualities have Charpy V-notch requirements.

The steels specified in this document are applicable to hot-rolled flat products and sections with a minimum nominal thickness of 3 mm and a maximum nominal thickness of 400 mm for grades S235, S275, S355, a maximum nominal thickness of 150 mm for grade S460 only for long products, and no restriction on nominal thickness for grades SG205, SG250, SG285, and SG345 for flat products, sections and long products,

This document does not include the following structural steels, some of which are covered by other International Standards:

— sheet and strip: refer to ISO TC 17/SC 12 "Continuous mill flat rolled products";

— tubular products: refer to ISO TC 5/SC 1 "Steel tubes".

NOTE 1 Lists of standards covered by ISO/TC 17/SC 12 and ISO/TC 5/SC 1 are available on the ISO Web site.

NOTE 2 In all parts of ISO 630, the term of "thickness" is considered as "nominal thickness", unless otherwise stated.

Ämnesområden: Korrosion
Kommittébeteckning: SIS/TK 146 (Korrosion)
Källa: ISO
Svarsdatum: den 28 mar 2020
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This document specifies procedures for the removal of corrosion products formed on metal and alloy corrosion test specimens during their exposure in corrosive environments. For the purpose of this document, the term "metals" refers to pure metals and alloys.

The specified procedures are designed to remove all corrosion products without significant removal of base metal. This allows an accurate determination of the mass loss of the metal, which occurred during exposure to the corrosive environment.

These procedures may, in some cases, also be applied to metal coatings. However, possible effects from the substrate must be considered.

NOTE If a significant portion of the substrate is visible after the pickling procedure is completed, the results will be unreliable.

Kommittébeteckning: SIS/TK 123 (Mekanisk provning)
Källa: ISO
Svarsdatum: den 28 mar 2020
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This International Standard specifies the conditions for conducting plane bending fatigue test on axial machine, constant-amplitude, force or displacement controlled, at room temperature (ideally between 10°C and 35°C) on metallic specimens, without deliberately introduced stress concentrations. This International standard does not include reversed/partially loading test. The purpose of test while using this International Standard is to provide relevant results, such as the relation between applied stress and number of cycles to failure for a given material condition, expressed by hardness and microstructure, at various stress ratios.

Although the shape, preparation and testing of specimens of rectangular and beveled cross-section are specified; component testing and other specialized forms of testing are not included in this International Standard.

NOTE 1 Fatigue tests on notched specimens are not covered by this International Standard since the shape and size of notched test pieces have not been specified in any standard so far. Guidelines are given in Annex A. However, it is permitted to use the fatigue-test procedures described in this standard for testing of such notched specimens.

NOTE 2 There is a possibility of getting the results of a fatigue test be affected by atmospheric conditions, and where controlled conditions are required, subclause 2.1 of ISO 554 applies.

Kommittébeteckning: SIS/TK 261 (Maskinsäkerhet i järn- och metallverk)
Källa: CEN
Svarsdatum: den 1 apr 2020
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This document defines the general safety requirements of strip processing lines.

This document applies to:

Strip processing lines for treating metal strip, from

— coil take-over-point of the entry section (terminal equipment, see 3.2) through the

— process (processing and terminal equipment, see 3.3 and 3.2) up to the

— coil take-over-point of the exit section or interface to other lines (terminal equipment), see Figure 1.

 

 

NOTE 1 The aforementioned processes can also occur in combination.

If the aforementioned processes will be combined with processes which are not covered by the scope of this standard, this standard can be used as a guideline.

NOTE 2 Thermo process equipment integrated in strip processing lines is covered by the EN 746 series. For dryers and ovens, in which flammable substances are released, EN 1539 applies.

This document does not cover:

— thermo process equipment, e.g. in accordance with the EN 746 series;

— dryers and ovens in accordance with EN 1539;

— coil transporting system before coil take-over-point at the entry section and after coil take-over-point at the exit section, e.g. hook conveyors, overhead cranes, fork lift and railway trucks and other vehicles;

— acid regeneration plants;

— regeneration plants which are not integral part of the strip processing line;

— storage equipment for coils;

— rolling mill stands (i.e. skin pass and reduction stands) according to EN 15094;

— rollshop equipment;

— separate process technology (e.g. compressed air system, treatment of water and treatment of rolling lubricant);

— separate cleaning system for exhaust air;

— firefighting systems.

NOTE 3 Protection of persons in case of using asphyxiant gases used in firefighting system is covered by this document, see Annex C.

This document deals with foreseeable significant hazards, hazardous situations and events relevant to strip processing lines, when used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer. It provides the requirements to be met by the manufacturer to ensure the safety of persons and property during transport, commissioning, use, de-commissioning and maintenance periods, as well as in the event of foreseeable failures or malfunctions that can occur in the equipment.

For modernization, this document (C-type standard) can be applied for the part to be modernized.

 

 

 

Kommittébeteckning: SIS/TK 261 (Maskinsäkerhet i järn- och metallverk)
Källa: CEN
Svarsdatum: den 8 apr 2020
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This document specifies the general safety requirements for finishing lines for metal strip, hereafter referred as finishing line(s), as defined in 3.1.

This document deals with significant hazards, hazardous situations and events relevant for finishing lines when used as intended and under conditions foreseen by the manufacturer. This document provides the requirements to be met by the manufacturer to ensure the safety of persons and property during transport, commissioning, operation and de-commissioning, as well as in the event of foreseeable failures or malfunctions that can occur in the equipment (see Clauses 4 and 5).

This document is applicable to:

Plant (machinery, equipment, devices) for the customer-specific processing of metal strip/metal foil (starting material: hot rolled or cold rolled strip as coil) from the material feeding (1) via the finishing process (2) until the material removal (3) (see exemplary layout in Figure 1).

Kommittébeteckning: SIS/TK 123 (Mekanisk provning)
Källa: ISO
Svarsdatum: den 10 apr 2020
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This document specifies methods for determining fracture toughness in terms of K, δ, J and R-curves for homogeneous metallic materials subjected to quasistatic loading. Specimens are notched, precracked by fatigue and tested under slowly increasing displacement. The fracture toughness is determined for individual specimens at or after the onset of ductile crack extension or at the onset of ductile crack instability or unstable crack extension. In some cases in the testing of ferritic materials, unstable crack extension can occur by cleavage or ductile crack initiation and growth, interrupted by cleavage extension. The fracture toughness at crack arrest is not covered by this document. In cases where cracks grow in a stable manner under ductile tearing conditions, a resistance curve describing fracture toughness as a function of crack extension is measured. In most cases, statistical variability of the results is modest and reporting the average of three or more test results is acceptable. In cases of cleavage fracture of ferritic materials in the ductile-to-brittle transition region, variability can be large and additional tests may be required to quantify statistical variability. Special testing requirements and analysis procedures are necessary when testing weldments and these are described in ISO 15653[1] which is complementary to this document.

When fracture occurs by cleavage or when cleavage is preceded by limited ductile crack extension, it may be useful to establish the reference temperature for the material by conducting testing and analysis in accordance with ASTM E1921.[2]

Ämnesområden: Kopparprodukter
Kommittébeteckning: SIS/TK 132 (Koppar)
Källa: CEN
Svarsdatum: den 16 apr 2020
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This document specifies the composition, property requirements including electrical properties, and tolerances on dimensions and form for copper profiles and profiled wire for electrical purposes, which would fit within a circumscribing circle of maximum 180 mm diameter.

The sampling procedures, the test methods for verification of conformity to the requirements of this document, and the delivery conditions are also specified.

Ämnesområden: Kopparprodukter
Kommittébeteckning: SIS/TK 132 (Koppar)
Källa: CEN
Svarsdatum: den 16 apr 2020
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This European Standard specifies the composition, property requirements including electrical properties, and tolerances on dimensions and form for copper rod, bar and wire for general electrical purposes. Cross sections and size ranges are: - round, square and hexagonal rod with diameters or widths across flats from 2 mm up to and including 160 mm; - bar with thicknesses from 2 mm up to and including 40 mm and widths from 3 mm up to and including 250 mm; - round, square, hexagonal and rectangular wire with diameters or widths across flats from 2 mm up to and including 25 mm, as well as thicknesses from 0,5 mm up to and including 12 mm with widths from 1 mm up to and including 250 mm. The sampling procedures and test methods for verification of conformity to the requirements of this standard are also specified. NOTE Drawn, round copper wire - plain or tinned, single or multiline - for the manufacture of electrical conductors is specified in EN 13602.

Kommittébeteckning: SIS/TK 132 (Koppar)
Källa: CEN
Svarsdatum: den 16 apr 2020
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This European Standard specifies methods for assessing the tin coating on drawn round copper wire for the manufacture of electrical conductors, e.g. according to EN 13602. This European Standard includes test methods for the determination of the following characteristics: a) thickness of the unalloyed tin coating; b) continuity of the tin coating; c) adherence of the tin coating. WARNING - This European Standard can involve the use of hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems associated with their use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.