SIST EN ISO 20482:2014 PDF

Name: SIST EN ISO 20482:2014 — Metallic materials - Sheet and strip - Erichsen cupping test (ISO 20482:2013)
SKU: SIST EN ISO 20482:2014
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Metallic materials - Sheet and strip - Erichsen cupping test (ISO 20482:2013)

Название (английский):

SIST EN ISO 20482:2014

Metallic materials - Sheet and strip - Erichsen cupping test (ISO 20482:2013)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 7 мая 2014 г.
ICS:: 77.040.10
Технический комитет:: IFEK - Ferrous metals

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Описание (английский):

ISO 20482:2013 specifies a standard test method for determining the ability of metallic sheets and strips having a thickness from 0,1 mm up to 2 mm and a width of 90 mm or greater to undergo plastic deformation in stretch forming. For materials that are thicker and when only narrower strips are available, tools of specified dimensions are provided, in which case subscripts are used, as shown in Table 1.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 20482:2013 - "Metallic materials - Sheet and strip - Erichsen cupping test (ISO 20482:2013)" is a CEN-endorsed international test method for assessing the stretch-forming ductility of metallic sheets and strips. The standard defines how to perform the Erichsen cupping test, determining the depth of indentation at the onset of a through crack (the Erichsen cupping index, IE). It applies to sheets and strips with thicknesses from 0.1 mm to 2 mm and widths of 90 mm or greater, with alternate tool dimensions provided for thicker materials or narrower specimens.

Key topics and technical requirements

Test principle: A spherical punch presses a clamped test piece into a die until a through crack appears; the penetration depth h is recorded.

Specimen range: Standard thickness 0.1–2 mm, width ≥90 mm. Subscripted tool sizes specified for thicker or narrower specimens.

Equipment: Die, punch and blank holder with defined dimensions and tolerances (see Table 1 of the standard). Alternatives such as hardened steel balls are permitted.

Surface & hardness: Working surfaces must be rigid; Vickers hardness ≥ 750 HV30. Punch surface roughness Ra ≤ 0.4 µm.

Alignment & holding: Punch axis concentricity within 0.1 mm; blank holder force approximately 10 kN.

Measurement & resolution: Punch movement measured from first contact; gauge division 0.1 mm; thickness measured to 0.01 mm.

Test conditions: General temperature range 10 °C to 35 °C; controlled tests at (23 ± 5) °C. Punch speed 5–20 mm/min (standard) or 5–10 mm/min for narrow specimens.

Procedure & reporting: Minimum of three tests; IE is the average of at least three h readings. Test report must reference ISO 20482 and include specimen identity, thickness, lubricant, appearance after rupture (if required), and IE values.

Lubrication: Graphite grease recommended (calcium soap, refined mineral oil, flake graphite; non-corrosive) - see Annex A.

Applications and users

Manufacturers and quality engineers in automotive, appliance, aerospace, and general metal forming industries use EN ISO 20482 to:

Evaluate sheet/strip formability and ductility for stretch-forming processes.
Compare material lots, coatings or process changes that affect punch/stretch behavior.
Verify supplier claims for sheet metal used in deep drawing or embossing applications.

Test laboratories, material inspectors, and standards compliance teams use this standard for consistent, repeatable Erichsen cupping measurements.

Related standards

ISO 4287 (surface texture/profile method) is referenced for surface roughness definitions.

Developed under ISO/TC 164 (Mechanical testing of metals), Subcommittee SC 2 (Ductility testing).

Keywords: EN ISO 20482:2013, Erichsen cupping test, metallic materials, sheet and strip, Erichsen cupping index, stretch forming, ductility testing, formability test.

SIST EN ISO 20482:2014 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 20482:2013

Metallic materials — Sheet and strip — Erichsen cupping test

BS EN ISO 20482:2013

Metallic materials. Sheet and strip. Erichsen cupping test.

ISO 4287:1997/Amd 1:2009

Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions and surface t…