EN 1748-2-1:2004
(Main)Glass in building - Special basic products - Glass ceramics - Part 2-1 Definitions and general physical and mechanical properties
Glass in building - Special basic products - Glass ceramics - Part 2-1 Definitions and general physical and mechanical properties
This document defines, specifies and classifies glass ceramics for use in building. It indicates their chemical composition, main physical and mechanical properties, dimensional and minimum quality requirements (in respect of optical and visual faults).
This document applies to glass ceramics supplied in stock sizes or in cut sizes for final end use.
This document does not apply to final cut sizes having a dimension less than 100 mm or a surface area less than 0,05 m².
Glas im Bauwesen - Spezielle Basiserzeugnisse - Glaskeramik - Teil 2-1: Definitionen und allgemeine physikalische und mechanische Eigenschaften
Dieses Dokument definiert, spezifiziert und klassifiziert Glaskeramikerzeugnisse für das Bauwesen. Es macht Angaben über deren chemische Zusammensetzung, wesentliche physikalischen und mechanischen Eigen-schaften, Maße und Mindestanforderungen an die Qualität (hinsichtlich optischer und sichtbarer Fehler).
Dieses Dokument gilt nur für Glaskeramikerzeugnisse, die in Standardabmessungen oder in Festmaßen geliefert werden.
Dieses Dokument gilt nicht für Glas in Festmaßen von weniger als 100 m oder mit einer Oberfläche von weniger als 0,05 m2.
Verre dans la construction - Produits de base spéciaux - Vitrocéramiques - Partie 2-1: Définitions et propriétés physiques et mécaniques générales
Le présent document définit, spécifie et classe les vitrocéramiques à utiliser en construction. Elle indique leur composition chimique, leurs principales propriétés physiques et mécaniques, leurs exigences dimensionnelles et qualitatives minimales (compte tenu des défauts optiques et d'aspect). Le présente document s'applique aux vitrocéramiques fournis en dimensions standard ou découpées en mesures fixes en vue de leur usage final.
Le présent document ne s'applique pas aux vitrocéramiques découpées en mesures fixes en vue de leur usage final dont l'une des dimensions est inférieure à 100 mm ou dont l'aire de la surface est inférieure à 0,05 m2.
Steklo v stavbah - Posebni osnovni proizvodi – Steklena keramika – 2-1. del: Definicije in splošne fizikalne in mehanske lastnosti
General Information
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Overview
EN 1748-2-1:2004 - Glass in building - Special basic products - Glass ceramics - Part 2‑1 is a CEN European Standard that defines, classifies and specifies the basic properties of glass ceramics intended for use in building. It sets out required chemical composition ranges, general physical and mechanical characteristics, dimensional requirements (stock sizes and final cut sizes) and minimum quality criteria for optical and visual faults. The standard applies to stock or cut sizes down to 100 mm (minimum surface 0.05 m²) and refers to measurement of light transmittance according to EN 410.
Key topics and technical requirements
- Scope & definitions
- Clear definitions for product types (floated, drawn, rolled, cast glass ceramics), terms such as stock sizes, final cut sizes, optical faults, spot faults and linear/extended faults.
- Chemical composition
- Typical constituent ranges (by mass): SiO2 50–80%, Al2O3 15–27%, and permitted ranges for Li2O, ZnO, TiO2, ZrO2, MgO, CaO, BaO, Na2O, K2O and others.
- Physical & mechanical properties
- Conventional values (for design reference, not strict tolerances): density (
2500–2600 kg/m³), Knoop hardness, Young’s modulus, Poisson’s ratio, characteristic bending strength, specific heat, thermal conductivity, refractive index (1.5) and emissivity. - Noted thermal stability (resistance to sudden temperature change) and low/near‑zero coefficient of linear expansion between 20 °C and 300 °C.
- Conventional values (for design reference, not strict tolerances): density (
- Optical classification
- Definition of clear glass ceramics by minimum light transmittance values for nominal thicknesses (3–8 mm: e.g., 0.86 down to 0.76). Measurement per EN 410; guidance on pre‑treatment (removal of coatings, polishing).
- Dimensional requirements & tolerances
- Stock sizes: nominal length 500–3300 mm, width 500–2300 mm. Thickness nominally 3–8 mm with thickness tolerance ±0.5 mm; rules for length/width/squareness tolerances and final cut size limits.
- Quality assessment
- Methods for detecting optical faults (reticulated screen test: screen, viewing distances and geometry specified) and measuring spot and linear faults, plus edge defect definitions and acceptance levels.
Applications and users
Who uses EN 1748-2-1:2004:
- Glass ceramics manufacturers - product specification, production quality control and labelling.
- Architects, façade and structural engineers - material selection and performance assumptions for glazing and cladding.
- Glaziers, fabricators and specifiers - defining stock and final cut size tolerances, acceptance criteria for faults.
- Test laboratories and conformity assessors - performing optical/visual inspections and dimensional measurements.
- Building product procurement teams - setting contractual acceptance criteria for delivered panes.
Practical uses:
- Specifying glass ceramics for windows, façades, partitions, solar/thermal elements where low thermal expansion and stable optical properties are required.
- Establishing inspection protocols and limits for acceptance/rejection of supplied panes.
Related standards
- EN 410 (measurement of luminous and solar characteristics) - referenced for light transmittance tests.
- EN 1748‑2‑2 (Product standard / evaluation of conformity) - companion document covering conformity assessment.
Frequently Asked Questions
EN 1748-2-1:2004 is a standard published by the European Committee for Standardization (CEN). Its full title is "Glass in building - Special basic products - Glass ceramics - Part 2-1 Definitions and general physical and mechanical properties". This standard covers: This document defines, specifies and classifies glass ceramics for use in building. It indicates their chemical composition, main physical and mechanical properties, dimensional and minimum quality requirements (in respect of optical and visual faults). This document applies to glass ceramics supplied in stock sizes or in cut sizes for final end use. This document does not apply to final cut sizes having a dimension less than 100 mm or a surface area less than 0,05 m².
This document defines, specifies and classifies glass ceramics for use in building. It indicates their chemical composition, main physical and mechanical properties, dimensional and minimum quality requirements (in respect of optical and visual faults). This document applies to glass ceramics supplied in stock sizes or in cut sizes for final end use. This document does not apply to final cut sizes having a dimension less than 100 mm or a surface area less than 0,05 m².
EN 1748-2-1:2004 is classified under the following ICS (International Classification for Standards) categories: 01.040.81 - Glass and ceramics industries (Vocabularies); 81.040.20 - Glass in building. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1748-2-1:2004 has the following relationships with other standards: It is inter standard links to EN 1748-2:1997, prEN 1748-2-1. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 1748-2-1:2004 is associated with the following European legislation: EU Directives/Regulations: 305/2011, 89/106/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase EN 1748-2-1:2004 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steklo v stavbah - Posebni osnovni proizvodi – Steklena keramika – 2-1. del: Definicije in splošne fizikalne in mehanske lastnostiGlas im Bauwesen - Spezielle Basiserzeugnisse - Glaskeramik - Teil 2-1: Definitionen und allgemeine physikalische und mechanische EigenschaftenVerre dans la construction - Produits de base spéciaux - Vitrocéramiques - Partie 2-1: Définitions et propriétés physiques et mécaniques généralesGlass in building - Special basic products - Glass ceramics - Part 2-1
Definitions and general physical and mechanical properties81.040.20Steklo v gradbeništvuGlass in building01.040.81Glass and ceramics industries (Vocabularies)ICS:Ta slovenski standard je istoveten z:EN 1748-2-1:2004SIST EN 1748-2-1:2004en01-november-2004SIST EN 1748-2-1:2004SLOVENSKI
STANDARDSIST EN 1748-1:19991DGRPHãþD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1748-2-1September 2004ICS 01.040.81; 81.040.20Supersedes EN 1748-2:1997
English versionGlass in building - Special basic products - Glass ceramics -Part 2-1
Definitions and general physical and mechanicalpropertiesVerre dans la construction - Produits de base spéciaux -Partie 2-1 Vitrocéramiques - Définition et descriptionGlas im Bauwesen - Spezielle Basiserzeugnisse -Glaskeramik - Teil 2-1: Definitionen und allgemeinephysikalische und mechanische EigenschaftenThis European Standard was approved by CEN on 21 June 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1748-2-1:2004: ESIST EN 1748-2-1:2004
This document (EN 1748-2-1:2004) has been prepared by Technical Committee CEN /TC 129 "Glass in Building", the secretariat of which is held by BIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2005, and conflicting national standards shall be withdrawn at the latest by March 2005.
This document supersedes EN 1748-2:1997. This document consists of the following parts: EN 1748-2-1
Glass in building - Special basic products
- Glass ceramics –Part 2 – 1: Definitions and general physical and mechanical properties EN 1748-2-2
Glass in building - Special basic products
- Glass ceramics – Part 2-2: Evaluation of conformity/Product standard According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
It indicates their chemical composition, main physical and mechanical properties, dimensional and minimum quality requirements (in respect of optical and visual faults). This document applies to glass ceramics supplied in stock sizes or in cut sizes for final end use. This document does not apply to final cut sizes having a dimension less than 100 mm or a surface area less than 0,05 m². 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 410, Glass in building - Determination of luminous and solar characteristics of glazing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 glass ceramics type of glass consisting of a crystalline and a residual glass phase. The glass is obtained by normal glass manufacturing methods, e.g. casting, floating, drawing, rolling and is subsequently subjected to a heat treatment which transforms, in a controlled manner, part of the glass into a fine grained crystalline phase. The glass ceramics has properties which deviate from those of the glass from which it was transformed. 3.2 floated glass ceramics flat, transparent or translucent, clear or tinted glass ceramics having parallel and polished faces obtained by continuous casting and flotation on a metal bath. 3.3 drawn sheet glass ceramics flat, transparent or translucent, clear or tinted glass ceramics obtained by continuous drawing, initially vertically, of a regular thickness and with the two surfaces fire polished. 3.4 rolled glass ceramics flat, transparent or translucent, clear or tinted glass ceramics obtained by rolling. 3.5 cast glass ceramics flat, transparent or translucent, clear or tinted glass ceramics obtained by casting. 3.6 nominal length, H and nominal width, B pane length or pane width defined with reference to the direction of draw
of the glass ceramics ribbon as shown in Figure 1. SIST EN 1748-2-1:2004
Key : Direction of draw Figure 1 — Relationship of length, width and direction of draw 3.7 stock sizes glass ceramics delivered in manufacturers standard stock sizes. 3.8 final cut size pane of glass ceramics that has been cut down to the dimensions being required either for installation or processing into a final product e.g. insulating glass units. 3.9 optical faults faults, which lead to distortions on the appearance of objects observed through the glass ceramics. 3.10 visual faults faults, which alter the visual quality of the glass ceramics. They are spot faults and linear / extend faults. 3.11 spot faults spot fault is a nucleus, which is sometimes accompanied by a halo of distorted glass ceramics. The dimension of a spot fault comprising a nucleus with a halo is obtained by multiplying the dimension of the nucleus by a factor of approximately 3. 3.12 linear / extended faults these faults can be on or in the glass ceramics, in the form of deposits, marks or scrat
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EN 1748-2-1:2004 표준 문서는 건축에 사용되는 유리 세라믹의 정의, 분류 및 특성을 명확하게 규명합니다. 이 문서는 유리 세라믹의 화학 조성, 주요 물리적 및 기계적 특성, 치수 및 광학적 결함과 시각적 결함과 관련된 최소 품질 요구 사항을 상세히 설명하고 있습니다. 이는 이 표준이 건축 자재의 안전성과 신뢰성을 보장하는 데 필수적임을 시사합니다. 이 표준의 가장 큰 강점은 유리 세라믹의 다양한 사용 용도에 따라 명확한 지침을 제공하여, 건축 전문가들이 제품의 성능을 예측하고 최적의 재료를 선택할 수 있도록 돕는다는 점입니다. 또한, 이 문서에서는 상비 크기 또는 최종 용사를 위한 절단 크기로 공급되는 유리 세라믹에 적용되므로, 다양한 현실적 환경에서 실제적으로 유용하게 활용될 수 있습니다. 표준은 최종 절단 크기가 100 mm보다 작거나 표면적이 0.05 m² 미만인 경우에는 적용되지 않음을 분명히 하여, 유리 세라믹의 안전성과 기능성을 보장하기 위한 명확한 경계를 설정합니다. 이러한 조건은 건축 현장에서의 실제 사용에 있어 품질 관리의 중요성을 강조합니다. 결론적으로, EN 1748-2-1:2004 표준은 유리 세라믹의 특성과 사용에 대한 종합적인 이해를 제공하며, 건축 자재 선택에 있어 필수적인 기준으로 기능하고 있습니다. 이를 통해 건축 업계는 보다 안전하고 효율적인 건축 자재를 사용할 수 있는 토대를 마련하게 됩니다.
SIST EN 1748-2-1:2004は、建築に使用されるガラスセラミックスに関する基準を提供しており、その定義、仕様、分類を明確にしています。この文書はガラスセラミックスの化学組成、主要な物理的および機械的特性、寸法要件および光学的・視覚的欠陥に関する最小品質要件を示しています。 この標準の強みは、建築分野におけるガラスセラミックスの特性を詳細に定義することで、製品の品質保証に寄与する点です。このガイドラインにより、設計者や建築業者は適切な材料を選択し、性能基準を満たす製品を確保できるため、建物の総合的な品質を向上させることができます。 さらに、SIST EN 1748-2-1:2004は、ストックサイズまたは最終用途のために切断されたサイズのガラスセラミックスに適用され、幅広い市場ニーズに対応しています。ただし、最終的な切断サイズに関する制限があり、100mm未満の寸法または0.05m²未満の表面積を持つものには適用されない点に注意が必要です。 このドキュメントは、ガラスセラミックスを使用した具体的なアプリケーションにおける信頼性を高め、業界全体での品質基準を統一するための重要なリソースであり、その関連性は非常に高いと言えます。
EN 1748-2-1:2004 serves as a crucial standard that delineates the parameters and benchmarks for glass ceramics utilized in building applications. The scope of this document is comprehensive, covering the definitions, specifications, and classifications pertinent to glass ceramics. It systematically outlines the chemical composition essential for quality assurance, alongside the main physical and mechanical properties that materials must exhibit to be considered suitable for building purposes. One of the strengths of EN 1748-2-1:2004 is its focus on the dimensional requirements and minimum quality standards that are critical in ensuring the performance and reliability of glass ceramics in real-world applications. By addressing optical and visual faults, the standard ensures that any glass ceramics used meet a set of aesthetic and functional criteria that are vital for architectural and construction integrity. The document's applicability extends to glass ceramics supplied in both stock sizes and those cut to specific dimensions for final use, demonstrating its versatility in addressing a range of manufacturing and implementation scenarios. However, it notably excludes any cut sizes with dimensions under 100 mm or surface areas smaller than 0.05 m², providing clarity on the conditions under which the standard applies. Overall, EN 1748-2-1:2004 is a vital resource that underscores the significance of quality assurance in the use of glass ceramics in the building sector. Its thorough approach to defining key properties and standards makes it highly relevant for manufacturers, builders, and architects who require reliable materials that comply with established criteria in the construction industry.
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