SIST EN 14121:2009

SIST EN 14121:2009 is the Slovenian adoption of EN 14121:2009 from CEN for aluminium and aluminium alloys sheet, strip and plate for electrotechnical applications. It specifies inspection and delivery conditions, mechanical properties, and electrical conductivity for wrought products used in bus bars, other conductors, and similar products that need a minimum electrical conductivity.

What does SIST EN 14121:2009 specify?

SIST EN 14121:2009 covers wrought aluminium and aluminium alloys sheet, strip and plate intended for electrotechnical use. It applies to products with thickness over 0,20 mm up to and including 150 mm.

The document is organized into clauses on scope, normative references, terms and definitions, ordering information, requirements, test methods, inspection documents, marking, packing, and arbitration. The ordering clause tells buyers what to state on an order, while the requirements and test method clauses explain how compliance is checked in practice.

What are the key requirements of SIST EN 14121:2009?

• Ordering information in Clause 4 must identify the product form, aluminium designation, delivery temper, dimensions, tolerances, quantity, inspection document needs, and any special agreed requirements. In practice, this is the information that avoids ambiguity between buyer and manufacturer before production starts.

• Production and quality control in Clause 5 leave manufacturing methods to the manufacturer unless the order says otherwise, but the manufacturer is responsible for inspection and testing before shipment. If the purchaser wants to inspect at the works, that has to be arranged at the time of order.

• Chemical composition in Clause 5 has to comply with EN 573-3. For purchasers, this ties the delivered product to defined alloy chemistry, which matters for conductivity and mechanical performance.

• Mechanical properties and electrical conductivity in Clause 5 are given in Table 1 for each alloy, temper, and thickness range. The table is the main acceptance basis for selecting a product that will actually carry current and still meet the required strength and ductility.

• Freedom from defects in Clause 5 requires a product suitable for proper use, with a smooth and clean surface. Small surface defects are generally permitted if they do not prevent use, and superficial fault removal is allowed only if dimensions and material properties still meet the specification.

• Dimensions, form, and additional properties in Clauses 5 and 6 are controlled by EN 485-3 or EN 485-4 unless another tolerance is agreed. Other properties such as hardness or bending ability can be agreed separately, so these are not automatic unless the order says so.

• Test methods in Clause 6 define how conformity is checked: tensile testing follows EN 10002-1, electrical conductivity uses a documented procedure, and dimensions are measured with suitable instruments. The document also notes that surface finish is examined without magnification unless otherwise specified.

• Documentation, marking, packing, and disputes in Clauses 7 to 10 are handled by agreement and by reference to EN 10204 for inspection documents. If conformity is disputed, arbitration is by a mutually agreed arbitrator whose decision is final.

What terms does SIST EN 14121:2009 define?

• Temper - the delivery condition of the material, specified according to EN 515.
• Tensile strength (Rm) - the maximum stress value used to judge how strongly the material resists pulling.
• 0,2 % proof stress (Rp0,2) - the stress at which a small permanent deformation is reached, used when the material does not show a clear yield point.
• Elongation (A50) - the strain measured after fracture over a stated gauge length, used as an indicator of ductility.
• Brinell hardness (HBW) - a hardness measure used when extra hardness testing is agreed.
• Electrical conductivity - the material’s ability to carry electric current, which is a key property for bus bars and conductors.
• Inspection document - a document issued in accordance with EN 10204 to confirm the delivered product’s inspection status.

Who uses SIST EN 14121:2009?

SIST EN 14121:2009 is used by manufacturers, purchasers, inspectors, and quality staff involved with aluminium sheet, strip, and plate for electrical applications. It is relevant where the product must combine mechanical integrity with a defined level of electrical conductivity, such as in bus bars and other conductors. It also supports ordering, incoming inspection, and supplier quality agreements.

What changed in SIST EN 14121:2009 from the previous edition?

SIST EN 14121:2009 supersedes EN 14121:2003. The foreword states that the revision added EN AW-1370, EN AW-1370A, and EN AW-6101B to Table 1, and corrected the electrical conductivity value for EN AW-1350 and EN AW-1350A in temper H19 to 34,0.

Which standards are used with SIST EN 14121:2009?

• EN 485-3 - tolerances on dimensions and form for hot-rolled products.
• EN 485-4 - tolerances on shape and dimensions for cold-rolled products.
• EN 515 - temper designations used for ordering and delivery.
• EN 573-3 - chemical composition of wrought products.
• EN 10002-1 - tensile test method at ambient temperature.
• EN 10204 - types of inspection documents.
• EN 12258-1:1998 - general aluminium terms and definitions.
• EN 573-5 - codification of standardized wrought products when codified designations are used.
• EN 2004-1 - a referenced method that can be used for conductivity measurement.
• EN ISO 6506-1, ISO 8490, EN 1669 - guidance methods for hardness, Erichsen cupping, and earing tests when these are agreed.

What does the SIST EN 14121:2009 document contain?

The document contains one main property table, Table 1, that links alloy designation, temper, and thickness to mechanical properties and electrical conductivity. It also contains ordering guidance, inspection and test clauses, and practical rules for surface finish, dimensional measurement, inspection documents, marking, packing, and arbitration.

Clause 6 gives the test framework for chemical composition, tensile testing, conductivity measurement, dimensional checks, and surface inspection. The later clauses support purchasing, quality control, and dispute resolution rather than redesigning the material itself.