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N Mark of structural steel profiles, bars and sheets
Product Sheet/N Mark for steel sections, rods and sheets for structural applications

N Mark of structural steel profiles, bars and sheets

The N Mark for hot-rolled steel sections, rods and sheets for structural applications certifies the product's quality with respect to national UNE standards and European EN standards

​​​​​​​​​​​​​​​The N Mark for hot-rolled steel profiles, bars and sheets for structural applications ensures compliance with the corresponding product standards, guaranteeing customer satisfaction. The objective is to provide proof of compliance with UNE or European standards and with requirements demanded by the customer.

The N Mark for hot-rolled steel sections, rods and sheets for structural applications is accredited by the National Accreditation Body (ENAC) and is recognised by the Ministry of Public Works and Transport as a voluntary mark of quality, which contributes to compliance with basic requirements of the Technical Building Code (CTE).

Hot-rolled steel profiles. HE profiles, wide-flanged and with parallel facesUNE 36524:1994, UNE 36524:1999 ERRATUM, UNE-EN 10025-1:2006, UNE-EN 10034:1994
Hot-rolled steel structural profiles. IPN I-section with pitched flangesUNE 36521:1996, UNE-EN 10024:1995, UNE-EN 10025-1:2006
Hot-rolled steel U profile with parallel flanges (UPE)UNE 36523:2008, UNE 36523:2008 ERRATUM: 2011, UNE-EN 10025-1:2006, UNE-EN 10279:2001
Hot-rolled steel structural profiles. Normal UPN ProfileUNE 36522:2001, UNE-EN 10025-1:2006, UNE-EN 10279:2001
Hot-rolled steel structural profiles. IPE ProfilesUNE 36526:1994, UNE-EN 10025-1:2006, UNE-EN 10034:1994
Hot-rolled steel structural profiles for shoringUNE 36530:1999
Steel staple profiles for shoringUNE 36530:1999
Hot-rolled steel sheets with a thickness greater than or equal to 3 mm for structural applicationsUNE-EN 10025-1:2006, UNE-EN 10029:2011
Structural steel equal and unequal angles (L)UNE-EN 10025-1:2006, UNE-EN 10056-1:1999, UNE-EN 10056-2:1994
Hot-rolled steel round bars for general usesUNE-EN 10025-1:2006, UNE-EN 10060:2004
Hot-rolled steel U profilesUNE 36523:2008 ERRATUM: 2011, UNE 36525:2001, UNE-EN 10025-1:2006, UNE-EN 10279:2001
Hot-rolled steel hexagonal bars for general usesUNE-EN 10025-1:2006, UNE-EN 10061:2005​
Hot-rolled steel square bars for general usesUNE-EN 10025-1:2006, UNE-EN 10059:2004​
Hot-rolled steel rectangular bars for general usesUNE-EN 10025-1:2006, UNE-EN 10058:2004​
Hot-rolled steel T profiles with equal flanges and rounded edgesUNE-EN 10025-1:2006, UNE-EN 10055:1996​

As a compliance assessor, AENOR is a leading product certification entity. With over 100,000 certifications, the AENOR N Mark is present in over 40 countries and is in the top five most widely used product quality marks in the world.

The AENOR N Mark is a voluntary marking that allows a company to demonstrate that its product complies with specific provisions compiled in a UNE, EN or ISO standard or in a technical specification. This display of conformity is based on rigorous monitoring of manufacturing processes and testing of end products carried out by AENOR, and enables holders of the N Mark to place their high-quality certified products on the market and to instil confidence in customers.

Royal Decree 314/2006, of 17 March, approving the Technical Building Code (CTE), is the regulatory framework that establishes the requirements that must be met by buildings in terms of basic safety and habitability aspects, established in Act 38/1999 of 5 November, on Building Standards (LOE).

The AENOR N Mark is recognised by the Ministry of Public Works and Transport as a quality standard of the CTE. This recognition means that the Administration is sufficiently confident in the products certified under the AENOR N Mark considering that the use of these products in buildings contributes to compliance with the basic requirements set forth in legislation. For this reason, use of AENOR N Mark products benefits all agents involved in constructing a building.

This way, the AENOR N Mark can provide the following advantages:

The manufacturer

  • Better understanding of a product due to the exhaustive control the AENOR Mark establishes with respect to the same
  • Products that do not comply with relevant standards or regulations can be detected before they enter the market
  • Decreases production costs as a result of greater control during the manufacturing process
  • There are commercial grounds to introduce the product into new markets and facilitate access to works

Business providers and monitoring agents

  • Fewer or no checks upon delivery are required for goods provided for by the CTE
  • Ensures that products used in works comply with applicable regulatory requirements
  • Guarantee that the product has previously been verified in order to determine compliance with the minimum requirements of basic CTE documents

The end user

  • Properties are built using materials of proven quality
  • Product certified by a renowned entity and global leader in certifying building products

APPLICATION

The AENOR Mark is voluntary. Companies that want AENOR to certify their product must submit their application in accordance with the formats established by AENOR. This application must include information about the company and the characteristics of the products for which certification is sought.

Conformity assessment activities will commence once AENOR experts have analysed the documents to check that the products comply with the applicable standards:

AUDIT/INSPECTION

A visit is made to the production centre to carry out the following procedures:

  • a) the quality management system is audited in accordance with the UNE-EN ISO 9001 requirements that are directly related to the production process.
  • b) The manufacturer's manufacturing process and production controls are inspected to ensure the product complies with the requirements of the standard.
  • c) Samples are taken for testing at the factory and to send to an accredited laboratory to perform the tests included in the standards.

TESTING

The laboratory performs the tests established by the standard and sends its report to AENOR.

GRANTING

Using all the information on the activities performed, the Technical Certification Committee (independent body comprising all the interested parties: manufacturers, the Administration, users, monitoring entities and AENOR) will either propose to AENOR that the Mark be granted, or request that one of the activities be repeated due to non-compliance.

Once the Certificate has been granted, the process will continue as the monitoring activities required to keep it must be performed. Conducts the auditing activities, inspection, sample taking and testing on a semi-annual or annual basis. The result is evaluated by the Technical Certification Committee who decides whether the AENOR certification is retained.​​​

Once the certification process has been completed, organisations obtain: ​

  • The AENOR product certificate
  • A licence to use AENOR's Mark of a certified product, in accordance with the provisions of AENOR regulations
AENOR N Mark logo for a certified product​​​​​

GlobalEPD Declarations

Environmental product declarations (EPD)

EPD for construction steel in accordance with Standard EN 15804

European Passport

​​The CE MARK is a passport for building products

The CE mark provides access to the European Economic Area for construction products