SIST EN 10314:2016

Method for the derivation of minimum values of proof strength of steel at elevated temperatures

This European Standard specifies a method for deriving the minimum proof strength values for steels at elevated temperatures.
However, this European Standard does not specify a verification procedure.

Verfahren zur Ableitung von Mindestwerten der Dehngrenze von Stahl bei erhöhten Temperaturen

Diese Europäische Norm legt ein Verfahren zur Ableitung der Mindestwerte der Dehngrenze von Stählen bei erhöhter Temperatur fest.
Diese Europäische Norm legt aber kein Verifizierungsverfahren fest.

Méthode de dérivation des valeurs minimales de la limite conventionnelle d'élasticité des aciers à températures élevées

La présente Norme européenne spécifie une méthode de dérivation des valeurs minimales de la limite conventionnelle d'élasticité des aciers à des températures élevées.
Cependant, la présente norme ne spécifie pas une méthode de vérification.

Metoda za izpeljavo najmanjših vrednosti napetosti tečenja jekel pri povišanih temperaturah

Ta evropski standard določa metodo za izpeljavo najmanjših vrednosti napetosti tečenja jekel pri povišanih temperaturah.
Ta standard ne določa postopka preverjanja.

General Information

• Status: Published
• Public Enquiry End Date: 31-Jan-2014
• Publication Date: 03-Jul-2016
• ICS: 77.140.30 - Steels for pressure purposes
• Technical Committee: IFEK - Ferrous metals
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 14-Jun-2016
• Due Date: 19-Aug-2016
• Completion Date: 04-Jul-2016
• Ref Project: EN 10314:2016 - Method for the derivation of minimum values of proof strength of steel at elevated temperatures

Relations

• Replaces: SIST EN 10314:2003 - Method for the derivation of minimum values of proof strength of steel at elevated temperatures
• Effective Date: 08-Jun-2016
• Revised: SIST EN 10314:2003 - Method for the derivation of minimum values of proof strength of steel at elevated temperatures
• Effective Date: 01-Jan-2014

Overview

EN 10314:2016 (CEN) defines a statistical method to derive minimum values of proof strength (Rp) for steels exposed to elevated temperatures. The standard describes how to convert tensile test data at room and elevated temperatures into temperature-dependent minimum proof-strength curves suitable for inclusion in product standards. Important: EN 10314:2016 specifies the derivation method but does not prescribe a verification procedure or test frequency.

Key topics and technical requirements

• Scope: Derivation of minimum proof strength values for steels at elevated temperatures; can be applied to tensile strength or, where only minimum yield at 20 °C exists, adapted to yield strength (Re) with caution.
• Input data: Paired tensile test results from the same product - room temperature (EN ISO 6892-1) and elevated temperature (EN ISO 6892-2).
• Data grouping: Apply the method separately by steel grade, product form, heat-treatment range, thickness range and test-piece location/orientation.
• Ratio values f(t): Normalize elevated-temperature property to room-temperature value (f(t) = property(t) / property(20 °C)). Each data set produces a result set of f(t) vs. temperature.
• Trend curve: Fit a trend through ratio data that passes through 1.0 at room temperature (commonly a polynomial degree 1–4 using least-squares). Check for multiple populations and separate if needed.
• Derivation rules: Use the trend-average fav(t) and prescribed formulae (different branches depending on fav(t) threshold, notably fav(t) ≈ 0.4) to calculate Rp(t)min. The method incorporates residual scatter and conservative offsets to represent lower confidence levels.
• Minimum dataset: At least 8 data sets, with temperature intervals typically 50–100 °C, and overall ≥80% coverage of selected temperature points. Data should preferably come from multiple sources.
• Data quality: Examine consistency; discard non-representative data. Final results require visual inspection and agreement with the data supplier.

Applications and users

• Who uses it: Standards developers, product specification writers, material engineers, testing laboratories, steel manufacturers, and designers of pressure equipment.
• Practical uses: Deriving tabulated minimum Rp(t) values for product standards; reducing the need for routine elevated-temperature tensile testing when validated minimums are available; supporting design calculations for pressure vessels, boilers and high-temperature components where elevated-temperature strength properties are required.

Related standards

• EN ISO 6892-1 (tensile testing at room temperature)
• EN ISO 6892-2 (tensile testing at elevated temperature)
• Historical references: ENV/ISO 2605 series (ENV 22605), which informed earlier procedures

EN 10314:2016 is a practical, statistically based approach for producing conservative, representative minimum proof-strength curves for steels used in elevated-temperature service.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.WHPSHUDWXUDKVerfahren zur Ableitung von Mindestwerten der Dehngrenze von Stahl bei erhöhten TemperaturenMéthode de dérivation des valeurs minimales de la limite conventionnelle d'élasticité des aciers à températures élevéesMethod for the derivation of minimum values of proof strength of steel at elevated temperatures77.140.30Jekla za uporabo pod tlakomSteels for pressure purposesICS:Ta slovenski standard je istoveten z:EN 10314:2016SIST EN 10314:2016en,fr,de01-september-2016SIST EN 10314:2016SLOVENSKI
STANDARDSIST EN 10314:20031DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10314
June
t r s x ICS
y yä s v rä u r Supersedes EN
s r u s vã t r r tEnglish Version
Method for the derivation of minimum values of proof strength of steel at elevated temperatures Méthode de dérivation des valeurs minimales de la limite conventionnelle d 5élasticité des aciers à températures élevées
Verfahren zur Ableitung von Mindestwerten der Dehngrenze von Stahl bei erhöhten Temperaturen This European Standard was approved by CEN on
s z March
t r s xä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
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t r s x CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s r u s vã t r s x ESIST EN 10314:2016

Significant changes to the previous version EN 10314:2002 . 10 Bibliography. 11
«2 and
«3, sets out a method for deriving minimum proof strength values for steels at elevated temperatures with the intention that such values are specified in relevant product standards. This European Standard does not specify a frequency of testing for the product standards where EN 10314 is applied. Verification of tensile properties at elevated temperatures is normally specified in the relevant product standard using the minimum property values derived by the procedure established in this European Standard. The method has been tested for proof strength values of steel. However, it is considered that the method can also be applied for the derivation of minimum values of tensile strength at elevated temperatures. SIST EN 10314:2016
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