SIST EN 2935:2001

Aerospace series - Bolts, T-head, relieved shank, long thread, in heat resisting nickel base alloy NI-P101HT (Waspaloy) - Classification: 1 210 MPa (at ambient temperature)/730°C

This standard specifies the characteristics of T-headed bolts with relieved shank, long thread, in NI-P101HT, for aerospace applications. Classification: 1 210 MPa / 730 °C

Luft- und Raumfahrt - T-Kopfschrauben, Dünnschaft, langes Gewinde, aus hochwarmfester Nickelbasislegierung NI-P101HT (Waspaloy) - Klasse: 1 210 MPa (bei Raumtemperatur)/730°C

Diese Norm legt die Eigenschaften von T-Kopfschrauben mit Dünnschaft und langem Gewinde, aus NI-P101HT, zur Verwendung in der Luft- und Raumfahrt fest. Klasse: 1 210 MPa / 730 °C

Série aérospatiale - Vis a tete en T, fut dégagé, filetage long, en alliage résistant a chaud a base de nickel NI-P101HT (Waspaloy) - Classification: 1210 MPa (a température ambiante)/730°C

La présente norme spécifie les caractéristiques des vis à tête en T, à fût dégagé, à filetage long, en NI-P101HT, pour les applications aérospatiales. Classification: 1 210 MPa / 730 °C

Aerospace series - Bolts, T-head, relieved shank, long thread, in heat resisting nickel base alloy NI-P101HT (Waspaloy) - Classification: 1 210 MPa (at ambient temperature)/730 °C

General Information

• Status: Published
• Publication Date: 31-Dec-2000
• ICS: 49.030.20 - Bolts, screws, studs
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2001
• Due Date: 01-Jan-2001
• Completion Date: 01-Jan-2001
• Ref Project: EN 2935:1996 - Aerospace series - Bolts, T-head, relieved shank, long thread, in heat resisting nickel base alloy NI-P101HT (Waspaloy) - Classification: 1 210 MPa (at ambient temperature)/730°C

Overview

SIST EN 2935:2001 defines the technical requirements and characteristics for aerospace bolts featuring a T-head, relieved shank, and long thread, fabricated from heat-resisting nickel base alloy NI-P101HT (Waspaloy). This standard addresses the use of high-strength fasteners rated at 1 210 MPa (at ambient temperature) suitable for elevated-temperature service up to 730°C, making them ideal for critical aerospace applications. Established by the Slovenski inštitut za standardizacijo (SIST), this standard aligns with EN 2935:1996, ensuring compatibility and recognition within the broader European aerospace community.

Key Topics

• Material Specification: The bolts are manufactured from nickel base alloy NI-P101HT (Waspaloy), offering superior mechanical properties and oxidation resistance at high temperatures.
• Design Features: Includes requirements for T-head design, relieved shank, and extended thread length, supporting both performance and assembly needs in aerospace applications.
• Strength Classification: Rated for a minimum tensile strength of 1 210 MPa at ambient temperature, with reliable performance up to 730°C.
• Dimensional Requirements: Provides restrictions and guidelines for dimensions, tolerances, and surface finish to ensure interchangeability and consistent quality.
• Performance Criteria: Focuses on characteristics such as mechanical strength, resistance to thermal stress, and long-term durability in demanding aerospace environments.

Applications

Bolts specified under SIST EN 2935:2001 are used in a variety of aerospace contexts, owing to their robust construction and heat-resistant properties. Typical applications include:

• Aircraft Engines: Ideal for fastening components exposed to high temperatures and dynamic loads, such as turbine casings and engine mounts.
• Aircraft Structure: Applied in locations requiring high-strength, reliable connections, particularly where standard hex head bolts are impractical due to space constraints or assembly considerations.
• Spacecraft Assemblies: Suitable for thermal and mechanical environments beyond standard operating ranges, including launch vehicles and satellite mechanisms.
• Maintenance and Repairs: Critical for replacement and overhaul of components in high-performance aerospace engines and structures, ensuring compliance with industry best practices.

Related Standards

To ensure comprehensive compliance and compatibility, the following related aerospace fastener standards should also be considered:

• EN 2935:1996: The European base reference for T-head, relieved shank, long thread bolts in NI-P101HT (Waspaloy), with which this SIST standard is harmonized.
• EN 2874: Outlines requirements for similar fasteners but with different alloys or geometric features.
• ISO 898-1: Covers mechanical properties of fasteners made from various materials, providing context for strength and performance classifications.
• SIST EN 2002-002: Specifies testing procedures for aerospace fasteners, crucial for verification of mechanical and thermal properties.

Practical Value

Adopting the requirements of SIST EN 2935:2001 supports:

• Enhanced Safety: Use of high-strength, reliable fasteners minimizes the risk of failure in mission-critical aerospace assemblies.
• Interchangeability: Standardized dimensions and materials ensure compatibility across international supply chains and manufacturing environments.
• Performance Assurance: Strict classification for high temperature and high-strength usage facilitates superior service life in challenging aerospace conditions.
• Industry Compliance: Meeting the standard ensures conformity to both Slovenian and European regulations for aerospace hardware.

For manufacturers, designers, and maintenance professionals, understanding and applying SIST EN 2935:2001 ensures robust, safe, and efficient aerospace assemblies, promoting reliability and quality in high-performance environments.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Bolts, T-head, relieved shank, long thread, in heat resisting nickel base alloy NI-P101HT (Waspaloy) - Classification: 1 210 MPa (at ambient temperature)/730 °CLuft- und Raumfahrt - T-Kopfschrauben, Dünnschaft, langes Gewinde, aus hochwarmfester Nickelbasislegierung NI-P101HT (Waspaloy) - Klasse: 1 210 MPa (bei Raumtemperatur)/730°CSérie aérospatiale - Vis a tete en T, fut dégagé, filetage long, en alliage résistant a chaud a base de nickel NI-P101HT (Waspal
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