EN 16602-70-71:2016

Space product assurance - Materials, processes and their data selection

This Standard specifies the requirements applicable to materials, processes and their data selection to satisfy the mission performance requirements.
This Standard covers the following:
•   selection criteria and rules;
•   utilization criteria and rules.
The provisions of this Standard apply to all actors involved at all levels in the production of space systems. These can include manned and unmanned spacecraft, launchers, satellites, payloads, experiments, electrical ground support equipment, mechanical ground support equipment, and their corresponding organizations.
This standard may be tailored for the specific characteristics and constraints of a space project in conformance with ECSS-S-ST-00.

Raumfahrtproduktsicherung - Werkstoffe, Prozesse und Angaben zu ihrer Auswahl

Assurance produit des projets spatiaux - Matériaux, procédés et les données pour leur sélection

La présente norme spécifie les exigences applicables à la sélection des matériaux, des processus et des données associées pour satisfaire aux exigences de performance de la mission.
La présente norme couvre les points suivants :
•   les critères et règles de sélection ;
•   les critères et règles d'utilisation.
Les dispositions de la présente norme s'appliquent à tous les acteurs impliqués à tous les niveaux de la production de systèmes spatiaux. Ceux-ci peuvent inclure les engins spatiaux habités ou non habités, les lanceurs, les satellites, les charges utiles, les expériences, les équipements électriques et mécaniques de support au sol et les organisations correspondantes.
La présente norme peut être adaptée aux caractéristiques et contraintes spécifiques d'un projet spatial, conformément à l'ECSS-S-ST-00.

Zagotavljanje varnih proizvodov v vesoljski tehniki - Materiali, procesi in podatki za njihovo izbiro

Ta standard določa zahteve, ki se uporabljajo za materiale, postopke in izbiro podatkov o njih za izpolnjevanje zahtev glede ciljev misije.  Standard zajema naslednje: • merila in pravila za izbiro; • merila in pravila za uporabo. Določbe tega standarda se uporabljajo za vse izvajalce, vključene na vseh ravneh proizvodnje vesoljskih sistemov. Zajemajo lahko vesoljska plovila s posadko ali brez nje, lansirnike, satelite, tovore, poskuse, električno podporno opremo na tleh, mehansko podporno opremo na tleh in njihove ustrezne ureditve. Ta standard se lahko prilagodi posameznim lastnostim in omejitvam vesoljskega projekta v skladu s standardom ECSS-S-ST-00.

General Information

• Status: Published
• Publication Date: 23-Aug-2016
• Withdrawal Date: 27-Feb-2017
• ICS: 49.140 - Space systems and operations
• Technical Committee: CEN/CLC/TC 5 - Space
• Drafting Committee: CEN/CLC/TC 5/WG 6 - Upstream standards
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 24-Aug-2016
• Due Date: 30-Aug-2017
• Completion Date: 24-Aug-2016
• Mandate: M/496 - Mandate addressed to CEN, CENELEC and ETSI to develop standardisation regarding space industry (Phase 3 of the process)
• Ref Project: SIST EN 16602-70-71:2016 - Space product assurance - Materials, processs and their data selection

Overview

EN 16602-70-71:2016 - Space product assurance: Materials, processes and their data selection - is a CEN adoption of the ECSS guidance that defines requirements for selecting materials, processes and associated data to meet space mission performance. The standard prescribes selection criteria and utilization rules applicable across all actors and levels involved in producing space systems (manned/unmanned spacecraft, launchers, satellites, payloads, experiments, and ground support equipment). It can be tailored to project constraints in conformance with ECSS-S-ST-00.

Key Topics

The standard consolidates material- and process-related requirements relevant to space product assurance, including:

• Material categories and requirements
  • Metallics: aluminium (incl. tempers and restrictions), copper, nickel, titanium, steels and stainless steels, filler metals
  • Non‑metals: reinforced plastics, thermoplastics, thermosets, rubbers, adhesives, paints, coatings, optical materials, potting compounds, foams, ceramics
  • Wires, cables and PCB material aspects
  • Corrosion resistance, residual stress consideration and long‑term manned-structure restrictions
• Process requirements and controls
  • Adhesive bonding, composite manufacture, encapsulation/moulding, painting/coating
  • Cleaning, welding, brazing, soldering, crimping, wire wrapping
  • Surface treatments, plating, machining, forming, heat treatment and marking
  • Inspection procedures and process verification
• Data and databases
  • Guidance on using material/process data and reference to the European Space Materials Database (ESMDB, Annex A)
• Terminology and tailoring
  • Definitions, nomenclature for normative words (shall/should/may) and tailoring guidance per ECSS system

Applications

This standard is practical for:

• Materials engineers and designers selecting alloys, coatings and polymers for space flight hardware
• Manufacturing and quality teams implementing process controls for welding, soldering, bonding and cleaning
• Procurement and suppliers when qualifying materials and processes for space use
• Program managers and systems engineers ensuring mission-driven selection rules and conformity with space product assurance requirements

Typical uses include selecting low‑corrosion alloys for long-duration missions, defining acceptable coatings and outgassing performance, qualifying soldering/crimping processes, and establishing inspection and verification plans.

Related Standards

EN 16602-70-71:2016 references and sits alongside other ECSS/EN documents, for example:

• ECSS-Q-ST-70-02 (thermal vacuum outgassing tests)
• ECSS-Q-ST-70-04 (thermal testing)
• ECSS-Q-ST-70 series on soldering, PCBs, crimping and welding
• ECSS-S-ST-00 (system tailoring and glossary)

For organizations involved in space hardware development, EN 16602-70-71:2016 is a key, project‑level reference for robust materials and process selection consistent with space product assurance best practice.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Zagotavljanje varnih proizvodov v vesoljski tehniki - Materiali, procesi in podatki za njihovo izbiroRaumfahrtproduktsicherung - Werkstoffe, Prozesse und Angaben zu ihrer AuswahlAssurance produit des projets spatiaux - Matériaux, procédés et les données pour leur sélectionSpace product assurance - Materials, processs and their data selection49.140Vesoljski sistemi in operacijeSpace systems and operationsICS:Ta slovenski standard je istoveten z:EN 16602-70-71:2016SIST EN 16602-70-71:2016en,fr,de01-november-2016SIST EN 16602-70-71:2016SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16602-70-71
August
t r s x ICS
v {ä s v r
English version
Space product assurance æ Materialsá processes and their data selection
Assurance produit des projets spatiaux æ Matériauxá procédés et les données pour leur sélection
Raumfahrtproduktsicherung æ Werkstoffeá Prozesse und Angaben zu ihrer Auswahl This European Standard was approved by CEN on
t t May
t r s xä
C Internal Regulations 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 and CENELEC memberä
translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels y any means reserved worldwide for CEN national Members and for CENELEC Membersä Refä Noä EN
s x x r tæ y ræ y sã t r s x ESIST EN 16602-70-71:2016

This Standard covers the following: • selection criteria and rules; • utilization criteria and rules. The provisions of this Standard apply to all actors involved at all levels in the production of space systems. These can include manned and unmanned spacecraft, launchers, satellites, payloads, experiments, electrical ground support equipment, mechanical ground support equipment, and their corresponding organizations. This standard may be tailored for the specific characteristics and constraints of a space project in conformance with ECSS-S-ST-00. SIST EN 16602-70-71:2016

EN reference Reference in text Title EN 16601-00-01 ECSS-S-ST-00-01
ECSS system - Glossary of terms EN 16603-20-06 ECSS-E-ST-20-06 Space engineering - Spacecraft charging EN 16603-32-08 ECSS-E-ST-32-08 Space engineering - Materials EN 16602-20 ECSS-Q-ST-20 Space product assurance - Quality assurance EN 16602-70 ECSS-Q-ST-70 Space product assurance - Materials, mechanical parts and processes EN 16602-70-02 ECSS-Q-ST-70-02 Space product assurance - Thermal vacuum outgassing test for the screening of space materials EN 16602-70-04 ECSS-Q-ST-70-04
Space product assurance - Thermal testing for the evaluation of space materials, processes, mechanical parts and assemblies EN 16602-70-07 ECSS-Q-ST-70-07 Space product assurance - Verification and approval of automatic machine wave soldering EN 16602-70-08 ECSS-Q-ST-70-08 Space product assurance - Manual soldering of high-reliability electrical connections EN 16602-70-10 ECSS-Q-ST-70-10 Space product assurance - Qualification of printed circuit boards EN 16602-70-11 ECSS-Q-ST-70-11 Space product assurance - Procurement of printed circuit boards EN 16602-70-12 ECSS-Q-ST-70-12 Space product assurance - Design rules for printed circuit boards EN 16602-70-18 ECSS-Q-ST-70-18 Space product assurance - Preparation, assembly and mounting of RF coaxial cables EN 16602-70-26 ECSS-Q-ST-70-26 Space product assurance - Crimping of high-reliability electrical connections SIST EN 16602-70-71:2016

ESCC 3901 Generic specification - Wires and cables, electrical, 600V, low frequency
ESCC 3902 Generic specification - Cables, coaxial, radio frequency, flexible
ESCC 3903 Generic specification - Solid wires, electrical 350 V, for wire wrapping SIST EN 16602-70-71:2016

4. lot 5. material 6. part 7. process 8. relifing 9. repair b. For the purpose of this Standard, the terms and definitions from ECSS-E-ST-32 apply, in particular for the following terms: 1. A-basis design allowable (A-value) 2. B-basis design allowable (B-value) 3.2 Terms specific to the present standard 3.2.1. plate form of material having a thickness of >6 mm 3.2.2. sheet form of material having a thickness >0,2 mm and <6 mm 3.2.3. foil form of material having a thickness <0,2 mm SIST EN 16602-70-71:2016

liquid oxygen
MMPDS metallic materials properties development and standardization MPCB materials and processes control board NDI non-destructive inspection
PTFE polytetrafluroethylene SCC stress-corrosion cracking UTS
ultimate tensile strength 3.4 Nomenclature The following nomenclature applies throughout this document: a. The word “shall” is used in this Standard to express requirements. All the requirements are expressed with the word “shall”. b. The word “should” is used in this Standard to express recommendations. All the recommendations are expressed with the word “should”. NOTE It is expected that, during tailoring, recommendations in this document are either converted into requirements or tailored out. c. The words “may” and “need not” are used in this Standard to express positive and negative permissions, respectively. All the positive permissions are expressed with the word “may”. All the negative permissions are expressed with the words “need not”. d. The word “can” is used in this Standard to express capabilities or possibilities, and therefore, if not accompanied by one of the previous words, it implies descriptive text. NOTE In ECSS “may” and “can” have completely different meanings: “may” is normative (permission), and “can” is descriptive. e. The present and past tenses are used in this Standard to express statements of fact, and therefore they imply descriptive text. SIST EN 16602-70-71:2016

1 The uptake of hydrogen during processes (with possible generation of hydrides) can occur for example on processes such as welding, cleaning and heat treatment. NOTE
2 The uptake of oxygen during processes (with possible generation of alpha cases) can occur for example during heat treatment, welding and Electro Discharge Machining. b. Titanium alloys whose hardenability is limited by section size shall not be used in dimensions which exceed their limits. c. Structural applications using titanium shall be designed to avoid fretting. d. For manned structures, titanium shall not be used with LOX or GOX at a pressure exceeding 34,5 kPa. e. For manned structures, titanium shall not be used with air where the oxygen partial pressure exceeds 34,5 kPa. f. The use of cleaning fluids and other chemicals that are detrimental to the performance of titanium or titanium alloy parts shall not come in contact with these metals. SIST EN 16602-70-71:2016

1. controlled processing procedures are used, and 2. processing and procurement records are maintained for the reference. 4.2.7 Stainless steels a. Unstabilized austenitic steels shall not be used at temperatures above 370 °C. b. When using 400-series stainless steels the risk for hydrogen embrittlement, corrosion and stress corrosion cracking shall be controlled. c. Control means shall be presented for customer approval. 4.2.8 Filler metals: welding, brazing, soldering a. The selection of alloys to be welded and the selection of process techniques shall be in conformance with national or international aerospace specifications and standards approved by the customer. b. The fusion zone and the unmelted heat affected zone of a weld shall be accessible for inspection. c. All welds used for structural applications shall undergo 100 % radiographic inspection in conformance with specifications approved by the customer. d. All welds used for structural applications shall undergo a NDI program that shall be submitted for customer approval. NOTE ECSS-E-ST-32-01 contains additional requirements specific to welds used for Potential Fracture Critical Items applications. e. The capability of the equipment to meet the specified requirements, processes, welding supplies and supplementary treatments selected by the supplier shall be demonstrated through qualification testing of welded specimens representing the materials and joint configuration of production parts. f. The selection of brazing alloys and brazing techniques shall be in conformance with national or international aerospace specifications and standards approved by the customer. SIST EN 16602-70-71:2016

l. The supplier shall demonstrate that solvents contained in coatings and varnishes have been removed prior to curing. NOTE Thinner is example of solvent. m. Adhesives, coatings and varnishes that are sensitive to moisture contamination shall only be used in controlled-humidity environments. n. Where void free application is used on coatings and varnishes the supplier shall apply a debubbling process, defined in a dedicated procedure. 4.2.12 Adhesive tapes a. Tapes containing polyvinylchloride shall not be used in space segment elements or ground segment equipment undergoing vacuum. b. All release agents present on the surface of tapes shall be removed. c. The adherent surface or surfaces on which the tape is applied shall be clean and dry prior to its application. d. When an adhesive tape is applied to painted surfaces, the supplier shall verify that the paint is not degraded when the adhesive tape is removed. e. An even pressure shall be used on the tape during its application. f. It shall be ensured that the tape is not damaged during its application. g. Perforated tapes should be used to enable the correct evacuation of trapped air bubbles underneath the adhesive tape. h. When perforated tapes are not used, the process of tape application and removal of bubbles shall be documented. i. The exposure to the space environment shall not impair the function of the tape. j. Surfaces that have had tapes removed for reworking or for temporary reasons shall be cleaned after the tape is removed.
NOTE Adhesives, in particular silicone ones, can leave a residue which prevents adhesion of other systems onto that surface. k. Removed tapes shall not be reused. SIST EN 16602-70-71:2016

f. The long-term performance of lubricants shall be assessed during their selection for long-term deployed systems. g. Lubricants containing chloro-fluoro compositions shall not be used with aluminium or magnesium if shear stresses are imposed. SIST EN 16602-70-71:2016

1. “set” under stress,
2. effects of cyclic stress,
3. environmental resistance, and 4. chemical resistance. b. Polysulphide materials shall not be used in the space environment. c. Chlorinated materials shall not be used in space environments. d. Silicone materials shall not be used in pressurized systems requiring low gas permeability. e. Rubbers and elastomers containing plasticisers or extending oils shall not be used under vacuum. f. The leaching of filler materials shall be assessed with respect to their potential hazard to associated equipment. g. Material depolymerization due to vacuum exposure shall be assessed. h. Rubbers or elastomers releasing corrosive media shall be assessed for its potential risk. i. Materials that liberate acetic acid shall be assessed before use. j. Rubbers and elastomers used in long-term, manned structures shall be assessed for their long-term resistance to the following: 1. ageing,
2. low temperature,
3. ozone,
4. heat-ageing,
5. polymer reversion,
6. working fluids,
7. lubricants and operating media and, 8. any application- or mission-specific requirements. SIST EN 16602-70-71:2016

4.2.18 Thermoplastics
a. Structural designs using thermoplastic composite materials shall conform to the requirements of clause 4 of ECSS-E-ST-32-08. b. For polymer-based materials, a definition of all the design constraints shall be established. NOTE 1 Examples of polymer-based materials are thermosetting and thermoplastic. NOTE 2 Examples of design constraints are: short-term loading, long-term loading, cyclic loading, impact loading, design life and critical dimensional tolerances. c. Thermoplastics shall be evaluated for the effects of service conditions. d. A structural design analysis shall be performed on all parts incorporating polymer-based materials, including the visco-elastic nature of the chosen material. e. For polymer-based materials prototypes shall be produced and tested to qualify the design. NOTE Examples of polymer-based materials are thermosetting and thermoplastic. f. For polymer-based materials, environmental exposure shall be assessed. NOTE Examples of environmental exposure are: flammability requirements, electrical requirements, normal use temperature, abnormal use temperature excursions, chemical exposure and humidity levels. g. The supplier shall demonstrate that the anisotropic characteristics of plastic films are assessed during design. h. The supplier shall demonstrate how the processing methods of thermoplastics accounts for their softening temperature. i. PTFE shall not be used in creep resistance applications. j. Thermoplastics that retain residual stresses after processing shall be subject to an approved thermal stress-relief process. SIST EN 16602-70-71:2016

• machining the honeycomb panel, normally using specific tools
• potting the insert
• curing the potting material.
NOTE 3 For guidelines on the use of inserts see ECSS-E-HB-32-22. 4.3.2 Composite manufacture a. Process conditions and environments shall be specified and controlled during all stages of composite manufacture.
NOTE 1 Manufacturing stages include for example: storage or de-storage and handling of raw materials, preparation, application, curing, machining, inspection or testing and storage of finished parts.
NOTE 2 See ECSS-E-HB-32-20 for information on composite manufacture. b. Tooling materials shall be selected to ensure thermal-expansion matching between the composite over the processing temperatures. NOTE The rigidity of the tooling is also an important parameter.
4.3.3 Encapsulation and moulding and varnishing a. Process conditions and environments shall be specified and controlled during all stages of encapsulation, moulding and varnishing. NOTE Stages of encapsulation moulding and varnishing include for example preparation, application, curing or drying, inspection or testing and storage. b. In electronic assemblies, when potting is used for encapsulation it shall allow rework or repair. c. In electronic assemblies conforma
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