EN 4632-005:2009

Aerospace series - Weldability and brazeability of materials in aerospace constructions - Part 005: Homogeneous assemblies of heat resisting Ni or Co base alloys

This European Standard defines degrees of weldability and brazeability for materials or families of materials used in the aerospace industry.
It comprises a series of sheets, by materials or by material family, which:
-   indicate the main titles, the chemical composition and the main characteristics;
-   contain recommendations for welding and brazing;
-   indicate a degree of weldability or brazeability for a given process under defined conditions;
-   indicate a value of the mechanical strength coefficient of the welded joint for each welding process, when it could be extracted from bibliographic references referring to it. The joint coefficient is expressed as a ratio of the tensile strength of the welded joint to the tensile strength of the base alloy (to be in accordance with EN 4632-002).
It is applicable without restriction for the manufacturing of new parts or for repair.

Luft- und Raumfahrt - Schweißbarkeit und Lötbarkeit von Werkstoffen im Luft- und Raumfahrzeugbau - Teil 005: Schweißen und Löten gleichartiger Verbindungen aus hitzebeständigen Nickel- oder Kobaltbasislegierungen

Diese Europäische Norm legt den Schweißbarkeits- und Lötbarkeitsgrad für in der Luft- und Raumfahrtindustrie
verwendete Werkstoffe oder Werkstofffamilien fest.
Sie enthält eine Serie von Datenblättern, eingeteilt nach Werkstoffen und Werkstofffamilien, die:
⎯ die Haupttitel, die typische chemische Zusammensetzung und die Haupteigenschaften angeben;
⎯ Empfehlungen zum Schweißen und Hartlöten enthalten;
⎯ den Schweißbarkeits- oder Lötbarkeitsgrad für einen bestimmten Prozess unter festgelegten
Bedingungen angeben;
⎯ einen Wert für den Faktor der mechanischen Festigkeit der Schweißnaht für jeden Schweißprozess
angeben, wenn er Literaturhinweisen entnommen werden kann, die Bezug auf diesen nehmen. Der
Verbindungskoeffizient wird als Verhältnis der Zugfestigkeit der Schweißnaht zur Zugfestigkeit der Basislegierung
angegeben (in Übereinstimmung mit EN 4632-002).
Sie gilt ohne Einschränkung für die Fertigung von neuen Teilen oder für die Instandsetzung.
2

Série aérospatiale - Assemblages soudés et brasés pour constructions aérospatiales - Soudabilité et brasabilité des matériaux - Partie 005: assemblage homogènes des alliages base Ni ou Co résistant à haute température

Aeronavtika - Varivost in spajkljivost materialov v aeronavtičnih konstrukcijah - 005. del: Varjenje in spajkanje homogenih sestavov iz nikljeve ali kobaltove osnovne zlitine, odporne proti vročini

Ta evropski standard opredeljuje stopnje varivosti in spajkljivosti materialov ali skupin materialov, ki se uporabljajo v aeronavtični industriji. Sestavlja ga niz listov, po materialih ali skupini materiala, ki: - navajojo glavne naslove, kemično sestavo in glavne značilnosti; - vsebujejo priporočila za varjenje in spajkanje; - navajajo stopnjo varivosti ali spajkljivosti za določen postopek pod opredeljenimi pogoji; - navajajo vrednost koeficienta mehanske trdnosti varjenega spoja za vsak postopek varjenja, kadar ga je mogoče povzeti iz bibliografskih sklicev, ki se nanašajo nanj. Koeficient spoja je izražen kot razmerje med natezno trdnostjo varjenega spoja in natezno trdnostjo osnovne zlitine (mora biti v skladu z EN 4632-002). Velja brez omejitev za proizvodnjo novih delov ali za popravila.

General Information

• Status: Published
• Publication Date: 01-Dec-2009
• Withdrawal Date: 29-Jun-2010
• ICS: 49.025.01 - Materials for aerospace construction in general
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4 - Metallic
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 02-Dec-2009
• Completion Date: 02-Dec-2009
• Ref Project: SIST EN 4632-005:2010 - Aerospace series - Weldability and brazeability of materials in aerospace constructions - Part 005: Homogeneous assemblies of heat resisting Ni or Co base alloys

Overview

EN 4632-005:2009 - part of the CEN Aerospace series - specifies how to assess and document the weldability and brazeability of homogeneous assemblies made from heat‑resisting nickel (Ni) or cobalt (Co) base alloys used in aerospace constructions. The standard organizes material‑specific “sheets” that record chemical composition, main characteristics, recommended welding and brazing practices, and a declared degree of weldability/brazeability for defined processes. Where bibliographic data exist, the sheets also give a mechanical strength coefficient for welded joints (ratio of welded‑joint tensile strength to base‑alloy tensile strength, per EN 4632-002). EN 4632-005 is applicable for both manufacture of new parts and repair.

Key topics

• Material sheets: Each sheet lists alloy designation, chemical composition ranges, structure and principal mechanical/temperature characteristics (e.g., continuous use temperatures, forms such as castings, forgings, sheet).
• Welding recommendations: Process‑specific guidance (electron beam, laser, gas tungsten arc, resistance, friction, plasma, etc.), pre‑/post‑weld heat treatment (PWHT), filler metal suggestions and joint efficiency considerations.
• Brazing guidance: Vacuum and local brazing recommendations, assembly temperatures, post‑joining heat treatment (PJHT), filler family/form and flux use.
• Degrees and coefficients: A declared degree of weldability or brazeability for each process under defined conditions; where available, a joint mechanical strength coefficient expressed as a tensile‑strength ratio, in accordance with EN 4632-002.
• Normative references and terminology: Cross‑references to EN 4632‑001 (general requirements), EN ISO 4063 (welding process codes), and multiple EN alloy specifications and welding/brazing consumable standards.

Applications

• Selection and qualification of welding and brazing methods for heat‑resisting Ni and Co alloys used in hot‑section aerospace components (turbine parts, casings, precision castings, high‑temperature structural elements).
• Preparation of process specifications, repair procedures and fabrication instructions that require documented weldability/brazeability ratings.
• Estimation of welded joint performance using the joint strength coefficient for design validation and repair acceptability.
• Support for procurement and materials traceability by linking alloy designations and recommended consumables.

Who uses this standard

• Welding and materials engineers, design and structural engineers in aerospace OEMs and MRO organizations
• Quality managers, process qualification teams, and certification bodies
• Suppliers of nickel and cobalt heat‑resisting alloys, and manufacturers of turbine components and high‑temperature assemblies

Related standards

• EN 4632-001 (general requirements)
• EN 4632-002 (joint coefficient definition)
• EN ISO 4063 (welding process nomenclature)
• Numerous EN alloy standards and filler‑metal specifications referenced within EN 4632-005

Keywords: EN 4632-005:2009, weldability, brazeability, nickel alloys, cobalt alloys, aerospace, heat‑resisting, welding processes, brazing, joint efficiency, repair.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Luft- und Raumfahrt - Schweißbarkeit und Lötbarkeit von Werkstoffen im Luft und Raumfahrzeugbau - Teil 005: Schweißen und Löten gleichartiger Verbindungen aus hitzebeständigen Nickel- oder KobaltbasislegierungenSérie aérospatiale - Soudabilité et brasabilité des matériaux pour constructions aérospatiales - Partie 005: Assemblages homogènes des alliages base Ni ou Co résistant à haute températureAerospace series - Weldability and brazeability of materials in aerospace constructions - Part 005: Homogeneous assemblies of heat resisting Ni or Co base alloys49.025.15Neželezove zlitine na splošnoNon-ferrous alloys in general25.160.01Varjenje, trdo in mehko spajkanje na splošnoWelding, brazing and soldering in generalICS:Ta slovenski standard je istoveten z:EN 4632-005:2009SIST EN 4632-005:2010en01-februar-2010SIST EN 4632-005:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4632-005
December 2009 ICS 49.025.01 English Version
Aerospace series - Weldability and brazeability of materials in aerospace constructions - Part 005: Homogeneous assemblies of heat resisting Ni or Co base alloys
Série aérospatiale - Assemblages soudés et brasés pour constructions aérospatiales - Soudabilité et brasabilité des matériaux - Partie 005: assemblage homogènes des alliages base Ni ou Co résistant à haute température
Luft- und Raumfahrt - Schweißbarkeit und Lötbarkeit von Werkstoffen im Luft und Raumfahrzeugbau- - Teil 005: Schweißen und Löten gleichartiger Verbindungen aus hitzebeständigen Nickel- oder Kobaltbasislegierungen This European Standard was approved by CEN on 12 September 2009.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4632-005:2009: ESIST EN 4632-005:2010

EN 2183, Aerospace series — Heat resisting alloy NI-PH2301 (NiCr21Fe18Mo9) — Solution treated — Forging — De ≤ 200 mm 1)
EN 2184, Aerospace series — Heat resisting alloy NI-PH2301 (NiCr21Fe18Mo9) — Solution treated — Bar and section — De ≤ 200 mm 1) EN 2185, Aerospace series — Heat resisting alloy NI-PH2301 (NiCr21Fe18Mo9) — Solution treated — Sheet, strip and plate — 0,2 mm ≤ a ≤ 10 mm 1) EN 2199, Aerospace series — Heat resisting alloy NI-PH1303 (NiCo20Cr20Mo5Ti2Al) — Solution treated and precipitation treated — Bar and section — De ≤ 200 mm 1) EN 2203, Aerospace series — Heat resisting alloy NI-PH1303 (NiCo20Cr20Mo5Ti2Al) — Solution treated — Sheet, strip and plate — 0,2 mm ≤ a ≤ 10 mm 1) EN 2204, Aerospace series — Heat resisting alloy NI-CH1303 (NiCo20Cr20Mo5Ti2Al) — Vacuum melted — Solution treated and precipitation treated — Precision casting — De ≤ 50 mm 1) EN 2403, Aerospace series — Heat resisting alloy NI-CH2601 (NiCr19Fe19Nb5Mo3) — Vacuum melted — Solution treated and precipitation treated — Precision casting — a or D ≤ 50 mm 1) EN 2405, Aerospace series — Heat resisting alloy NI-PH2601 (NiCr19Fe19Nb5Mo3) — Solution treated and precipitation treated — Forgings — De ≤ 200 mm 1)
1) Published as ASD-STAN Prestandard at the date of publication of this standard. SIST EN 4632-005:2010

EN 2657, Aerospace series — Heat resisting alloy CO-PH1402 — Consumable electrode remelted — Solution treated — Bar — a or D ≤ 150 mm — Rm ≥ 860 MPa 2) EN 2658, Aerospace series — Heat resisting alloy CO-PH1402 — Consumable electrode remelted — As forged — Forging stock — De ≤ 360 mm 2) EN 2659, Aerospace series — Heat resisting alloy CO-PH1402 — Consumable electrode remelted — Solution treated — Forgings — De ≤ 100 mm — Rm ≥ 860 MPa 2) EN 2661, Aerospace series — Heat resisting alloy CO-PH1402 — Consumable electrode remelted — Solution treated — Sheet and strip — a ≤ 3 mm — Rm ≥ 860 MPa 2) EN 2662, Aerospace series — Heat resisting alloy NI-PH3601 (NiCr22Mo9Nb) — Annealed — Sheet, strip and plate — 0,2 mm ≤ a ≤ 10 mm 2) EN 2663, Aerospace series — Heat resisting alloy NI-PH3601 (NiCr22Mo9Nb) — Solution treated — Sheet, strip and plate — 0,2 mm ≤ a ≤ 10 mm 2) EN 2959, Aerospace series — Heat resisting alloy NI-PH1302 (NiCr20Co13Mo4Ti3Al) — Solution treated and cold worked — Bar for forged fasteners — 3 mm ≤ D ≤ 30 mm 2) EN 3668, Aerospace series — Heat resisting alloy NI-PH2301 (NiCr21Fe18Mo9) — Non heat treated — Forging stock — a or D ≤ 250 mm EN 3671, Aerospace series — Heat resisting alloy NI-PH3601 (NiCr22Mo9Nb) — Non heat treated — Forging stock — a or D ≤ 250 mm
EN 3884, Aerospace series — Heat resisting alloy NI-WH2601 (NiCr19Nb5Mo3Ti) — Filler metal for welding EN 3887, Aerospace series — Heat resisting alloy CO-WH4101 (CoCr20W15Ni) — Filler metal for welding EN 3888, Aerospace series — Heat resisting alloy CO-WH1402 (CoCr22Ni22W15) — Filler metal for welding EN 4095, Aerospace series — Heat resisting alloy NI-CH1305 (NiCr16Co10Mo8Al4Ti4) — Vacuum melted — Non heat treated — Precision castings 2) EN 4222, Aerospace series — Heat resisting alloy NI-PH1305 (NiCr22Co13Mo9Al1) — Air melted and vacuum refined — Annealed — Sheet and strip — 0,25 mm ≤ a ≤ 3 mm 2) EN 4327, Aerospace series — Heat resisting alloy CO-WH1401 (CoCr26Ni11W8) — Filler metal for welding — Wire and rod EN 4329, Aerospace series — Heat resisting alloy NI-WH0001 (NiCr20) — Filler metal for welding — Wire and rod EN 4376, Aerospace series — Heat resisting alloy NI-PH2601 (NiCr19Fe19Nb5Mo3) — Solution treated and precipitation treated — Bar and section — De ≤ 200 mm 2) EN 4377, Aerospace series — Heat resisting alloy NI-PH2601 (NiCr19Fe19Nb5Mo3) — Non heat treated — Forging stock — a or D ≤ 300 mm 2)
2) Published as ASD-STAN Prestandard at the date of publication of this standard. SIST EN 4632-005:2010

EN 4381, Aerospace series — Heat resisting alloy NI-PH3601 (NiCr22Mo9Nb) — Solution treated — Seamless tubes — For structural application — D ≤ 50 mm, a ≤ 3 mm 3) EN 4382, Aerospace series — Heat resisting alloy NI-PH3601 (NiCr22Mo9Nb) — Solution treated — Seamless tubes — For hydraulic application — D ≤ 50 mm, a ≤ 3 mm EN 4384, Aerospace series — Heat resisting alloy NI-CH1303 (NiCo20Cr20Mo5Ti2Al) — Non heat treated — Remelting stock EN 4566, Aerospace series — Heat resisting alloy CO-PH4101 (CoCr20W15Ni) — Vacuum melted — Solution treated — Forgings — De ≤ 100 mm 3) EN 4567, Aerospace series — Heat resisting alloy CO-PH4101 (CoCr20W15Ni) — Vacuum melted — Solution treated — Bar and section — a or D ≤ 100 mm 3) EN 4568, Aerospace series — Heat resisting alloy CO-PH4101 (CoCr20W15Ni) — Vacuum melted — Solution treated — Sheet and strip — a ≤ 6 mm 3) EN 4569, Aerospace series — Heat resisting alloy CO-PH4101 (CoCr20W15Ni) — Vacuum melted — Solution treated — Wire — D ≤ 4 mm 3) EN 4632-001:2008, Aerospace series — Welded and brazed assemblies for aerospace constructions — Weldability and brazeability of materials — Part 001: General requirements EN 4632-002, Aerospace series — Welded and brazed assemblies for aerospace constructions — Weldability and brazeability of materials — Part 002: Homogeneous asssemblies aluminium and aluminium alloys EN 10095, Heat resisting steels and nickel alloys EN ISO 4063:2009, Welding and allied processes — Nomenclature of processes and reference numbers (ISO 4063:2009)
EN ISO 18274, Welding consumables — Wire and strips electrodes, wires and rods for fusion welding of nickel and nickel alloys — Classification (ISO 18274:2004) ISO 9722, Nickel and nickel alloys — Composition and forms of wrought products AMS 5390, Nickel alloy, corrosion and heat resistant, investment castings 47.5Ni - 22Cr - 1.5Co - 9Mo - 0.60W - 18.5Fe (N-12mv) as cast 4)
AMS 5399, Nickel alloy, corrosion and heat resistant, investment castings 52Ni - 19Cr - 11Co - 9.8Mo - 3.2Ti - 1.6Al - 0.006B vacuum-melted, vacuum-cast, solution heat treated 4) AMS 5402, Nickel alloy, corrosion and heat-resistant, investment castings 62Ni - 21.5Cr - 9.0Mo - 3.6Cb (Nb) as cast 4)
3) Published as ASD-STAN Prestandard at the date of publication of this standard. 4) Published by: SAE, 400 Commonwealth Drive - Warrendale, PA 15096-0001 USA. SIST EN 4632-005:2010

AMS 5580, Nickel alloy, corrosion and heat resistant, seamless tubing 74Ni - 15.5Cr - 8.0Fe annealed 5) AMS 5665, Nickel alloy, corrosion and heat resistant, bars, forgings, and rings 74Ni - 15.5Cr - 8.0Fe 5) AMS 5687, Nickel alloy, corrosion and heat resistant, wire 74Ni - 15.5Cr - 8.0Fe annealed 5) AWS A5.14, Specification for Nickel and Nickel Alloy Bare Welding Electrodes and Rods 6)
AWS A5.8-92, Specification for filler metals for brazing and braze welding 6) 3 Terms, definitions, symbols and abbreviations For the purposes of this document, the terms and definitions given in EN 4632-001:2008 and EN ISO 4063:2009 apply. F : Foil p : Powder PJHT : Post joining heat treatment PWHT : Post-weld heat treatment w : Wire 15 : Plasma arc welding 21 : Resistance spot welding 22 : Resistance seam welding 24 : Flash welding 42 : Friction welding 51 : Electron beam welding 52 : Laser welding 91 : Brazing with local heating 111 : Shielded metal arc welding 141 : Gas tungsten arc welding 522 : Gas laser welding 521 : Solid state laser welding 922
: Vacuum brazing
5) Published by: SAE, 400 Commonwealth Drive - Warrendale, PA 15096-0001 USA. 6) Published by: AWS, 550 N.W. LeJeune Road, Miami, Florida 33126. SIST EN 4632-005:2010

EN 10095 : NiCr15Fe ASD STAN : – Other standards : AMS 5665, AMS 5540, AMS 5580, AMS 5687 and ISO 9722 7.1.2 Chemical composition (w.%) Table 2 Grade Ni Fe C Si Mn P S Cr Cu Al Ti NiCr15Fe base 6,0 to
10,0 0,05to 0,10 ≤ 0,5 ≤ 1,0 ≤ 0,02 ≤ 0,01514,0 to
17,0 ≤ 0,5 ≤ 0,30 ≤ 0,30 7.1.3 Structure Austenitic. 7.1.4 Particular characteristics Tensile strength for base metal: Rm = 550 MPa (minimum guaranteed in the annealed state). Continuous use up to 700 °C. 7.1.5 Forms Bars, forgings and rings (AMS 5665), Sheet, strip and plate (AMS 5540), Tube (AMS 5580) and Wire (AMS 5687). SIST EN 4632-005:2010

AWS acronym and corresponding EN ISO 4063 reference number Thickness range a
mm State before welding PWHT Degree
of weldability b Joint efficiencyComments and bibliographic references [ ] 141 All Hardened None or Stress relieving 1 c
Filler metal: ERNiCrFe-5 according to AWS A5.14 NiCr16Fe8Nb according to EN ISO 18274 ERNiCr-3 according to AWS A5.14 NiCr20Mn3Nb according to EN ISO 18274 ERNiCr-6 according to AWS A5.14 NiCr20 according to EN ISO 18274 NiCr20 according to EN 4329 [1] EBW 51
– Hardened None or Stress relieving 1 1 – 521 ≤ 1 Hardened None 1 – – RSEW 22 – Hardened – 1 – – RSW 21 – Hardened – 1 – – FW 24 All Hardened Hardened 1 1 – a The range of thicknesses in the table concerns single run welding. b If two degrees are indicated, the responsible person shall select the degree that is most appropriate for the definition of the assembly. c Tensile strength for melted metal and Rm = 663 MPa (average value) for ERNiCr-3 filler metal.
Table 4 — Recommendations for brazing and diffusion brazing assemblies AWS acronym and corresponding EN ISO 4063 reference number State before assembly Assembly temperature °C PJHT Filler metal Flux Degree of brazeability or weldability Comments family form 922 (vacuum furnace) Hardened 1 050 None Ni p None 1 – SIST EN 4632-005:2010

7.2.3 Structure Austenitic with structural hardening γ′ (primary). 7.2.4 Particular characteristics Cast superalloy, stress released. Precision castings with good creep resistance at high temperatures. Use up to 1 050 °C. 7.2.5 Forms Castings (EN 4095). Table 6 — Recommendations for welding and filling with NiCr16Co10Mo8Al4Ti4 AWS acronym and corresponding EN ISO 4063 reference number Thickness range a
mm State before welding PWHT Degree
of weldability Joint efficiency Comments and bibliographic references [ ] 141 ≤ 3 Hardened Hardened b
3 – Filler metal: NiMo24FeCr: ERNiMo-3 according to AWS A5.14 NiMo25Cr5Fe5 according to EN ISO 18274 EBW 51 ≤ 3 Hardened Hardened 2 to 3 – – a The range of thicknesses in the table concerns single run welding. b After welding, maintained for 30 min at (1 060 ± 10) °C. Slow cooling to 1 000 °C then cooling at ambient air.
at ambient air. 7.3 NiCr19Fe19Nb5Mo3 (wrought) 7.3.1 Designation EN 2405, EN 2407, EN 4376, EN 4377 : NiCr19Fe19Nb5Mo3 ASD STAN : Ni-PH2601 Other standards : – 7.3.2 Chemical composition (w.%) Table 8 Grade Ni Fe C Si Mn P S Cr Co Mo Al Ti Nb + TaNiCr19Fe19Nb5Mo3 base 16,5to 20,5 0,02 to
0,08 ≤ 0,35 ≤ 0,35 ≤ 0,015≤ 0,01517,0to 21,0 ≤ 1,02,80 to 3,30 0,20 to
0,80 0,70 to
1,15 4,8 to
5,5
7.3.3 Structure Austenitic with structural hardening γ″ (secondary). Hot microcracks can be reduced by using a grain size grade greater than ASTM grade 6. 7.3.4 Particular characteristics Continuous use for structural parts up to 600 °C. 7.3.5 Forms Forgings (EN 2405), Sheet, strip and plate (EN 2407), Bar and section (EN 4376), Forging stock (EN 4377).
mm State before welding PWHT Degree
of weldability Joint efficiency b
Comments and bibliographic references [ ] 141 ≤ 3 Hardened Hardened and tempered Hardened1 to 2 0,93
[2] Filler metal: NiCr19Nb5Mo3Ti according to EN 3884 (Ni-WH2601) NiCr19Fe19Nb5Mo3 according to
EN ISO 18274 Hardened Hardenedand tempered c
2 to 3
PAW 15
≤ 5 Hardened and tempered Tempered 2 to 3 0,98
[3] FRW 42 ≤ 10 Hardened and tempered Hardened 1 to 2 1 [4] EBW 51 ≤ 8 Hardened Hardened and tempered c
2 to 3 1 [2] Hardened and tempered Tempered 3 to 4 LW 52 ≤ 3 Hardened None 2 to 3 0,95 [5] Hardened and tempered Tempered 3 to 4 1 [6] RSEW 22 ≤ 3 Hardened Hardenedand tempered 2 – – Hardened and tempered Tempered 3 RSW 21 ≤ 3 Hardened Hardenedand tempered 2 – – Hardened and tempered Tempered 3 FW 24 All Hardened Hardenedand tempered 1 – – Difficulties for EBW 51 and 141: Before welding: phase δ precipitation treated. PWHT: Hardened and Tempered or Tempered, the γ" precipitation restores the mechanical characteristics. a The range of thicknesses in the table concerns single run welding. b Values after remachining. c Required for weldings submitted to fatigue cracking.
– 7.4.2 Chemical composition (w.%) Table 11 Grade Ni Fe C Si Mn P S Cr Co Mo Al Ti Nb + Ta NiCr19Fe19Nb5Mo3 base 16,5
to
20,5 0,02
to
0,08 ≤ 0,35≤ 0,35≤ 0,015≤ 0,01517,0 to 21,0 ≤ 1,0 2,80
to
3,30 0,40
to
0,80 0,70 to 1,15 4,8 to 5,5
7.4.3 Structure Austenitic with structural hardening γ″ (secondary). Weldability is better especially with smaller grain size.
7.4.4 Particular characteristics Good castability. Poor weldability. High mechanical characteristics but lower than in wrought state. Continuous use up to 650 °C. To optimize the parameters in automatic welding, a Hot Isostatic Pressing (HIP) can be recommended. This operation can advantageously replace the Homogenizing (Ha). 7.4.5 Forms Precision casting (EN 2403). SIST EN 4632-005:2010

mm State before welding PWHT Degree
of weldability Joint efficiency
Comments and bibliographic references [ ] 141 – Homogenized annealed
or Homogenized annealed + Hardened
or Homogenized annealed + Hardened + Tempered Tempered Hardened + Tempered b
3 0,8
Filler metal: NiCr19Nb5Mo3Ti according to EN 3884 (NI-WH2601) NiCr19Fe19Nb5Mo3 according to EN ISO 18274 PAW 15 < 5 Homogenized annealed or Homogenized annealed + Hardened or Homogenized annealed + Hardened + Tempered Hardened + Tempered 3 0,8
...