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NiCr25FeAlY | 2.4633 Material Datasheet

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Material Description

Material Number Material Number (single) Standard Scope Standard Status Country Successor Application temperature [°C] VDA 231-106 classification
2.4633 (DIN 17742 : 2002-09) 2.4633 DIN 17742 : 2002-09 DIN 17742 : 2002-09 replaced by DIN 17742 : 2020-12 Replaced Germany NiCr25FeAlY -10 - 1150 3.4 1)
1) Remark: According to VdTÜV-Werkstoffblatt 540 : 2002-09, the material NiCr25FeAlY with the material number 2.4633 is used for pressure vessels according to TRB 100 and, with interpreting the AD-Merkblatt W 2 faithfully to its meaning, for temperatures from -10 to 1150 °C (>500 to 650 °C: limited). Furthermore, the nickel-base alloy with its high carbon content is applied for ranges of applications in nuclear engineering as far as the rules of nuclear engineering or the object-related specifications permit the use of -10 to 1150 °C (>500 to 650 °C: limited). In the as-delivered condition and in the identically welded condition, the material, as a result of its tightly adhering aluminium oxide layer and its increased Cr- and Al-content, possesses a high resistance to oxidation as well as a good durability in oxidizing atmospheres containing sulphur at elevated temperatures. With observance of the generally acknowledged rules of technology and with application limitations according to manufacturer guidelines, the suitability of welding of this material is approved for metal-arc welding, metal-gas-shielded/active-gas welding or tungsten-plasma welding (welding fillers: sheathed stick electrode EL-NiCr25FeAl, welding rod or wire electrode SG-NiCr25FeAl). A preheating is prohibited, the intermediate layer temperature must not exceed 120 °C. As a rule, a heat treatment after the welding is not necessary. The material can be plasma-cut. About reductions in the toughness behaviour at application temperatures of > 500 to 650 °C, see VdTÜV-Wbl 540 : 2002-09, sections 16 and 17. The following is valid for the material according to DIN 17742 : 2002-09: the material NiCr25FeAlY is applied for furnace construction components in the form of strips, sheets, tubes and bars. It is a nickel-chromium-iron alloy with a high carbon content and with aluminium and yttrium additives, and it is marked by extraordinary resistance to corrosion at high temperatures in cyclic conditions, too, by a very good resistance to oxidation in carbonizing mediums, an excellent high-temperature strength as well as hardenablity up to 800 °C. Application fields are to be found in heat-engineering and chemical processes as well as in plants in power stations, so among other things for steel tubes, furnace rolls, muffles in bright-annealing furnaces (hydrogen atmosphere), furnace parts, tube hangers, components in exhaust gas systems and exhaust gas decontamination plants as well as pig-tails in ethylene plants. Processing properties: Formability: good Weldability: good (Werkstoffblatt/Wbl: material specification Merkblatt: specification sheet)

Chemical Composition

Al [%] C [%] Cr [%] Cu [%] Fe [%] Mn [%] P [%] S [%] Si [%] Ti [%] Y [%] Zr [%]
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Mechanical Properties

Semi-finished Product Condition Strength Abbrevation Nominal Size [mm] Temperature [°C] Tensile Strength [MPa] Yield Strength (0.2% offset) [MPa] Yield Strength (1.0% offset) [MPa] Elongation A [%] Hardness HB | HBW
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Physical Properties

Temperature [°C] Melting Temperature [°C] Density [g/cm³] Young's Modulus [GPa] Mean Coefficient of Thermal Expansion (reference 20°C) [10^-6*K^-1] Thermal Conductivity [W/(m*K)] Specific Electrical Resistance [µΩm] Mean Specific Heat Capacity [kJ/(kg*K)]
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Welding and Joining

Procedure Welding and Joining - Evaluation Interpass Temperature [°C] Added Materials Information
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Creep Rupture Behaviour

Condition Temperature [°C] Creep Tensile Strength at 10^4 h [MPa] 1% Creep Limit at 10^4 h [MPa]
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Heat Treatment

Heat Treatment Step Temperature [°C] Medium
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Cross Reference

Material Name Country Standard
N06025 USA UNS
ERNiCrFe-12 USA ASME SFA5.14
B163 UNS N06025 USA ASTM B163
B166 UNS N06025 USA ASTM B166
B167 UNS N06025 USA ASTM B167
B168 UNS N06025 USA ASTM B168
B366 UNS N06025 USA ASTM B366
B462 UNS N06025 USA ASTM B462
B516 UNS N06025 USA ASTM B516
B517 UNS N06025 USA ASTM B517
B546 UNS N06025 USA ASTM B546
B564 UNS N06025 USA ASTM B564
B924 UNS N06025 USA ASTM B924
ERNiCrFe-12 USA AWS A5.14
NiCr25FeAlY Germany DIN 17750
NiCr25FeAlY Germany DIN 17751
NiCr25FeAlY Germany DIN 17752
NiCr25FeAlY Germany DIN 17753

Producer/Supplier/Trade names

Tradename Supplier
2.4633 Schoellerwerk GmbH & Co. KG, Hellenthal/Eifel
2.4633 INTERSTAHL Service GmbH, Wetter
Alloy 602 Enpar Sonderwerkstoffe GmbH, Gummersbach
Alloy 602 CA F.W. Hempel & Co. Gesellschaft für Spezial-Rostfrei-Metalle mbH, Oberhausen
Alloy 602 CA entspr. Chr. Höver & Sohn GmbH & Co KG, Lindlar
Coralloy 602 Ca Chr. Höver & Sohn GmbH & Co. KG, Lindlar
DMV 602 CA Salzgitter Mannesmann Stainless Tubes GmbH, Mülheim an der Ruhr
Haynes alloy 230 ZAPP AG, Ratingen
NiCr25FeAlY Hoesch Hohenlimburg GmbH, Hagen
NiCr25FeAlY pauly STAHLHANDEL, Essen
Nicrofer 6025 HT-alloy 602 CA VDM Metals GmbH, Werdohl
Nicrofer K 6025-alloy 602 CA VDM Metals GmbH, Werdohl

Material Compliance

REACh RoHS
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