Transcription of HEAT AND CORROSION RESISTANT CASTINGS: THEIR …
1 HEAT AND CORROSION RESISTANT CASTINGS: THEIR ENGINEERING PROPERTIES AND APPLICATIONS Publication No 266 NiDl Distributed by the Nickel Development Institute, courtesy of Inco Limited 2 Part I. Heat- RESISTANT Alloy Castings .. 4-26 Introduction .. 4 Typical Casting Compositions of Heat- RESISTANT Alloy Castings, Table I .. 4 Effect of Constituents .. 5 Groups of Heat- RESISTANT Alloy Castings .. 6-8 Chromium-Iron Alloys (HA, HC, HD) Chromium-Nickel-Iron Alloys (HE, HF, HH, HI, HK, IN-519, HL) Nickel-Chromium-Iron Alloys (HN, HP, HT, HU, HW, HX) Chromium-Nickel Alloys (50Cr-50Ni, IN-657) Selecting the Proper Alloy.
2 8 Heat- RESISTANT Alloy Casting Design .. 9 High-Temperature Mechanical Properties .. 9-15 High-Temperature CORROSION Resistance .. 14,16 Room Temperature Properties .. 16 Industrial Applications of Heat- RESISTANT Alloy Castings Aeronautical .. 17 Cement .. 17 Glass & Enameling .. 17-18 Heat Treating .. 18-21 Petroleum, Petrochemical Refining &Chemical .. 22-24 Power Plants .. 25 Steel Mill Equipment .. 26 Smelting & Refining Equipment.
3 26 Contents Pages3 Part II. CORROSION - RESISTANT Alloy Castings .. 27-47 Introduction .. 27 Typical Casting Compositions of CORROSION - RESISTANT Alloy Castings, Table V .. 27 Room Temperature Properties .. 28 Effect of Constituents .. 29-30 Corrosive Attack .. 30-31 Groups of CORROSION - RESISTANT Alloy Castings .. 31-33 Martensitic Alloys (CA-15, CA-40, CA-6NM, CA-6N) ferritic and Duplex Alloys (CB-30, CC-50, CD-4 MCu) Austenitic Alloys (CE-30, CF types, CG-8M, CH-20, CK-20, CN-7M, CN-7MS, IN-862) Precipitation Hardenable Alloys (CB-7Cu-1, CB-7Cu-2) Nickel-Base Alloys (CZ-100, M-35, CY-40, Alloy 625, CW-12M, N-12M, Ni-Si) CORROSION Data.
4 34-37 Industrial Applications of CORROSION - RESISTANT Alloy Castings .. 38-48 Aeronautical .. 38 Architectural .. 38 Chemical & Petroleum .. 39-40 Process Industries Equipment .. 41-44 Hydraulics .. 45 Marine .. 44 Power Nuclear & Conventional .. 45-48 Part Ill. Fabrication Data for Heat & CORROSION - RESISTANT Alloy Castings .. 49-52 Machining .. 49-51 Welding .. 51-52 4 The heat- RESISTANT casting alloys are those composi-tions that contain at least 12% chromium which are capable of performing satisfactorily when used at tem-peratures above 1200 F.
5 As a group, heat- RESISTANT compositions are higher in alloy content than the CORROSION - RESISTANT types. The heat- RESISTANT alloys are composed principally of nickel, chromium and iron to-gether with small percentages of other elements. Nickel and chromium contribute to the superior heat resistance of these materials. Castings made of these alloys must meet two basic requirements: 1. Good surface film stability (oxidation and corro-sion resistance) in various atmospheres and at the temperature to which they are subjected. mechanical strength and ductility to meet high temperature service conditions.
6 The heat- RESISTANT alloys are listed in Table I along with THEIR chemical compositions and designations. Commercial cast heat- RESISTANT alloys can be identified by designations of the Alloy Casting Institute, now a division of the Steel Founders' Society of America, and the American Society for Testing and Materials.* Some of these materials are also listed in the Aerospace Mate- *See ASTM Specification A 297 rial Specifications (AMS) of the Society of Automotive Engineers, United States Government Military Specifi-cations (MIL), the Society of Automotive Engineers Specifications and the Unified Numbering System (UNS) developed by the Society of Automotive Engi-neers and the American Society for Testing and Mate-rials.
7 Standard ACI designations are listed in Table I. The Alloy Casting Institute designations use "H" to indicate alloys generally used in applications where the metal temperature exceeds 1200 F. The second letter indicates the nominal nickel content, increasing from A to X. The chemical compositions of the heat- RESISTANT cast-ing alloys are not the same as those of the wrought alloys. Therefore, Table I lists only the nearest wrought alloy AISI type number. Alloy Casting Institute designa-tions or THEIR equivalents should always be used when identifying castings.
8 The SAE specification designations use the nearest wrought composition (AISI type number) and prefix it with the number 70 For heat- RESISTANT castings: for ex- ample, 70310 is equivalent to HK. In the Unified Num- bering System, the Jxxxx number series is assigned to cast I Compositions of Heat- RESISTANT Alloy Castings CHEMICAL COMPOSITION, % Alloy Casting Institute Designation Alloy Type ASTM Specification Nearest AISI Type UNS No. Ni Cr C Mn max Si max Mo max Other HA 8-10Cr A217 8-10 max bal HC 28Cr A297 446 J92605 4 max26-30 max Fe bal HD 28Cr-6Ni A297 327 J93005 4-7 26-30 max Fe bal HE 28Cr-9Ni A297 312 J93403 8-11 26-30 Fe bal HF 19Cr-9Ni A297 302B J92603 9-12 19-23 Fe bal HH 25Cr-12Ni A297.
9 A447 309 J93503 11-14 24-28 Fe bal HI 28Cr-15Ni A297 J94003 14-18 26-30 Fe bal HK 25Cr-20Ni A297, A351 A567 310 J94224 18-22 24-28 Fe bal IN-5191 24Cr-24Ni 23-25 23-25 Cb ; Fe bal HL 30Cr-20Ni A297 J94604 18-22 28-32 Fe bal HN 25Ni-20Cr A297 J94213 23-27 19-23 Fe bal HP 35Ni-26Cr A297 J95705 33-37 24-28 Fe bal HP-50WZ 35Ni-26Cr 33-37 24-28 W 4-6; Zr.
10 Fe balHT 35Ni-17Cr A297, A351 330 J94605 33-37 15-19 Fe bal HU 39Ni-18Cr A297 J95405 37-41 17-21 Fe bal HW 60Ni-12Cr A297 58-62 10-14 Fe bal HX 66Ni-17Cr A297 64-68 15-19 Fe bal Chromium
