Ni-Cr-Mo based SOLID SOLUTION alloy. NOT PRECIPITATION HARDENABLE; it cannot be hardened by heat treatment, strength is raised only by cold work and is removed again by solution annealing.<\/div>\n<\/div>\n
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Forms<\/div>\n
Plate \u00b7 sheet \u00b7 strip \u00b7 bar \u00b7 flat bar \u00b7 seamless pipe \u00b7 welded pipe \u00b7 tube \u00b7 flange \u00b7 fitting \u00b7 forging. All forms are supplied to order.<\/div>\n<\/div>\n
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Standards<\/div>\n
AMS 5530<\/b> \u2014 sheet, strip and plate (SAE title: Alloy Sheet, Strip, and Plate, Corrosion and Heat Resistant, 58Ni – 15.5Cr – 16Mo – 3.8W – 5.5Fe, Solution Heat Treated). \u00b7 AMS 5750<\/b> \u2014 bars, forgings and rings (SAE title: Alloy Bars, Forgings, and Rings, Corrosion and Heat Resistant Nickel Base – 15.5Cr – 16Mo – 3.8W – 5.5Fe, Solution Heat Treated). NO N10276 MATCH IS STATED FOR EITHER NUMBER IN THE SAE TEXT \u2014 see the note below. \u00b7 ASTM B575 \/ ASME SB-575 \u2014 plate, sheet and strip. \u00b7 ASTM B906 \u2014 strip and thin sheet (general requirements). \u00b7 ASTM B574 \/ ASME SB-574 \u2014 round, square and hexagonal bar. \u00b7 ASTM B472 \u2014 billet and bar stock. \u00b7 ASTM B564 \/ ASME SB-564 \u2014 forgings. \u00b7 ASTM B462 \/ ASME SB-462 \u2014 forged or rolled flanges and pressure fittings. \u00b7 ASTM B366 \/ ASME SB-366 \u2014 welded and seamless fittings (solution anneal requirement: 2050 \u00b0F \/ 1121 \u00b0C minimum). \u00b7 ASTM B622 \/ ASME SB-622 \u2014 seamless pipe and tube. \u00b7 ASTM B619 \/ ASME SB-619 \u2014 welded pipe. \u00b7 ASTM B626 \/ ASME SB-626 \u2014 welded tube. \u00b7 ASTM B829 (general requirements, seamless) \u00b7 ASTM B751 and B775 (general requirements, welded). \u00b7 Welding consumables: AWS A5.14 ERNiCrMo-4 (wire, UNS N10276 \/ W.Nr. 2.4886) \u00b7 AWS A5.11 ENiCrMo-4 (covered electrode, UNS W80276 \/ W.Nr. 2.4887) \u00b7 ASME Section IX F-No. 43. \u00b7 Sour service: NACE MR0175 \/ ISO 15156. \u00b7 European pressure vessel approval: VdTUV 400 \u00b7 AD 2000. \u00b7 ASME BPVC Section II Part B; design temperature ceiling 538 \u00b0C for Section I, 677 \u00b0C for Section VIII Div. 1 and 427 \u00b0C for Section VIII Div. 2. \u00b7 ISO 6208 (plate, sheet, strip) \u00b7 ISO 9725 (forgings).
AMS 5530 AND AMS 5750 ARE HISTORICAL HASTELLOY C SPECIFICATIONS. Both SAE titles give the composition as ’58Ni – 15.5Cr – 16Mo – 3.8W – 5.5Fe’ and NEITHER TITLE CARRIES A UNS NUMBER; no N10276 match is stated in the SAE text.<\/span><\/div>\n<\/div>\n\n
Advantage<\/div>\n
Resistance to both reducing and oxidizing chloride-bearing media in one alloy. In numbers: PRE (pitting resistance equivalent) 68 (Alleima). In acidified 6% FeCl3 the critical pitting temperature is above 150 \u00b0C and the critical crevice temperature is 55 \u00b0C (Haynes International).<\/div>\n<\/div>\n
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Welding<\/div>\n
Filler metal: matching filler AWS A5.14 ERNiCrMo-4 (wire) and AWS A5.11 ENiCrMo-4 (covered electrode). For joints to carbon or low alloy steel, ERNiCrMo-3 \/ ENiCrMo-3 is used. Special Metals gives INCO-WELD 686CPT filler where higher corrosion resistance is required.<\/div>\n<\/div>\n
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Limits<\/div>\n
1) STRESS RELIEVING IS PROHIBITED: post-weld stress relieving around 620-650 \u00b0C is not applied. Haynes International’s wording: ‘Post-weld stress relieving in the 1200 \u00b0F (650 \u00b0C) range is not recommended for HASTELLOY C-276 alloy.’ Carpenter Technology states that ‘stress relief heat treatments are not effective.’ The reason is that mu\u2026<\/div>\n<\/div>\n