Project Description

Hastelloy G-35 (UNS N06035)

Hastelloy G-35 (UNS N06035) is a nickel-chromium-molybdenum alloy designed to resist “wet process” phosphoric acid, which is used in the production of fertilizers. Similar to Hastelloy G-30, Hastelloy G-35 alloy also has excellent resistance to localized attack in the presence of chlorides, since this can be a problem beneath deposits in evaporators used to concentrate “wet process” phosphoric acid. Besides, it is much less susceptible to chloride-­induced stress corrosion cracking than the stainless steels and nickel-­chromium-­iron alloys traditionally used in “wet process” phosphoric acid.

Due to the high chromium content, Hastelloy G-35 is extremely resistant to other oxidizing acids, such as nitric, and mixtures containing nitric acid. It possesses moderate resistance to reducing acids, as a result of its appreciable molybdenum content and unlike other Ni-Cr-Mo alloys, it is very resistant to “caustic de­alloying” in hot sodium hydroxide.

Equivalent Grades

TrademarksGBJISKSASTMUNSDINW.NrGOSTBSNF
Hastelloy G-35Hastelloy G-35N06035NiCr33Mo82.4643

Product Forms

Wire, Bar, Strip, Sheet, Plate, Tube, Pipe, Pipe Fittings, Forgings

Chemical Composition,%

CPSMnSiCrNiCoMoWAlCuVFe
≤0.05≤0.03≤0.015≤0.50≤0.6032.25~34.25Bal≤1.007.60~9.00≤0.60≤0.40≤0.30≤0.2017.00~20.00

Typical Physical & Mechanical Properties (RT, Solution Annealed)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaElongation,%
8.221332~136171031766

Specifications

Rod, Bar, Wire, ForgingsASTM B462, ASTM B472, ASTM B564, ASTM B574, ASME SB462, ASME SB472, ASME SB564, ASME SB574
Plate, Sheet, StripASTM B575, ASME SB575
Pipe, TubeASTM B619, ASTM B622, ASTM B626, ASME SB619, ASME SB622, ASME SB626
Welding ProductsAWS A5.14 ERNiCrMo-22, ASME Ⅱ SFA-5.14 ERNiCrMo-22, ASME Ⅸ F-No.43
OthersASTM B366, ASTM B462, ASME SB366, ASME SB462, DIN 17744

Features

  • Excellent resistance to chloride pitting and creative corrosion cracking
  • Immune to chloride ion stress corrosion
  • Maintains high strength at elevated temperatures
  • Resistant to sea water, in both flowing and stagnant condition
  • Heat resistant

Applications

  • Marine engineering
  • Furnace & gas turbines
  • Chemical processing involving phosphoric acid, sulfuric acid and nitric acid
  • Nuclear fuel reprocessing, nuclear waste processing
  • Pickling operations
  • Petrochemical
  • Fertilizer manufacture
  • Pesticide manufacture
  • Gold ore extraction