HASTELLOY® B32.4600 – UNS N10675 – NiMo 29 Cr

B3 Alloy is an additional member of the nickel-molybdenum family of alloys with excellent resistance to hydrochloric acid at all concentrations and temperatures. It also with stands sulfuric, acetic, formic and phosphoric acids, and other non oxidizing media. B3 Alloy has a special chemistry designed to achieve a level of thermal stability greatly superior to that of its predecessors,e.g. B2 alloy. B3 alloy has excellent resistance to pitting corrosion, to stress-corrosion cracking and to knife-line and heat-affected zone attack.


seamless-pipe Seamless Tubes

welded-pipe Welded Tubes  stock
plate Plates  stock
bar Bars  stock
flanges Flanges
accessories Fittings


  • Chemical processes
  • Vacuum furnaces
  • Mechanical components in reducing environments

General characteristics

  • Maintains excellent ductility during transient exposures to intermediate temperatures
  • Excellent resistance to pitting, corrosion and stress-corrosion cracking
  • Excellent resistance to knife-line and heat-affected zone attack
  • Excellent resistance to acetic, formic and phosphoric acids and other non-oxidizing media
  • Resistance to hydrochloric acid at all concentrations and temperatures
  • Thermal stability superior to alloy B-2

Technical information



Hastelloy B3 – UNS N10675
Product Norm ASTM
Seamless Tubes B-622
Welded Tubes B-626
Plates B-333
Bars B-335

Chemical specifications %


Hastelloy B3 – UNS N10675
Element Simbol Maximum %
Carbon C 0,01
Manganese Mn 3,0
Phosphorus P 0,030
Sulfur S 0,010
Silicon Si 0,10
Nickel Ni 65,0
Chrome Cr 1,0-3,0
Molybdenum Mo 27,0-32,0
Titanium Ti 0,20
Aluminium Al 0,50
Tungsten W 3,0
Coulomb (Niobium) Cb(Nb) 0,20
Copper Cu 0,20
Iron Fe 1,0-3,0
Vanadium V 0,20
Zirconium Zr 0,10
Tantalus Ta 0,20

Mechanical Properties

Hastelloy B3 – UNS N10675
Norm Rm min. Rp 0,2% min. E4d min.% Z min.% T.I.(J) HR B HB
B-333 110 (760) 51 (350) 40 100
B-3335 110 (760) 51 (350) 40
B-622 110 (760) 51 (350) 40
B-626 110 (760) 51 (350)