Osaka Stainless Co., Ltd.

News Products About us Facilities Contact Site map

Nickel Alloy/Titanium

Below you can find our current stock of Alloy K500 (Monel K500). We Specialise in Round Bars, Hex Bars, Hex Bolts, Nuts, Washers, Wire Rods and Flanges.


ALLOYK500 is a Ni-Cu alloy with age-hardening properties imparted by alloying additions of aluminium and titanium. Its basic composition is similar to that of ALLOY400 but the alloying additions make it age hardenable under
controlled conditions of temperature and time.

Characteristics of ALLOY K500

  • excellent corrosion resistance in an extensive range of natural and chemical environments
  • excellent resistance to chloride-ion stress-corrosion cracking
  • very high strength and hardness After age-hardening

After age-hardening of characeristics of ALLOY K500

  • approximately 2 to 3 times higher mechanical properties than the ALLOY400>
  • high tensile properties up to about 650 ‹C (1200 ‹F)
  • good fatigue and corrosion fatigue resistance
  • low permeability; non-magnetic down to -135 ‹C (-210 ‹F)


Stock Form and Sizes

Round BarSpecification:ASTM B865@QQ-N-286@NACE MR0175(ISO 15156)
Stock Specification: Hot Rolled + Aged
1.2 1.6 2 2.6 3 3.5 4 4.4 5 5.3 6 7.1 8 8.95 10
12 13 16 18 19 20 22 24 25 28 30 32 35 36 38
š š š     š š   š š š š š   š
40 42 45 50 55 60 65 70 75 80 85 90 95 100 105
š š š š š š š š š š š š   š  
110 115 120 125 130 135 140 145 150 155 160 165 170 180 190
š   š   š   š   š   š     š  
200 210 220 230 250 280 300                
š š   š š š                  

¦@Rolling Thread sizes available in C276(M4 to M10)@–New Incoming Stock in 2015.

Sourcable Ex-Stock Material for Other Forms from Japanese Distributor

Plate Pipe Welding
Rod & Wire
Min Max
N/A N/A ™ N/A

¦@¢EEELimited Sizes Only@™EEEPlease enquire

Corrosion resistance

In general, the corrosion resistance of Alloy K500 is similar to that of ALLOY400. Excellent resistance is shown to a wide range of media from pure water to mineral acids, salts and alkalis. Alloy K500 is virtually immune to chloride-ion stress-corrosion cracking. In the aged condition, the alloy may be susceptible to stress-corrosion cracking in moist, aerated hydrofluoric acid vapour at stresses near the yield strength. In high-velocity seawater and in marine atmospheres, good corrosion resistance is shown but, in slow-moving or stagnant seawater, pitting may occur. Alloy K500 also shows good resistance in sour-gas environments.


ALLOYK500 finds wide application in the marine, chemical, petrochemical and shipbuilding industries.

Typical applications are:

  • valve seals, pump sleeves and wear rings in marine
    environments - high strength and resistance to seawater
  • pump shafts for fire-fighting pumps - high strength (resulting
    in smaller diameter shafts) and resistance to flowing
  • fasteners, e.g. bolts, used in marine atmospheres and tidal
    waters - resistance to chloride-containing environments
  • doctor blades and scrapers
  • towing cable armouring - high strength, non-magnetic
    properties and resistance to seawater
  • springs - resistance to a variety of corrosive media
  • oil well drilling equipment such as non-magnetic drill
    collars, valves and instrumentation sleeves - resistance to
    chloride-containing media and sour-gas environments
  • aviation instrument components - non-magnetic properties

Chemical composition

  Ni Fe C Mn Si Cu Al
min(%) 63.0 0.5       27.0 2.30
max(%)   2.0 0.20 1.5 0.50 33.0 3.15
  Ti S P Zn Pb Sn
min(%) 0.35          
max(%) 0.85 0.010 0.020 0.020 0.006 0.006

Mechanical propertiesiRound Barj

  Condition Yield Strength(Mpa) Tensile Strength(Mpa) Elongation(%) Hardness(HB)
ASTM Min Value Soft AnnealedEAged 690 965 20 265
Typical Values at RT Hot workedEAged 902 1078 25 305
Typical Values at RT Cold workedEAged 902 1078 22 310
Typical Values at RT Soft AnnealedEAged 686 1000 28 285

Please contact us with any questions about reference or value of plate and pipe.

International Specification Comparison chart

  Material Round Bar Plate
JIS NW5500 H4553 H4551
DIN 2.4375 17752  
All the information on this website is published in good faith and for general information purpose only and not for technical design purposes. We do not make any warranties about the completeness, reliability and accuracy of this information. Any action you take upon the information on our website is strictly at your own risk. and we will not be liable for any losses and damages in connection with the use of our website.

To top of the page