Stellite 1

Catalog : Stellite 1

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Stellite 1



Cr W C Others Hardness Density Melting Range



28 – 32





Ni, Fe, Si,

Mn, Mo

50-58 HRC

550-720 HV

8.69 g/cm3

0.314 lb/in3

2175-2450 °F

1190-1345 °C


Stellite 1 is a hardfacing alloy possessing excellent abrasion and corrosion resistance for applications such as pump sleeves, rotary seal rings, wear pads, expeller screws and bearing sleeves. It retains its hardness at temperatures in excess of 760°C (1400°F).

Stellite 1 contains a high proportion of hard, wear resistant primary carbides. These render the alloy well suited to applications involving extreme low-angle erosion and severe abrasion, with some sacrifice in toughness. Compared to other Stellite® alloys it is more crack sensitive, and care should be taken to

Optical micrograph of a Stellite 1 weld overlay


minimize the cooling stresses experienced during casting and hardfacing processes. Due to its high hardness and wear resistance, Stellite® 1 should only be finished by grinding.


Corrosion Resistance

Stellite® 1 has good general corrosion resistance. The typical electrode potential in sea water at room temperature is approx. -0.4 V (SCE). Stellite® 1 corrodes primarily by a pitting mechanism and not by general mass loss in seawater and chloride solutions. More detailed information regarding corrosion resistance can be provided on request.



Nominal Thermal Expansion Coefficient (from 20°C/68°F to stated temperature)

100°C (212°F) 200°C (392°F) 300°C (572°F) 400°C (752°F) 500°C (932°F) 600°C (1112°F) 700°C (1292°F) 800°C (1472°F) 900°C (1652°F)


10.5 11.3 11.8 12.1 12.5 12.8 13.5 13.9


µ-inch/inch.°F 5.8 6.3 6.5 6.7 6.9 7.1 7.5 7.7



Nominal Tensile Properties at Room Temperature

Ultimate Tensile Strength Rm

Yield Stress Rp(0.2%) Elongation

Elastic Modulus

ksi MPa ksi MPa A(%) psi GPa
Castings 79 550 <1 36.0×106


Stellite® HS-1 (*)

173 1195 152 1050 <1 33.4×106


(*) “HS” = HIP-consolidated from the powder form.


Nominal Hot Hardness (DPH) as-cast

20°C (68°F)

100°C (212°F) 200°C (392°F) 300°C (572°F) 400°C (752°F) 500°C (932°F) 600°C (1112°F) 700°C (1292°F) 800°C (1472°F) 900°C (1652°F)
606 573 540 508 485 453 406 330 217



Thermal and Electrical Properties

Approximate value at Room Temperature

Thermal conductivity

14.5 W/m.K

100.5 Btu-in/hr/ft2/°F

Electrical resistivity 94.0 µ

37.0 µ-ohm.inch


Product Forms and Cross Reference Specifications

Stellite® 1 is available as welding wire, rod, powder, and electrodes, finished castings and HIP consolidated blands or parts. Deloro Stellite also offers hard facing services.

Stellite® 1 can be supplied to the following specifications:


UNS R30001 Stellite® 1 Rod, castings, powder for PTA or laser processing AWS A5.21 / ASME BPVC IIC SFA 5.21 ERCoCr-C

Stellite® 1 Rod

UNS R30001

Stellite® HS-1 (HIP-consolidated from powder) AWS A5.21 / ASME BPVC IIC SFA 5.21 ERCCoCr-C Stellite® 1 Wire
UNS W73031 Stellite® 1 Wire AWS A5.13 / ASME BPVC IIC SFA 5.13 ECoCr- C

Stellite® 1 Electrode



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