Alloy SGS-75

Stainless and self-lubricating nickel-based superalloys.
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The SGS-75 alloy based on nickel and chromium is particularly effective in terms of its resistance to seizure in contact with stainless steels. Its stainless and self-lubricating properties allow it to be used for the production of moving parts in contact with stainless steels, without lubrication, with reduced operating clearance.


SEVA Designation : SGS-75

Standard designation :
ASTM A494M grade CY5SnBiM

Chemical Analysis

Ni : Bal
C : 0.05 max
Cr : 11-14
Mo : 2-3.5
Si : 0.05 max
Mn : 1. max
Fe : 2 max
Bi : 3-5
Sn : 3-5

Mechanical properties

Hardness: 145 HB

Tensile test at room temperature:

Rp0,2 (MPa) Rm (MPa) A (%)
220 300 5

Flexural modulus (Young): 185 GPa


Areas of use

• Chemistry
• Pharmacy
• Food industry
• Nuclear

Maximum temperature of use


Types of parts produced
Chemical, pharmaceutical and food industries: applications involving dry friction with stainless steels such as 316 L:
• Rotating or static parts of pumps: rotors, pistons etc.
• Filling systems: rotary valves, dosing sprues etc.
Nuclear industry: bearings and other components for handling systems in hostile environments. Wide range of standard parts available on request: round bars (cylinders) and bushings (hollow bars).

Standard structure

The microstructure of the SGS-75 alloy consists of an austenitic matrix rich in nickel, chromium and molybdenum.
The secondary phase rich in tin and bismuth gives the alloy tribological properties.

Physical properties

Density at 20°C: 8,5

Approximate melting range: 140°C - 1470°C

Chemical properties

  Compatibility Remarks
Oxidization resistance ●●●●● Results available
to ascertain compatibility
at contact
with food products
depending on
temperature and
time of exposure.
Inertia ●●●●○

Other properties

Magnetism: Non-magnetic


SEVA produces the SGS-75 alloy in an electric induction furnace.
Cast in a sand mold.
Heat treatment: none.

Compatible processes

  Compatibility Remarks
Machining ●●●●○ Vitesse de coupe
préconisée :
30 à 50 m/min
Welding ○○○○○  


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Product datasheet
Product picture
Documentation technique SGS-75
Fiche technique - SGS-75
Technical specifications SGS-75