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Introduction
UNS S66286also be known as INCOLOY A-286 stainless steel,is a precipitated stainless steel that still has a certain strength at high temperatures up to 700°C, exceeding austenitic stainless steel. INCOLOY A-286 alloyhas a higher nickel content than type 304 and also includes precipitation during use to precipitate the γ' phase [Ni3(Al,Ti)], resulting in a particularly reinforced metal at high temperatures.
Specification: ASTM A959-09
Chemical components (%)
Composition | C | Si | Mn | P | S | Cr | Ni | Mo | Al | V | Ti | B |
Min | \ | \ | \ | \ | \ | 13.50 | 24.00 | 1.00 | \ | 0.10 | 1.90 | 0.001 |
Max | 0.08 | 1.00 | 2.00 | 0.04 | 0.03 | 16.00 | 27.00 | 1.50 | 0.35 | 0.50 | 2.35 | 0.010 |
Mechanical properties
Rigidity | Tensile strength | Yield strength | Elongation |
≤90Rb | ≥950MPa | ≥590MPa | ≥15% |
Physical properties
Density | Melting points | Specific heat | Magnetism | Resistivity | Thermal conductivity | Linear expansivity |
7.93g/cm3 | 1340-1400℃ | 460J/(Kg.℃） | \ | 91μΩ·m | 12.2W/(m.k)(100℃) | 16.5×10-6/K(0-100℃) |
Advantages
(1)Performance:has excellent strength and hardness at high temperatures, with a bending strength of up to approximately 760MPa and a tensile strength of 980MPa. The hardness at high temperature is HB190-250.
(2)Corrosion resistance:good corrosion resistance in high temperature and oxidizing environments, and can resist acid, alkali, chloride and other corrosive media.
(3)Heat treatment properties:can obtain different organizational structures and mechanical properties through heat treatment, and can achieve tempering strengthening and aging strengthening, and improve the high-temperature strength and hardness of the alloy.
(4)Processing performance: good processability and can be used for hot and cold deformation processing, forging, welding and other processes, and is used to manufacture parts of various complex shapes.
Applications
Aero engine components
Engine compressor disc, turbine disc, bearing ring
casing, supercharger, turbine wheel
After burner parts and fasteners
Fasteners and plate welding load-bearing parts
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