Note:
This Cobalt-Chromium-Nickel alloy also known as Elgiloy gives a combination of high strength, ductility and good mechanical properties and is age hardenable. Phynox also has excellent fatigue life, corrosion resistance in numerous environments and is non-magnetic. This alloy is recommended where a high resistance to corrosion and / or low relaxation at temperatures up to 380°C are required.
Relative Grade:Russia | U.S.A. | Japan | France | Standard | 40КНХМ | Elgiloy | NAS604PH
K•R•N | phynox | YB/T5253-1993 |
Grade and Chemical Composition (see Table 1)
Table 1 Grade and Chemical Composition of 3J21
Grade
| Chemical Composition(%) | C | Mn | Si | P | S | Ni | Cr | Co | Mo | Fe | ≤ | 3J21 | 0.07～0.12 | 1.70～2.30 | 0.60 | 0.010 | 0.010 | 14.0～21.0 | 19.0～21.0 | 39.0～41.0 | 6.50～7.50 | Balance |
Remark: The size and shape must be tally with the standard of GB/T15006 for “elastic alloy”. Mechanical Property(see Table 2)
Table 2 Mechanical Property
Shape | Delivery State | Thickness&Diameter/mm | Property&Classfication | Mechanical Property | Tensile Strength (ób/Mpa) | Elongation δ(%) | ≥ | Strip | Cold Rolling | Tk0.20～2.50 | A | 1175～1470 | 5 | B | 1470～1765 | 3 | Wire | Cold Drawn | Dia0.20～5.00 | A | 1275～1570 | | B | 1570～1865 | |
· The strip has been used typically for springs requiring a combination of high strength up to 800°F(427°C),excellent corrosion resistance, and good fatigue properties, but usage is not limited to such applications. Alloy is nonmagnetic. Physical Property (see table 3)
Table 3 Physical Property of 3J21 after aged Item | Target | Modulus of Elasticity E/Mpa | 196000～215500 | Shear Modulus G/Mpa | 73500～83500 | Density (g/cm3) | 8.4 | Mean coefficient of linear expansion20-100°C/(10-6/K) | 14 | Resistivity ρ /(μΩ•m) | 0.92 | Magnetic Rate k/106 | 50～1000 |
Remark: The K value is the value of the centimeter gram second system.
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