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3J1 is a kind of iron-nickel-chromium austenitic precipitation hardening high-elastic alloy. After solution treatment it has good ductility, low hardness and is easy processing. After solution or cold deformation and then aging treatment, it can achieve high mechanical properties and elastic properties. Such alloy has high strength, high elastic modulus, and smaller anelasticity and elastic hysteresis, weakly magnetic, good corrosion resistance and thermal stability characteristics. It can be used at higher temperatures, larger stress or corrosive media conditions. Similar alloy's names in different standards:
Beiye designation | China Standard designation | Russia designation |
3J1 | 3J1 | ЭИ702,36HXTЮ |
C | ≤0.05 | Ni | 34.50～36.50 |
Si | ≤0.80 | Cr | 11.50～13.00 |
Mn | ≤1.00 | Ti | 2.70～3.20 |
P | ≤0.02 | Al | 1.00～1.80 |
S | ≤0.02 | Fe | bal. |
(1) Strip
Soft | Hard | |
Yield Strength | ≥735 MPa (106.52 ksi) | ≥980 MPa (140.03ksi) |
Tensile Strength | ≥1176 MPa (170.43 ksi) | ≥1372 MPa (198.84 ksi) |
Elongation | ≥8% | ≥5% |
(2) Wire
Hard | |
Tensile Strength | ≥1470 MPa (213.04 ksi) |
Elongation | 5% |
(3) Bar (Cold Drawn)
Hard | |
Tensile Strength | ≥1372MPa (198.84 ksi) |
Elongation | ≥5% |
(4) Bar, Plate (Hot-rolled, Hot forging)
Hard | |
Tensile Strength | ≥1176MPa (170.43 ksi) |
Elongation | ≥10% |
Density | 8.0 g/cm3 (0.29 lb/in3) |
Thermal expansion(20~100℃) | (12.0～14.0）×10 -6/K |
Resistivity | 1.02 µΩ•m |
(1) Bar, Plate (Hot-rolled, Hot forging)
Solution process: Heating temperature 970℃; Holding 15min; Water quenched.
Aging process: Heating temperature 730℃; Holding 240min; Furnace cooling below 300℃ and discharge.
(2) Strip
Aging process: Heating temperature 630℃; Holding 240min; Push the furnace cooled quickly; Long average temperature furnace cooling.
(3) Wire
Aging process: Heating temperature 630℃; Holding 240min; Push the furnace cooled quickly; Long average temperature furnace cooling.
