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38NKD ribbon, round, wire
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General characteristics
Alloy 38NKD refers to the precision alloys group with the given thermal coefficient of linear expansion (ТКЛРх106 in the temperature range -60 +400°C not higher than the 7.8[1/C°]). Used for vacuum seals with glass marks P-6 and С72−4.
Precision alloys are mainly produced on the basis of chromium, Nickel, copper, niobium, cobalt. They belong to the high-alloyed alloys with rare physical characteristics: magnetic, elastic, thermal, electrical. These unique qualities are due to the precision of the chemical. composition, thoroughness manufacturing and processing, absence of impurities. This group of alloys used in precision machine tools, in the production of various precision electronic devices, in innovative technologies.
| Welding: | |
|---|---|
| weldability limited | — welding is possible in the process of heating up to temp. 100−120? C and further thermal treatment |
| konovalivka | in order to obtain quality welded joints, it is necessary to perform additional operations: during welding heating up to temp. 200−300°C, heat treatment (annealing) after welding. |
| Welded without any restrictions | — welding is carried out without further heat treatment and pre-heating. |
Chemical composition 38NKD, in percent.
| Ni | P | Co | C | S | Si | Mn | Fe |
|---|---|---|---|---|---|---|---|
| to 0.015 | 4.5 -5.5 | 4.5 -5.5 | to 0.3 | up to 0.02 | to 0.4 | 37.5 -38.5 | 49.72 -53.5 |
The mechanical properties of the alloy 38NKD at 20 °C.
| mm | kJ / m2 | % | % | MPa | MPa | - | - | |
|---|---|---|---|---|---|---|---|---|
| Products | Dimensions | KCU | d5 | y | blower SB | sT | Heat treatment. | Eg. |
| 23 | 450−550 | annealing |
| Mechanical characteristics: | ||
|---|---|---|
| — Short-term tensile strength in [MPa] | blower SB | |
| — Yield strength (limit of proportionality) for the residual strain, [MPa] | sT | |
| — at break elongation in [ % ] | d5 | |
| — narrowing of the relative in [ % ] | y | |
| — the viscosity of the shock, in [ kJ / m2] | KCU | |
| — Brinell hardness [MPa] | HB | |
Physical characteristics 38NKD.
| J/(kg·deg) | kg/m3 | W/(m·deg) | MPa | Grad | 1/Deg | Ohm·m |
|---|---|---|---|---|---|---|
| C | r | l | E 10 — 5 | T | a 10 6 | R 10 9 |
| 1.5 | 20 | 500 |
| Physical characteristics of this brand of alloy: | |
|---|---|
| — 1st kind of modulus of elasticity, [MPa] | — E |
| — The heat capacity of the material (or the ratio of teploprovodna.), in [W/(m·deg)] | -l |
| — The temperature required to obtain these properties, [Grad] | — T |
| — linear coefficient. temp. extensions to [1/Deg] (temp. the interval 20o), | -a |
| — electrical resistivity, [Ohm·m] | -R |
| — The density of this material, [kg/m3] | -r |
| — The specific heat of this material in [j/(kg·deg)] (temp. the interval 20 ° C) | -C |
Magnetic characteristics:
| the coercive force (not more than) [A/m ] | Hc |
|---|---|
| the magnetic permeability (not above) [ MH/m ] | Umax |
| — specific losses (no higher) frequency 50 Hz, magnetic induction of 1.0 T [ W/kg ] | P1.0/50 |
| — T magnetic induction intensity of a magnetic field of not less than 100, in a magnetic field [ A/m ] | B100 |
Buy at best price
The range of products from alloy 38NKD, represented by LLC «AVEK global» can satisfy almost any consumer. This alloy belongs to the popular group of steel products due to its real value and variety of output options. Quality metal products is guaranteed absolute observance of all technological norms of production. In the absence of the base performance required of the product and if necessary other option products, we can produce custom sizes to order.