Molybdenum Rods, Forged Parts
01
Description
Thanks to the low content of interstitial impurities and metallic impurities and the small-grain texture of the material, the finished products boast outstanding plastic properties.
Some of molybdenum's important features in terms of its industrial application include its high heat resistance, electric conductivity and heat conductivity, its relatively low thermal neutron capture cross-section with a volume weight almost twice lower than that of tungsten, etc. Molybdenum's resistance to creep and stress-rupture at high temperatures in a vacuum and in protective atmosphere (argon, hydrogen) is noticeably higher than the same properties of many metals used as the base for heat-resistant materials.
As a result of molybdenum's low temperature coefficient of linear expansion and its high melting point, it ensures the dependable functionality of structures made from molybdenum that operate at high temperatures.
Molybdenum's high thermal conductivity is several times greater than that of ordinarily used heat-resistant alloys, which prevents thermal stresses during rapid heating and cooling.
Molybdenum is resistant to the effects of acids, alkalis and resistive in many molten metals and liquid glasses.
02
specifications
1. Mo-PM molybdenum rods and forged parts
Current powder metallurgy methods ensure a high level of purity of molybdenum in terms of metallic interstitial impurities (C, N, O, H), the necessary microstructure for use as a heat-resistant construction material in electronics and other devices functioning in extremely high temperatures.
The chemical composition of rods and forged parts is ensured to meet or surpass the norms set for pristine molybdenum powder. Since 2002, the company has primarily used Mo powder 99,95 molydbenum powder in its products.
By virtue of its low concent of interstitial impurities and metallic impurities, as well as its small-grain structure, finished products are distinguished by outstanding plastic characteristics.
Dimensions of Mo-PM rods and forged parts
Hot-rolled rods are produced with diameters of between 10 to 40 mm, and forged products (forged rods, cylinders, cubes, parallelipeds and sheets with a diameter or rectangular edge of 30-300mm to 1500 mm in length with a surface cleansed from oxides or tooled.
At the client's request, rods and forged parts are delivered with ground, turned or milled (for flat forged products) surfaces, whose dimensions and allowances are determined by the consumer's plans or order.
Microstructure
Microstructure is controlled in rods with a diameter of 30 mm or less. A full recrystallization structure is not permitted, unless otherwise requested by the client.
Guaranteed mechanical properties of hot-rolled rods Mo-PM
Upon agreement with the client, rods are delivered without any set mechanical properties with a guarantee that they meet the parameters established by the standard.
2. High precision Mo99.95-PM molybdenum rods
Deformation method
Hot rolling, extrusion, forging or cobbing.
Shapes of rods and forged parts
Round, rectangular, or other cuts.
Surface finishing
Rods are produced chemically cleansed of oxides or machined: tooled or ground. Local defects (with the exception of cracks, backfins and blemishes) on the surface of oxide-cleansed rods that do not cause the rods to exceed the maximum dimensions are permitted.
Roughness requirements for tooled rods are set based on the client's requests. Unless otherwise requested, the roughness of tooled rods is set at Ra 2.5 maximum, and the roughness of ground rods at Ra 1.25 maximum.
Guaranteed mechanical properties of Mo99.95-PM rods
Rod length is established in accordance with the client's request.
Length tolerances are < ± 6.35 mm.
Curvature < 1.27 mm for 305 mm of length.
Acceptable deviations for rod dimensions of rectangular or other cuts other than round cuts are established based on client request.
Norms of mechanical properties are set for material following annealment at 900 0С over the course of 0.5 hrs.
Thermal treatment and microstructure
Rods are thermally treated, with annealment for internal stress removal, unless otherwise requested by the client.
In the microstructure of rods with a diameter of 40 mm or less, full recrystallization structure is not permitted, unless otherwise requested by the client, and special requests regarding recrystallization annealing or structure parameters are agreed to.
Current powder metallurgy methods ensure a high level of purity of molybdenum in terms of metallic interstitial impurities (C, N, O, H), the necessary microstructure for use as a heat-resistant construction material in electronics and other devices functioning in extremely high temperatures.
The chemical composition of rods and forged parts is ensured to meet or surpass the norms set for pristine molybdenum powder. Since 2002, the company has primarily used Mo powder 99,95 molydbenum powder in its products.
By virtue of its low concent of interstitial impurities and metallic impurities, as well as its small-grain structure, finished products are distinguished by outstanding plastic characteristics.
Dimensions of Mo-PM rods and forged parts
Hot-rolled rods are produced with diameters of between 10 to 40 mm, and forged products (forged rods, cylinders, cubes, parallelipeds and sheets with a diameter or rectangular edge of 30-300mm to 1500 mm in length with a surface cleansed from oxides or tooled.
Annealment
At the client's request, products are manufactured with annealment for internal stress removal.
At the client's request, rods and forged parts are delivered with ground, turned or milled (for flat forged products) surfaces, whose dimensions and allowances are determined by the consumer's plans or order.
Microstructure
Microstructure is controlled in rods with a diameter of 30 mm or less. A full recrystallization structure is not permitted, unless otherwise requested by the client.
Guaranteed mechanical properties of hot-rolled rods Mo-PM
| Diameter, mm | Durability σ в, Н/mm2 (kgf/mm2) | Relative elongation, δ % |
| min | ||
| 14,5-29 | 640 (65) | 20 |
| 30-40 | 590 (60) | 15 |
Upon agreement with the client, rods are delivered without any set mechanical properties with a guarantee that they meet the parameters established by the standard.
2. High precision Mo99.95-PM molybdenum rods
Deformation method
Hot rolling, extrusion, forging or cobbing.
Shapes of rods and forged parts
Round, rectangular, or other cuts.
Surface finishing
Rods are produced chemically cleansed of oxides or machined: tooled or ground. Local defects (with the exception of cracks, backfins and blemishes) on the surface of oxide-cleansed rods that do not cause the rods to exceed the maximum dimensions are permitted.
Roughness requirements for tooled rods are set based on the client's requests. Unless otherwise requested, the roughness of tooled rods is set at Ra 2.5 maximum, and the roughness of ground rods at Ra 1.25 maximum.
Guaranteed mechanical properties of Mo99.95-PM rods
| Diameter, mm | Durability σ в, Н/mm2 | Relative elongation δ , % | Vickers hardness HV10 |
| min | |||
| 3,18-10,32 | 515 | 15 | Not specified |
| > 10,32-22,2 | 620 | 18 | 230-280 |
| > 22,2-28,6 | 585 | 15 | 225-270 |
| > 28,6-47,6 | 515 | 10 | 215-260 |
| > 47,6-73 | 480 | 10 | 210-250 |
| > 73-88,9 | 450 | 10 | 205-240 |
Rod length is established in accordance with the client's request.
Length tolerances are < ± 6.35 mm.
Curvature < 1.27 mm for 305 mm of length.
Acceptable deviations for rod dimensions of rectangular or other cuts other than round cuts are established based on client request.
Norms of mechanical properties are set for material following annealment at 900 0С over the course of 0.5 hrs.
Thermal treatment and microstructure
Rods are thermally treated, with annealment for internal stress removal, unless otherwise requested by the client.
In the microstructure of rods with a diameter of 40 mm or less, full recrystallization structure is not permitted, unless otherwise requested by the client, and special requests regarding recrystallization annealing or structure parameters are agreed to.
03
advantages
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Significant production experience
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Strict quality control of manufactured products
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Own R&D laboratory
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Flexible discount system
04
Product names
JSC POLEMA produces rods of the following grades:
1) Mo-PM molybdenum rods and forged parts
2) High precision Mo99.95-PM molybdenum rods
You can get full list of products by contacting our sales managers.: export_polema@metholding.com тел.:+7 4872 25-06-76.
1) Mo-PM molybdenum rods and forged parts
2) High precision Mo99.95-PM molybdenum rods
You can get full list of products by contacting our sales managers.: export_polema@metholding.com тел.:+7 4872 25-06-76.
05
chemical composition
Guaranteed chemical composition of Mo powder 99.95 Spec.14-22-160-2002 for the production of molybdenum rods and forging parts:
*The weight percentage of Mo in MP-Мо powder is determined by subtracting the sum of the metallic impurities from 100%, controlled by Inductively Coupled Plasma Mass Spectrometry (ICP-MS).
Guaranteed chemical composition for high precision Mo99.95-PM molybdenum rods:
* The weight percentage Mo is determined by subtracting from 100% the total content of metallic impurities (without including gas-forming elements).
| Grade | Min Мо, %* | Chemical composition, ppm, max | ||||||||||||
| Fe | Al | Ni | Si | Mg | Na | K | Ca | W | Mn | Zn | C | ∑Ме** | ||
| Mo-PM | 99,95 | 100 | 30 | 50 | 50 | 20 | 30 | 80 | 40 | 130 | 10 | 5 | 40 | 500 |
*The weight percentage of Mo in MP-Мо powder is determined by subtracting the sum of the metallic impurities from 100%, controlled by Inductively Coupled Plasma Mass Spectrometry (ICP-MS).
The gas-forming impurities C, O, N, H, S, F, Cl are not taken into account in the calculations of the proportion of molybdenum.
** Σ Ме – amount of metallic impurities.
Guaranteed chemical composition for high precision Mo99.95-PM molybdenum rods:
| Grade | Min Мо, %* | Impurities, ppm, max | ||||||||||||
| O | N | C | Fe | Al | Ni | Si | Mg | Na | K | Ca | Na | W | ||
| Mo99.95-PM | 99,95 | 70 | 50 | 100 | 100 | 30 | 50 | 50 | 20 | 30 | 80 | 40 | 30 | 130 |
| Total content of metallic impurities < 500 | ||||||||||||||
* The weight percentage Mo is determined by subtracting from 100% the total content of metallic impurities (without including gas-forming elements).
06
miscellaneous
At the client's request, products are manufactured with annealment for internal stress removal.
Upon agreement with the client, rods are delivered without any set mechanical properties with a guarantee that they meet the parameters established by the standard.
Roughness requirements for tooled rods are set based on the client's requests. Unless otherwise requested, the roughness of tooled rods is set at Ra 2.5 maximum, and the roughness of ground rods at Ra 1.25 maximum.
The acceptable deviations in the size of the acceptable deviations in the size of rods of rectangular or other cross-section other than round are established by agreement with consumers.
Upon agreement with the client, rods are delivered without any set mechanical properties with a guarantee that they meet the parameters established by the standard.
Roughness requirements for tooled rods are set based on the client's requests. Unless otherwise requested, the roughness of tooled rods is set at Ra 2.5 maximum, and the roughness of ground rods at Ra 1.25 maximum.
The acceptable deviations in the size of the acceptable deviations in the size of rods of rectangular or other cross-section other than round are established by agreement with consumers.
07
Application areas