That 48-19-203-85. Rods made of molybdenum cermet, and vacuum melting, neutorgena. Specifications.
1. Technical requirements
1.1. Bars and wire made of molybdenum cermet, and vacuum melting, unannealed shall conform to the requirements of this specification.
Rods and wires made from powder billets of molybdenum stamps MCH and vakuumpumpen brand MCWP ingots obtained by melting powder blanks of molybdenum stamps MCH.
1.3.Dimensions and limit deviations from the nominal diameter.
|Diameter, mm||Limit. deviations||Length, mm, not less|
|0.40 to 0.80 in 0.1||± 0,02||18000|
|0.90 to 1.20 in 0.1||± 0,03||18000|
|from 1.30 to 1.5 in 0.1||± 0,04||14000|
|from 1.60 to 1.90 in 0.1||± 0,04||7000|
|Of 2.00||± 0,05||7000|
|Of 3.00||± 0,05||4000|
|from 3.00 to 6.00 in 0.5||± 0,10||1000|
|from 7.00 to 10.00 using the 1.0||± 0,15||500|
|from 11.00 to 15.00 using 1,0||± 0,20||300|
1. Molybdenum wire is supplied in coils.
2. According to customer’s requirement wire diameter from 2.0 to 3.0 mm inclusive can be supplied in the form of segments with length less than 1000 mm.
1.4. The chemical composition shall conform to the following requirements.
|Impurities||Mark MCH||Brand MCWP|
|calcium and magnesium (in total)||0,0050||0,005|
|Mass fraction of molybdenum||basis||basis|
1.6. The surface must be free of cracks. On the surface traces of forging, risks, films, shells, if it does not take dimensions of bars for the limits of permissible deviations, a symptom of rejection are not.
On the surface of the wire drag marks, longitudinal strokes, burrs, color tint and the presence of a lubricant to the acceptance a symptom of are not.
1.7. The ends of the wire and rods with diameter up to 4.0 mm inclusive, must be chopped off, and the ends of bars with diameter more than 4.0 mm needs to be sharpened.
1.8. The rod should be straight. Deviations from straightness must not exceed 0.2% in the 200 mm long rod.
1.9. Mechanical properties of rods and wire made of molybdenum stamps MCH complies with the following requirements.
|Nominal diameter, mm||The limit of the tensile strength, MPa (kg/mm2), not less||Elongation, %, not less|
|from 0.50 to 1.25||1176 (120)||1,5|
|from 1.30 to 3.00||686 (70)||6,0|
|from 3.5 to 5.00||588 (60)||17,0|
|Of 13.00 (out of shtabikov 25x25 or 32x32)||539 (55)||8,0|
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