That 11-77 (Яе0.021.057 TU). Bars molybdenum.
1. Technical requirements
1.1. Molybdenum rods shall conform to the requirements of this specification.
1.2. Chemical composition
|The grade of molybdenum||The molybdenum content, %,||The content of impurities %, Al + Fe||Ni||Si||Ca + Mg|
|MK||99,932||0,018||0,005||0,019 — 0,037||0,008|
1.3.Diameter, the minimum bar length and condition of the delivery must meet the following requirements.
|Diameter, mm||Pred. deviation of diameter, %
||Length, mm, not less|
|1,0 — 1,9 in 0.1||± 2,5||1000||drawn|
|A 2.0 — to 2.9 in 0.1|
|The 3.0 — 4.8 V, every 0.1||forged|
|5,0 — 10,5 0.5||± 3,0||500|
|11,0 — 18,0 1,0 through||300|
1.4. The color of the drawn bar should be from black to dark gray. Allowed color of a tint. On the surface of wrought iron bars allowed the oxidation.
1.5. Bars must be free of holes, cracks, delaminations, large burrs and strokes. Allowed small touches, burrs, traces of forging or straightening within tolerance on diameter, and a single large burrs on the bars brand MRN.
1.6. The ends of bars should be trimmed evenly. Slight chipped.
1.7. The rods are supplied straight. Deflection shall not exceed 1% of the measured length of the rod.
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