Tu 11-77 (Ya0.021.057 THAT). Molybdenum rods.
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Scope of application Tu 11−77 (Яе0.021.057 ТУ)
This specification regulates the general requirements for the production of a molybdenum rod. Finished products must meet mechanical requirements, including tensile strength, yield strength, elongation given for specific conditions, diameter tolerance. Chemical analysis, tensile tests and hardness tests must be carried out in accordance with the relevant standards.
Percent composition
Molybdenum brand | Mo | Al + Fe | Ni | Si | Ca + Mg |
MCH | 99,955 | 0.018 | 0.005 | 0.014 | 0.008 |
MK | 99,932 | 0.018 | 0.005 | 0.019 — 0.037 | 0.008 |
MRN | 99,933 | 0.025 | 0.020 | 0.014 | 0.008 |
Diameter, length of bars and delivery condition
Diameter, mm | Tolerance,% | Length, mm, not less than | |
---|---|---|---|
1.0 — 1.9 through 0.1 | ± 2.5 | 1000 | drawn |
2.0 — 2.9 through 0.1 | |||
3.0 — 4.8 through 0.1 | forged | ||
5.0 — 10.5 through 0.5 | ± 3.0 | 500 | |
11.0 — 18.0 through 1.0 | 300 |
Quality requirements
The colors of tarnishing are allowed. On the surface of the wrought iron, oxidation is allowed. The presence of shells, cracks, delaminations, large burrs and strokes is not permissible. Small strokes, burrs, traces of forging or straightening within the tolerance for diameter, as well as single large burrs on MRN rods are allowed. The ends of the rods are evenly trimmed. Minor chips are allowed. The bars are supplied straight. The deflection should not exceed 1% of the measured length.
Delivery, price
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