GOST 17432-72. Materials powder. Bars and forgings of alloy grade M-MP. Specifications.
1.1. Hot rods are made with a diameter of 14.5 mm to 40 mm, forged from 30 to 60 mm forging with diameter or side of the rectangle from 30 to 300 mm.
At customer’s request, produce forgings with machined surface.
|Product||Diameter, side of a rectangle plate, cylinder height, mm||Pred. deflection, mm gRoaccutane or forged bars and forgings||Pred. deflection, mm peeled bars and cylinders|
|Bars and rods, hot-rolled||14,5; 17,0; 20,0; 24,0||±1,0|
|30,0; 35,0; 40,0||±2,0||To 2.0|
|Molybdenum rods, forged||30−60||+5||20|
|Forgings (cylinders, parallelepipeds, plates)||30−100
1.2. The bars are made of random length hot rolled from 150 to 1500 mm, forged from 100 to 300 mm.
In coordination with the consumer bars are made of standard length within off-gage. Tolerances for length shall not exceed for hot-rolled bars of 30 mm, and forged to +15 mm.
1.3. The dimensions of the forgings according to the diameter or side of the rectangle are set with an interval of 5 mm to 100 mm and with an interval of 10 mm over 100 mm.
1.4. Ovality should not exceed the limit deviation for diameter.
1.5. The curvature of the hot rolled bars shall not exceed 1 mm per 100 mm length.
2. TECHNICAL REQUIREMENTS
2.1. The molybdenum powder should have the following chemical composition, %, max: iron — 0,014; aluminum — 0,005; Nickel — 0,005; silicon — 0,005; magnesium 0,003; sodium — 0,015; potassium — 0,05; calcium 0,007; tungsten — 0.4; oxygen and moisture is 0.3; molybdenum — the rest.
The particle size of the powder should not be more than 0.005 mm for 92% of powder by weight.
2.2. Forgings in accordance with the order made in the annealed or without annealing with a surface cleansed of oxides or machined.
2.3. The surface should be no cracks, sunsets, sekulow and captured.
2.4. On the surface of the machined bars and forgings defects are not allowed, except for certain minor defects in depth not more than half of the maximum deviations on the size of the section counting from the actual.
|Product||Diameter, mm||Tensile strength σB, N/mm2 (kgf/mm2)||Relative elongation δ5, %|
|not less than|
|Hot rolled molybdenum bars||14,5−24,0||640 (65)||20|
|30,0; 35,0; 40,0||590 (60)||15|
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