Molybdenum Sheets, Plates

1. Mo-PM alloy sheets

Dimensions, mechanical and structural characteristics, surface quality

Mo-PM rolled products are made:

• - with finishing by pressure shaping: hot-rolled (HR) with a thickness of 1-45 mm and cold-rolled (CR) with a thickness of 0.3 (0.2)-0.9 mm;

• - based on the degree of rolling accuracy: products of normal and enhanced accuracy;

• - based on materials used, hot-rolled sheets – annealed or without annealing with a surface cleansed of oxides, based on the client's order;

• - in moderate dimensions with scissor-trimmed edges, or a plate with a mechanically milled or grinded surface with a thickness of more than 5 mm;

• - with monitoring of the surface condition, mechanical properties and microstructure.

- 5 – for sheets with a thickness of > 0.2 to 0.5 mm;

- 8 – for sheets with a thickness of > 0.5 to 0.7 mm, inclusive.

** Mechanical properties of sheets (plates) with a thickness of more than 6 mm are determined at the client's request.

Norms are set based on agreement with the client.

Non-flatness:

• - of sheets with a thickness of 1-3 mm does not exceed 2 mm per 100 mm of length;
• - of sheets with a thickness of over 3 mm does not exceed 1 mm per 100 mm of length.
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Surface condition:

rolled stock is delivered without cracks, slivers, backfins, rolled-in foreign particles, blemishes, or edge lamination.

Annealing to remove internal stress:

hot-rolled sheets are manufactured with annealing to remove internal stress, or without annealing (based on the client's order) with a surface cleansed of oxides.

Mo99,95-PM rolled stock is produced:

• - based on finishing by pressure treatment – hot-rolled and cold-rolled;

• - based on the condition of the material – thermally treated, with annealment to remove internal stress, unless the client makes other requests;

• - based on the client's request – with an untreated surface following rolling, or with a mechanically or chemically cleansed surface, or with a surface treated mechanically with milling or grinding;

• - based on the condition of the edges – with trimmed edges and ends or, at the client's request, with mechanically treated edges and ends.

• - < 4% for thicknesses from 0.3 to 4.75 mm;
• - < 5% for thicknesses from 4.75 to 12.7 mm;
• - < 8%  for thicknesses from 12,7 mm non machining plates.

*property norms are established for materials after annealment in a protective atmosphere at a temperature of 900 ^оС during a 30 minute period

**parameters are determined using samples transverse to the direction of the rolling

Thin sheets with a thickness of less than 1 mm should withstand a bending test to an ordered angle of at least 90^о.

Sample values for mechanical properties of molybdenum rolling stock

Microstructure

The manufacturer monitors the microstructure of rolled sheets. In thin sheets (less than 4.75 mm), no full recrystallization structure is permitted, unless otherwise requested by the client.

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.

High-quality raw materials – molybdenum powder with a purity of Mo 99.95-99.98% - are used to make the sintered semifinished products from which sheets are produced.

* Content of the base metal, not including gas-forming elements.

** Σ Ме - total metallic impurities.