92. Applying material designations on work detail drawings.

On the working drawings of the parts put the necessary data characterizing the properties of the material of the finished part and the material from which the part should be made.

In the main inscription of the drawing, the details indicate the type, name and brand of the material in accordance with the standard or other regulatory documents.

Carbon steel of ordinary quality means: St, St. 1, Art. 2, Art. 3, Art. 4, Art. 5, Art. 6. In column 3 of the main inscription write, for example: Art. 3 GOST 380—88.

The designation of carbon quality structural steel includes two-digit numbers showing the carbon content in hundredths of a percent: 0.5 kp (boiling), 0.8 kp, 0.8.10 kp, 10.15 kp, 15, 201 20.26, 30,35,40, etc. In the title block, record, for example: "Steel U25 GOST 1050-88".

Carbon tool steel is denoted by the letter "Y" indicating the carbon content, for example, U8 GOST 1435-90.

Alloyed machine-building steels have the designations of alloying elements: G — manganese, C — silicon, X — chrome, H — nickel, M — molybenum, etc., and the percentage of these elements, for example, nickel-chromium nickel steel of grade 20 XH: “Steel 20ХН GOST 4543 —71 ”

Gray cast iron (MF) in its designation contains the ultimate tensile strength (the first two digits), the flexural strength (the second two digits), for example: "MF 18-36 GOST 1412-85".

Ductile cast iron (QC) in its designation contains the ultimate tensile strength (the first two digits) and the elongation in percent (the second two digits), for example: "QCH35-10 GOST 1215-79".

Copper (M) is produced in grades MO, Ml, M2, MZ, M4. In the title block write, for example: "M4 GOST 859-78".

Brass is a copper-zinc alloy, processed by pressure, manufactured by the grades L96, L90, L70, L ^A N. The main inscription is recorded, for example: "L70 GOST 15527-70".

Brass - a copper-zinc alloy foundry produce grades LA67-2.5; LAZHMZ 66-6-3-2; LMTS 58-1N; ЛК80-ЗЛ and others. The first two digits indicate the percentage of copper, and the rest - the percentage of components (aluminum A, iron — F, manganese — Mc, etc.). In the title block write, for example: "LAZhMts 66-6-3-2 GOST 17711-80".

Tin foundry bronzes make brands Br. OTSSN 3-7-5-1; Br. OCC 3-12-5; Br. OCC 5-5-5, etc. The figures indicate the percentage of components (tin - O, zinc - C, lead - Sit.), The rest is copper. Example conditional notation: “Br. OCC 5-5-5 GOST 613-79 ".

Tinless special bronze are brands of Br. 45, Br. A7, Br AJN 10-44, Br. Mc 5 and others. Example of designation: “Br. Mc 5 GOST 18175-78 ".

Aluminum alloys AL, AK, D1, D6, D7 are recorded in the title block by type: “AL 4 GOST 2685-75; AK 2 GOST 4784-74; D6 GOST 13722—68 ".

All metals have a single conventional graphic designation (shading) on ​​images in sections and sections (see GOST 2.306-68). If a part is made of a gauge material (sheet, rod, wire, profile, etc.), then it denotes not only the material, but also the gauge with its dimensions and the number of the standard for this gauge, for example:

GOST2590-88

------------------------ a circle;

Article 3GOST535-88

25G OST 8560267

----------------------- hexagon.

GOST1051-73

Of the widely used non-metallic materials, the following can be distinguished:

technical sheet rubber according to GOST 7338—90;

paronite according to GOST 481-80;

sheet viniplast according to GOST 9639-71;

textolite constructional;

getinaks according to GOST 2718-74;

polyethylene according to GOST 16338-85;

fluoroplastic according to GOST 14906-77.

The conventions and brands of these materials are determined by their standards. All of the listed non-metallic materials have a single conventional graphic image on the drawings (check-in "in a cage").