Marking of alloy steels

Code letter

The designation of alloyed steel in Russia consists of a combination of letters and numbers that reflect its percentage composition. Alloying elements have the following notation: Ni (N), Cr (X) Mn (G), Mo (M), Si ©, W (V), Ti (T), Ta (TT), V (f), Al (u), Cu (L), B ®, Co (K), Nb (B), Zr ©, Se (E), rare earth metals (H).

Numerical marking ,

The number after the letter indicates the percentage of the alloying element B. If the number is not specified, the alloying additive is not more than 0.8% and 1.5%. With the exception of molybdenum and vanadium (which in steels is usually to 0.2−0.3%). In addition, the boron (in the alloy with the letter P must be 0.01%). In high quality structural alloy steels the first two digits represent the carbon content in hundredths of a percent.

Example: 03KH16N15M3B — high alloy steel, which contains 0,03% C, 16% Cr, 15% Ni, 3% Mo and 1% Nb. A number of special steels have their own special designation: Steel ball marked with the letters (SH), after which specify the content of chromium in tenths of a percent; a Complex alloy tool steel are identified by the letter ®, the following number reflects the content of tungsten as a percentage; Freecutting steel are marked with a letter (A), and the number reflects the carbon content in hundredths of a percent.

To buy, price

In stock, LLC «Electrocentury-steel» a wide range of high-quality metal standard and custom sizes. Supply products made of alloys in retail and wholesale. All production is certificated on conformity to requirements of standards and technical conditions. In the certificate marked by the manufacturer, drawing number and name of the product alloy grade, number of melt, parts, chemical composition, mechanical properties, and results of additional tests. Implementation of orders in the shortest possible time. Wholesale buyers are offered preferential discounts.

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