20N2M (20NM)
Ring gears, sprockets, pins and other important parts, working in conditions of shock and alternating loads
Classification
Country | Section | Category |
---|---|---|
CIS, Russia, Ukraine | Structural steel | Alloyed structural steel |
Chemical composition
Standard | Fe, % | Si, % | Mn, % | Cr, % | Cu, % | Ni, % | P, % | C, % | S, % | Mo, % |
---|---|---|---|---|---|---|---|---|---|---|
GOST 4543-71 | 95.81–97.56 | 0.17–0.37 | 0.4–0.7 | < 0.3 | < 0.3 | 1.5–1.9 | < 0.035 | 0.17–0.25 | < 0.035 | 0.2–0.3 |
Information on suppliers
Mechanical properties at 20 °C
Rolling | Standard | Size, mm | Tension | Classifiers | $$\sigma _{U}$$, $$MPa$$ | $$\sigma_{P}$$, $$MPa$$ | $$\epsilon_L$$, % | $$\psi$$, % | $$KCU\cdot 10^{3}$$, $$\frac{J}{m^2}$$ | Treatment |
---|---|---|---|---|---|---|---|---|---|---|
Rod | GOST 4543-71 | 15 | 880 | 685 | 10 | 50 | 780 | Tempering 860 ° C, oil, leave 180 ° C, air |
Analogues
USA |
---|
H46200 |
Standards
Standard | Description |
---|---|
GOST 4543-71 |
Description of chemical elements
Element | Units of measurement | Description |
---|---|---|
Fe | % | Iron |
Si | % | Silicon |
Mn | % | Manganese |
Cr | % | Chrome |
Cu | % | Copper |
Ni | % | Nickel |
P | % | Phosphorus |
C | % | Carbon |
S | % | Sulfur |
Mo | % | Molybdenum |
Description of mechanical properties
Parameter | Units of measurement | Description |
---|---|---|
$$\sigma _{U}$$ | $$MPa$$ | Ultimate tensile strength |
$$\sigma_{P}$$ | $$MPa$$ | Proportionality limit |
$$\epsilon_L$$ | % | Elongation at break (longitudinal) |
$$\psi$$ | % | Reduction in cross section on fracture |
$$KCU\cdot 10^{3}$$ | $$\frac{J}{m^2}$$ | Impact toughness |