65

Substitute: 60, 70.

Springs, springs and other parts that require increased strength and elastic properties, wear resistance; parts operating under friction conditions in the presence of high static and vibration loads.

Classification

Country Section Category
CIS, Russia, Ukraine Structural steel Spring-spring structural steel

Chemical composition

Standard Fe, % Si, % Mn, % Cr, % Cu, % Ni, % P, % C, % S, %
GOST 14959-79 97.36–97.94 0.17–0.37 0.5–0.8 < 0.25 < 0.2 < 0.25 < 0.035 0.62–0.7 < 0.035

Information on suppliers

Physical characteristics

Temperature, °C E\cdot 10^{9}, MPa \alpha\cdot 10^{6}, K^{-1} \varkappa, \frac{W}{m\cdot K} \rho, \frac{kg}{m^3} c\cdot 10^{-3}, \frac{J}{kg\cdot K}
20 2.05 7810
100 11 68 0.483
200 11.6 53
300 12.3
400 13.2 36 0.525
500 13.8 31
600 14.2
700 14.6
800 14.7
900 13.9
1000 14.8

Mechanical properties at 20 °C

Rolling Standard Size, mm Tension Classifiers \sigma _{U}, MPa \sigma_{P}, MPa \psi, % d5, % Treatment
Hire GOST 14959-79 heat-treated 980 785 35 10 Hardening 830oC, oil, Vacation 470oC
The tape is annealed. GOST 2284-79 annealing 440–740 10
The tape is hardcore. GOST 2284-79 cold-work 740–1130

Brinell hardness number

Rolling Standard Classifiers Value, HBW
Hire GOST 14959-79 raw 255
The plates GOST 1577-93 annealing 229

Technological Properties

Weldability Propensity to temper brittleness
Not applicable for welded structures not inclined

Critical point temperatures

Ac1, K Ac3(Acm), K Ar3(Arcm), K Ar1, K Mn, K
727 752 730 696 285

Analogues

Germany USA European Union
C60E 1065 C66D

Standards

Standard Description
GOST 14959-79

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

Description of physical characteristics

Parameter Units of measurement Description
E\cdot 10^{9} MPa Elastic modulus
\alpha\cdot 10^{6} K^{-1} Coefficient of thermal (linear) expansion (range 20°C–T)
\varkappa \frac{W}{m\cdot K} Coefficient of thermal conductivity (the heat capacity of the material)
\rho \frac{kg}{m^3} The density of the material
c\cdot 10^{-3} \frac{J}{kg\cdot K} The specific heat of the material (range 20°C–T)

Description of mechanical properties

Parameter Units of measurement Description
d5 % Elongation at break
\sigma _{U} MPa Ultimate tensile strength
\sigma_{P} MPa Proportionality limit
\psi % Reduction in cross section on fracture

Designation of types of weldability

Parameter Units of measurement Description
no limits Welding is performed without heating and without subsequent heat treatment
Boundedly welded Welding is possible with heating up to 100–120 °C and subsequent heat treatment
Difficult to weld For obtaining quality welded joints, additional operations are required: heating up to 200–300 °C for welding, heat treatment after welding — annealing
Not applicable for welded structures

Description of temperatures of critical points

Parameter Units of measurement Description
Ac1 K
Ac3(Acm) K
Ar3(Arcm) K
Ar1 K
Mn K