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Steel 65S2VA

Description

Steel 65S2VA

Steel 65S2VA: brand of steels and alloys. Below is the systematized information on the purpose, chemical composition, types of supplies, substitutes, temperature of critical points, physical, mechanical, technological and casting properties for the grade — Steel 65S2BA.

General information of steel 65S2VA

Substitute brand
steel: 60S2A, 60S2XA.
Delivery type
Long products, including shaped: GOST 14959−79, GOST 2590−71, GOST 2591−71, GOST 2879−69, GOST 7419.0−78 — GOST 7419.8−78. Calibrated bar GOST 14959−79, GOST 7417−75, GOST 8559−75, GOST 8560−78. Polished bar and silver bar GOST 14959−79, GOST 7419.0−78 — GOST 7419.8−78. Tape GOST 2283−79. Strip GOST 103−76, GOST 4405−75. Wire GOST 14963−78. Forgings and forged billets GOST 14959−79, GOST 1133−71.
Application
responsible and highly loaded springs and springs.

Chemical composition of steel 65S2VA

Chemical element %
Tungsten (W) 0.80−1.20
Silicon (Si) 1.5−2.0
Manganese (Mn) 0.70−1.0
Copper (Cu), no more 0.20
Nickel (Ni), no more 0.25
Sulfur (S), no more 0.025
Carbon (C) 0.61−0.69
Phosphorus (P), no more 0.025
Chromium (Cr), no more 0.30

Mechanical properties of steel 65S2VA

Mechanical properties

Heat treatment, delivery condition σ 0.2, MPa σ B, MPa δ 5 ,% ψ,%
Steel categories: 3.3A, 3B, 3V, 3G, 4.4A, 4B. Hardening 850 ° С, oil, tempering 420 ° С. 1665 1860 five 20

Mechanical properties depending on the tempering temperature

vacation t, ° С σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2
Isothermal quenching with holding at 270 ° C.
  1750 2110 8 38 44
150 1810 2010 nine 38 44
280 1830 1930 eleven 38 51
310 1830 1930 ten 40 53
400 1790 1860 eleven 40 50

Mechanical properties versus test temperature

test t, ° C σ 0.2, MPa σ B, MPa δ 5 ,% ψ,% KCU, J / m 2
Hardening 860 ° C, oil. Vacation 400 ° С
20 1860 2060 8 thirty 28
200 1670 2060 ten 33 24
300 1570 1810 eleven 29  
400 1370 1620 fifteen 60  
-20 1960 2110 8 27 25
-50 2010 2160 8 26 22
Hardening 860 ° C, oil. Vacation 450 ° C.
20 1670 1760 ten 35 26
200 1370 1710 ten thirty 26
300 1270 1570 eleven 21  
400 1180 1370 fifteen 50  
-20 1710 1810 ten 33 24
-50 1760 1860 ten 32 24

Technological properties of steel 65S2VA

Forging temperature
Beginning 1100, end 900.
Weldability
not applicable for welded structures.
Tendency to release ability
not inclined
Flock sensitivity
not sensitive

Physical properties of steel 65S2VA

Test temperature, ° С 20 100 200 300 400 500 600 700 800 900
Normal elastic modulus, E, GPa 211 206 200 195 185 178 154 136 131  
Torsional shear elastic modulus G, GPa 82 80 78 74 70 67 58 51 49  
Density of steel, pn, kg / m 3 7850                  
Thermal conductivity coefficient W / (m ° С) 27 27 28 29 29 29 29 28 28  
Test temperature, ° С 20−100 20−200 20−300 20−400 20−500 20−600 20−700 20−800 20−900 20−1000
Linear expansion coefficient (a, 10−6 1 / ° С) 11.5 12.5 13.0 13.5 13.8 14.3 14.5 13.5    
Specific heat (C, J / (kg ° C)) 475 500 510 530 555 580 615 690    

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