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Steel 45X14H14V2M

X27YU5T CRN70VMTUF CHN78T CRN70VMYUT CHN80TBU CRN35VT CHN70U CRN35VTU CHN77TUR 20X23H18 31Х19Н9МВБТ 40Х13 20Х13 20X25H20C2 40Х15Н7Г7Ф2МС 10X23H18 12Х25Н16Г7АР 15X12VNMF 20Х20Н14С2 37X12H8G8MFB 40X9C2 20X23H13 30Х13 40CR10CR2M 45Х14Н14В2М 13Х11Н2В2МФ

45Cr14N14V2M steel

Steel 45Cr14N14V2M: a classifier of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the brand — Steel 45Cr14N14V2M.

General information on steel 45Cr14N14V2M

Delivery type
Bar stock, including shaped: GOST 5949−75, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated rod GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silversilver GOST 14955−77. Strip GOST 4405−75, GOST 103−76. Forged and forged blanks GOST 1133−71.
Application
Parts of valves and pipelines, motor valves, fasteners for long-term work at temperatures up to 600 ° C and for work with a limited period of up to 650 ° C. Outstandard heat resistant steel.

Chemical composition of steel 45Х14Н14В2М

Chemical element %
Tungsten (W) 2.0−2.8
Silicon (Si), not more 0.8
Manganese (Mn), not more than 0.7
Copper (Cu), not more than 0.30
Molybdenum (Mo) 0.25−0.40
Nickel (Ni) 13.0−15.0
Sulfur (S), max. 0.020
Carbon (C) 0.40−0.50
Phosphorus (P), not more than 0.035
Chrome (Cr) 13.0−15.0

Mechanical properties of steel 45Cr14Ni14V2M

Mechanical properties at elevated temperatures

t test,°C σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2
Rods. Hardened at 1175 °C with water. Aging at 750 °C, 5 h.
20 375 775 37 49 96
500         73
550 255 570 22 32  
600 250 490 16 26 64
650 235 435 13 25 73
700 215 340 11 22 77
750 195 275 9 18 81

Mechanical properties of the bar

Heat treatment, delivery condition Section, mm σ0, 2, MPa σB, MPa δ5, % ψ, %
High tempering 810−830°C, air cooling 60 315 710 20 35

Mechanical properties depending on heat soak and test temperature

Heat treatment, delivery condition t test temperature,°C σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2
Heat soak 550 °C, 1000 °C 20 400 840     78
Heat soak 550 °C, 1000 °C 550 265 560 23    
Heat soak 550 °C, 1000 °C 650 260 540 17    
Heat soak 550 °C, 1000 °C 700 245 410 16    
Heat soak 600 °C, 1000 °C 20 400 800 18 37 59
Heat exposure 600 °C, 1000 °C 550 305 610   28  
Heat soak 600 °C, 1000 °C 600 315 550   19  
Heat soak 600 °C, 1000 °C 700 280 405 16 30  
Heat soak 700 °C, 1000 °C 20 425 810   33 73
Heat soak 700 °C, 1000 °C 600 260 485 20 46  
Heat soak 700 °C, 1000 °C 650 265 465 19 44  
Heat soak 700 °C, 1000 °C 700 255 390 17 39  

Mechanical properties in the long term strength test

Creep strength, MPa Creep rate, %/h t test,°C Ultimate long-term strength, MPa Test duration, h t test, h
176 1/10000 600 176 10000 600
78 1/100000 600 147 100000 600
36 1/10000 700 23 10000 700
16 1/100000 700 274 100 600

Technological properties of steel 45Х14Н14В2М

Forging temperature
Starts at 1160, ends at 850. Sections up to 300 mm are cooled in stacks in the air.
Weldability
Difficult-to-weld. Welding method — RDS. Following heat treatment is recommended to relieve welding stresses.
Machinability
In the hardened condition with NV 229−241 Kυ of dv.spl. = 0.7, Kυ b.st. = 0.25.

Endurance limit of steel 45Х14Н14В2М

σ-1, MPa n Heat treatment, state of steel
323 1Е+7 Notched specimens.
289 1Е+7 Smooth specimens.

Physical properties of steel 45Х14Н14В2М

Test temperature, °С 20 100 200 300 400 500 600 700 800 900
Modulus of normal elasticity, E, GPa 208 196 190 181 173 166 157 149 141  
Steel density, pn, kg/m3 8000   7830   7840   7760   7660  
Thermal conductivity coefficient W/(m — °C) 14 16 17 19 20 21 22 24    
Electrical resistivity (p, nominal value — m) 814 875 945 1000 1055 1098 1142 1172    
Test temperature,°C 20−100 20−200 20−300 20−400 20−500 20−600 20−700 20−800 20−900 20−1000
Coefficient of linear expansion (a, 10−6 1/°C)   17.0   18.0   18.0   19.0    
Specific heat capacity (C, J/(kg -°C))     507 511 523 528