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Steel 20Х20Н14С2

Steel 20Х20Н14С2

Steel 20Cr20N14C2: a classifier of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the grade — Steel 20Cr20N14C2.

General information on steel 20X20H14C2

Delivery type
Sheet 20х20Н14с2, bars, including shaped: GOST 5949−75, GOST 2590−71, GOST 2591−71, GOST 2879−69. Calibrated bar GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silver GOST 14955−77. Sheet thin GOST 5582−75, GOST 19903−74, GOST 19904−74. GOST 4405−75, GOST 103−76. forging and forged blanks GOST 1133−71, GOST 25054−81.
Application
Furnace conveyors, boxes for carburizing and other parts of thermal furnaces. Heat-resistant steel of austenitic-ferritic class.

Chemical composition of steel 20Х20Н14С2

Chemical element %
Silicon (Si) 2.0−3.0
Manganese (Mn), not more 1.5
Copper (Cu), not more than 0.30
Nickel (Ni) 12.0−15.0
Sulfur (S), not more than 0.025
Titanium (Ti), not more than 0.2
Carbon ©, not more than 0.20
Phosphorus (P), not more than 0.035
Chrome (Cr) 19.0−22.0

Mechanical properties of steel 20Х20Н14С2

Heat treatment, delivery condition Section, mm σ0.2, MPa σB, MPa δ5, % ψ, %
Rods. Hardening at 1000−1150°C. air or water. 60 295 590 35 55
Hot- or cold-rolled sheets. Hardened 1000−1080°C, air or water. <3,9   590 40  

Mechanical properties at elevated temperatures

t test,°C σ0, 2, MPa σB, MPa δ5, % ψ, %
Tempering 1100 °C, water
20 390 630 33 43
700 110 300 36 44
750 110 265 39 49
800 98 225 41 55
900 39 110 49 60
Heating 1150 °C, water
20 343−392 630 53 73
100 110 305 36 34
750 110 265 35 34
800 98 225 42 41
850 69 155 58 47
900 39 110 74 58
950 29 88 75 55

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
9.8 1/10000 875      
1.4   1000      

Technological properties of steel 20Х20Н14С2

Forging temperature
The beginning 1170, the end 850. Sections up to 350 mm are cooled in the air.

Physical properties of steel 20Х20Н14С2

Test temperature,°C 20 100 200 300 400 500 600 700 800 900
Steel density, pn, kg/m3 7800 7760         7550 7510 7470 7420
Thermal conductivity coefficient W/(m — °C)   15 17 18 19 21 23 24 26 28
Electrical resistivity (p, nominal value — m) 946 1000 1051 1095 1130 1100 1194 1218 1242 1242
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) 16.0         18.1 18.3 18.5 18.8 19.0