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Steel 08Cr18H8H2T

08Cr18H8Ni2T Steel

Steel 08Cr18G8H2T: steel and alloys classifier. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the brand - Steel 08Cr18G8H2N2T.

General information about 08Cr18H8N2T steel

Grade substitute
steel 12Х18Н9Т.
Delivery type
GOST 7350−77 thick plate. Forged and forged blanks GOST 25054−81.
Application
For manufacturing of welded equipment operating in oxidizing environments at operating temperatures from -50 to 300 °C. Corrosion-resistant steel of austenitic-ferritic class.

Chemical composition of steel 08Х18Г8Н2Т

Chemical element %
Silicon (Si), not more 0.8
Manganese (Mn) 7.0−9.0
Copper (Cu), not more than 0.30
Nickel (Ni) 1.8−2.8
Sulfur (S), not more than 0.025
Titanium (Ti) 0.20−0.50
Carbon ©, not more than 0.08
Phosphorus (P), not more 0.035
Chrome (Cr) 17.0−19.0

Mechanical properties of 08Cr18H8Ni2Ti steel

Mechanical properties at elevated temperatures

t test,°C σ0, 2, MPa σB, MPa δ5, % ψ, %
Tempering at 1000 °C, water.
800 80 90 45 65
900 40 50 45 70
1000 15 20 60 80
1100 5 10 70 85
1200     80 90

Mechanical properties of sheets

Heat treatment, delivery condition Section, mm σ0, 2, MPa σB, MPa δ5, % KCU, J/m2
980−1020°C hardened, water (transverse samples) >4 343 588 50 59

Mechanical properties depending on degree of plastic deformation

Heat treatment, delivery condition σ0, 2, MPa σB, MPa δ5, %
Quenching at 1000 °C, water.
Degree of deformation - 0% 390 650 22
Strain rate - 5% 660 780 19
Degree of deformation - 10% 700 820 16
Degree of deformation - 30% 780 880 6
Degree of deformation - 50% 1080 1100 3

Mechanical properties as a function of temperature and aging time

t test,°C σ0, 2, MPa σB, MPa δ5, % ψ, % HB
Tempering at 1000 °C, Aging time 1 h
300 415 820 32 50  
400 410 800 31 50  
500 390 790 32 52  
600 380 780 28 57  
700 390 780 28 57  
Tempering at 1000 °C, Aging time 100 h
300 410 810 32 49 200−210
400 450 850 27 48 240−260
500 410 760 29 48 230−240
600 370 780 24 38 285−325
700 510 810 10 12 325

Technological properties of 08Cr18H8H2T steel

Forging temperature
Beginning 1150, end 810.
Weldability
without restriction. The steel is well welded by RDS and ADS. For manual welding we recommend electrodes CL-11 (Sv-08X19N10B). For automatic welding wire of 08X19H10B or 08X20H9G7T steel in combination with flux AN-26 is used.

Impact toughness of 08X18H8H2T steel

Impact toughness, KCU, J/cm2

Delivery condition, heat treatment +20 -20 -40 -50 -60
Hardening 980−1020 C. 176 167 150 111 71

Corrosion properties of 08Cr18H8H2T steel

Medium Test temperature,°C Depth, mm/year
58% HNO3 solution 80 0,154

Physical properties of 08Cr18H8H2T steel

Test temperature,°C 20 100 200 300 400 500 600 700 800 900
Modulus of normal elasticity, E, GPa 212 203 195 184 177 164 167 146 161  
Steel density, pn, kg/m3 7700                  
Thermal conductivity coefficient W/(m - °C) 21                  
Electrical resistivity (p, nominal value - m) 710                  
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) 12.3 13.1 14.4 14.4 15.3 16.6 16 16.4 17.2  
Specific heat capacity (C, J/(kg -°C)) 462