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08Cr18Ni10T steel

08Cr18Ni10T Steel

08Cr18Ni10T steel: 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 08Cr18Ni10T.

General information on 08Cr18Ni10T steel

Type of delivery
Tube 08Х18Н10Т, round 08Х18Н10Т, sheet 08Х18Н10Т, section rolled, 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, GOST 18907−73. Sheet thick GOST 7350−77, GOST 19903−74, GOST 19904−74. Thin sheet GOST 5582−75. Tape GOST 4986−79. Stripe GOST 4405−75, GOST 103−76. Forgings and forged blanks GOST 1133−71, GOST 25054−81. Tubes GOST 9940−81, GOST 9941−81, GOST 11068−81, GOST 10498−82, GOST 14162−79.
Application
Welded equipment operating in aggressive environments (nitric and acetic acid solutions, alkali and salt solutions), heat exchangers, muffles, pipes, parts of furnace fixtures, electrodes of spark plugs. The steel is corrosion-resistant and heat-resistant of austenitic class.

Chemical composition of 08Cr18Ni10Ti steel

Chemical element %
Silicon (Si), not more 0.8
Manganese (Mn), not more than 2.0
Copper (Cu), not more than 0.30
Nickel (Ni) 9.0−11.0
Sulfur (S), not more than 0.020
Titanium (Ti) 0.4−0.7
Carbon ©, not more than 0.08
Phosphorus (P), not more 0.035
Chrome (Cr) 17.0−19.0

Mechanical properties of 08Cr18Ni10Ti steel

Heat treatment, delivery condition Section, mm σ0, 2, MPa σB, MPa δ5, % ψ, %
Rods. Hardened at 1020−1100°C, air, oil and water quenching. 60 196 490 40 55
Grinded bars, machined to the specified strength 1−30   590−830 20  
Hot- or cold-rolled sheets. Hardened 1000−1080°C, water or air. >4 206 509 43  
Hot- or cold-rolled sheets. Hardened 1050−1080°C, water or air. <3,9   520 40  
Forgings. Hardened 1050−1100°C, water or air. 1000 196 490 35 40
Seamless hot-deformed pipes without heat treatment 3,5−32   510 40  

Mechanical properties at elevated temperatures

t test,°C σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2
20 275 610 41 63 245
300 200 450 31 65  
400 175 440 31 65 313
500 175 440 29 65 363
600 175 390 25 61 353
700 160 270 26 59 333

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
74 1/100000 600 147 10000 600
29−39   650 108 100000 600
      78−98 10000 650

Technological properties of 08Cr18Ni10T steel

Forging temperature
The beginning 1220, the end 900. Sections up to 300 mm are cooled in the air.
Weldability
Welding methods: РДС, АДС under a flux and gas protection, АДС, КТС and ESH.

Impact toughness of 08Cr18Ni10T steel

Impact toughness, KCU, J/cm2

Delivery condition, heat treatment +20 +20 (KCV) -25 -25 (KCV)
Bar cross section of 12 mm. Hardened 1050 C, water.   216   181
Rod with a cross section of 12 mm. Hardened 1050 C, water. 167   147  

Physical properties of 08Cr18Ni10T steel

Test temperature,°C 20 100 200 300 400 500 600 700 800 900
Modulus of normal elasticity, E, GPa 196                  
Steel density, pn, kg/m3 7900                  
Thermal conductivity coefficient W/(m — °C)   16 18 19            
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) 16.1   17.4   18.2   19.1