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12X18H10T steel

12Cr18Ni10T Steel

12Cr18Ni10T Steel: Handbook 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 brand — 12X18H10T Steel.

General information about 12X18H10T steel

12X18H10T steel grade
steel grades: 08X18H8N2T, 10X14H14N4T, 12X17H9AN4, 08X22H6T, 08X17T, 15X25T, 12X18H9T.
Type of delivery
Tube 12X18N10T, sheet 12X18N10T, wire 12X18N10T, 12X18N10T circle, bars, including shaped: GOST 5949−75, GOST 2590−71, 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 12h18n10t thick GOST 7350−77. Sheet 12 h18n10t thin GOST 5582−75. Tape GOST 4986−79. GOST 18143−72 wire. Forgings and forged blanks GOST 1133−71, GOST 25054−81. Tubes 12х18Н10Т of GOST 9940−81, GOST 9941−81, GOST 14162−79.
Application
Tube 12h18n10t, sheet 12h18n10t, 12h18n10t circle, details operating up to 600 ° C. Welded apparatus and vessels operating in dilute solutions of nitric, acetic, phosphoric acid, alkaline solutions and salts, and other parts operating under pressure at temperatures from -196 to +600 ° C, and in the presence of aggressive media up to +350 ° C. Steel is corrosion-resistant of austenitic class.

Chemical composition of steel 12Х18Н10Т

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) 0.6−0.8
Carbon ©, not more than 0.12
Phosphorus (P), not more 0.035
Chrome (Cr) 17.0−19.0

Mechanical properties of steel 12Х18Н10Т

Heat treatment, delivery condition Section, mm σ0, 2, MPa σB, MPa δ5, % ψ, %
Barrels. Hardened at 1020−1100°C, air, oil or water. 60 196 510 40 55
Grinded bars, machined to the specified strength.     590−830 20  
Bulk coated bars <5   930    
12x18n10t sheets hot-rolled or cold-rolled. Hardened 1000−1080°C, water or air. >4 236 530 38  
12x18n10t sheets hot-rolled or cold-rolled. Hardened 1050−1080°C, water or air. <3,9 205 530 40  
12x18n10t hot- or cold-rolled bulksheets <3,9   880−1080 10  
Forgings. Tempering 1050−1100°C, water or air. <1000 196 510 35 40
Heat-treated wire 1,0−6,0   540−880 20  
Seamless hot-deformed12х18Н10Т pipes without heat treatment. 3,5−32   529 40  

Mechanical properties at elevated temperatures

t test,°C σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2
1050−1100°C hardening, cooling in air.
20 225−315 550−650 46−74 66−80 215−372
500 135−205 390−440 30−42 60−70 196−353
550 135−205 380−450 31−41 61−68 215−353
600 120−205 340−410 28−38 51−74 196−358
650 120−195 270−390 27−37 52−73 245−353
700 120−195 265−360 20−38 40−70 255−353

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 78−98   650

Technological properties of steel 12Х18Н10Т

Forging temperature
Beginning temperature 1200, ending temperature 850. Sections up to 350 mm are cooled in the air.
Weldability
Weldability without restriction. Welding methods: РДС (electrodes ЦТ-26), ЕШС and КТС. Subsequent heat treatment is recommended.
machinability by cutting
In the hardened state at HB 169 and σB = 610 MPa Kυ of resist. = 0,85, K υ b.st. = 0,35.
Floc-sensitivity
not sensitive

Impact toughness of steel 12Х18Н10Т

Impact toughness, KCU, J/cm2

Delivery condition, heat treatment +20 -40 -75
Strip 8X40 mm in the state of delivery. 286 303 319

Endurance limit of steel 12Х18Н10Т

σ-1, MPa n
279 1Е+7

Heat resistance of 12X18N10T steel

Medium Temperature,°C Resistance group or grade
Air 650 2−3
Air 750 4−5

Physical properties of 12Х18Н10Т steel

Test temperature,°C 20 100 200 300 400 500 600 700 800 900
Modulus of normal elasticity, E, GPa 198 194 189 181 174 166 157 147    
Torsional shear modulus of elasticity G, GPa 77 74 71 67 63 59 57 54 49  
Steel density, pn, kg/m3 7900                  
Thermal conductivity coefficient W/(m — °C) 15 16 18 19 21 23 25 27 26  
Electrical resistivity (p, nominal value — m) 725 792 861 920 976 1028 1075 1115    
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) 16.6 17.0 17.2 17.5 17.9 18.2 18.6 18.9 19.3  
Specific heat capacity (C, J/(kg -°C)) 462 496 517 538 550 563 575 596    

Sensitivity to embrittlement of 12X18H10T steel

Temperature, °C Time, h KCU, J/cm2
  Initial condition 274
600 5000 186−206
650 5000 176−196