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Characteristics for grade     20KH23N18   ( 20Х23Н18 )

      Grade :   20KH23N18   ( 20Х23Н18 ) (   Х23Н18     ЭИ417   )
      Substitute:   20Х23Н13, 15Х25Т
      Classification :   High alloy high-temperature steel
      Equivalent grades:   Go here



Chemical composition in % for grade   20KH23N18   ( 20Х23Н18 )
C Si Mn Ni S P Cr
max   0.2max   1max   217 - 20max   0.02max   0.03522 - 25


Mechanical properties under Т=20oС for grade   20KH23N18   ( 20Х23Н18 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
Pipe Ø 212 x 60 longitudinal 500 200 35 50 Guenching 1100 - 1150oC, air,
Bar, GOST 5949-75   longitudinal 490 196 35 50 Guenching 1100 - 1150oC, air,
Sheet trick, GOST 7350-77     540 265 35   Guenching 1030 - 1130oC,Cooling water,
Sheet thin, GOST 5582-75     510 245 35   Guenching 1080 - 1150oC,Cooling water,
Sheet thin, GOST 4986-79     570   19-38  Guenching 1050 - 1080oC,Cooling air,


Technological properties for grade   20KH23N18   ( 20Х23Н18 )
  Weldability: limited weldability.


Physical properties for grade   20KH23N18   ( 20Х23Н18 )
T E 10- 5 a 10 6 l r C R 10 9
Grade MPa 1/Grade Watt/(m·Grade) kg/m3 J/(kg·Grade) Ohm·m
20 2.04   13.8 7900   1000
100   14.9 15.9   538  
200   15.7        
300 1.86 16.6 18.8      
400 1.8 17.3   7760    
500 1.73 17.5   7720    
600 1.63 17.85 21.7 7670    
700 1.53 17.85   7620    
800 1.44          
900       7540    
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     20KH23N18   ( 20Х23Н18 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalySpainChinaSwedenBulgariaHungaryPolandRomaniaCzechiaAustraliaSouth Korea
-DIN,WNrJIS AFNORBSEN UNIUNEGBSSBDSMSZPNSTASCSNASKS
310
310S
314
S31000
S31008
S31400
1.4845
CrNi25-20
X12CrNi25-21
X15CrNiSi25-20
X16CrNi25-20
X8CrNi25-21
X8CrNiSi25-21
SUH310
SUS310
SUS310S
Z12CN25-20
Z12CN26-21
Z8CN25-20
310S16
310S24
310S25
310S31
X8CrNi25-21
1.4843
1.4845
X8CrNi25-21
X22CrNi25-20
X6CrNi25-20
X6CrNi25-21
X6CrNi25-21KG
F.331
X8CrNi25-21
1Cr25Ni20Si2
2361
7RE10AE
8RE10R
Ch23N18
H9
G205
H23N18
H25N20S2
12NiCr250
17255
310S
STS310S


Assortment for grade   20KH23N18   ( 20Х23Н18 )
В22 - Graded and shaped rolling
  GOST   1133 - 71 Forged round and square steel
  GOST   2590 - 2006 Steel hot-rolled round bars
  GOST   2591 - 2006 Steel hot-rolled square bars
  GOST   2879 - 2006 Hot-rolled hexagonal steel
B23 - Sheets and Strips
  GOST   103 - 2006 Hot-rolled steel strip
  GOST   19903 - 74 Hot-rolled steel sheets
  GOST   19904 - 90 Cold-rolled steel sheets
В32 - Graded and shaped rolling
  GOST   7417 - 75 Calibrated round steel
  GOST   5949 - 75 Sorted and gauged corrosion-resistant, heat-resistant and high-temperature steel
  GOST   8559 - 75 Calibrated square steel
B33 - Sheets and Strips
  GOST   5582 - 75 Corrosion-resistant, heat-resistant and higt-temperature sheet steel
  GOST   7350 - 77 Steel thick sheet, corrosionresistant, heat-resistant
  GOST   4405 - 75 Hot-rolled and wrought tool steel strips
B34 - Ribbons
  GOST   4986 - 79 Cold-rolled strips of corrosion-resistant and heat-resistant steel


Specification :
Mechanical properties :
sв - Tensile strength , [MPa]
sT - Yield stress, [MPa]
d5 - Specific elongation at fracture , [ % ]
y - Reduction of area , [ % ]
KCU - Impact strength , [ kJ / m2]
HB - Brinell hardness , [MPa]

Physical properties :
T - Test temperature , [Grade]
E - Young modulus , [MPa]
a - Coefficient of linear expansion (range 20o - T ) , [1/Grade]
l - Termal (heat) condition coefficient , [Watt/(m·Grade)]
r - Density , [kg/m3]
C - Specific heat ( range 20o - T ), [J/(kg·Grade)]
R - Electrical resistance , [Ohm·m]

Weldability :
without limitations - welding is done without heating and subsequent heat treeting
limited weldability - welding is possible under heating up to 100-120 grade and subsequent heat treeting
hard weldability - obtaining the quality welding needs the additional operations:heating up to 200-300 grade; the heat treeting ia annealing

  20KH23N18   ( 20Х23Н18 ) - High alloy high-temperature steel: chemical composition, mechanical and physical properties, hardness
Database of steels and alloys (Marochnik) contains information about chemical composition and properties more then 3000 steels and alloys

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