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Characteristics for grade     R18   ( Р18 )



      Grade :     R18   ( Р18 )
      Substitute:   Р12
      Classification :   High speed tool steel
      Equivalent grades:   Go here



Chemical composition in % for grade   R18   ( Р18 )
C Si Mn Ni S P Cr Mo W V Co Cu
0.73 - 0.830.2 - 0.50.2 - 0.5max   0.6max   0.03max   0.033.8 - 4.4max   117 - 18.51 - 1.4max   0.5max   0.25


Temperature of critical points for grade   R18   ( Р18 ).
Ac1 = 820 ,      Ac3(Acm) = 860 ,       Ar3(Arcm) = 770 ,       Ar1 = 725


Mechanical properties under Т=20oС for grade   R18   ( Р18 )
Assortment Dimension Direct. sв sT d5 y KCU Heat treatment
- mm - MPa MPa % % kJ / m2 -
      840 510 8 10190As-delivered state


    Brinell hardness for     R18   ( Р18 )   (annealing) ,       GOST 19265-73 HB 10 -1 = 255   MPa


Technological properties for grade   R18   ( Р18 )
  Weldability: without limitations.


Physical properties for grade   R18   ( Р18 )
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 2.28     8800   419
100 2.23   26     472
200 2.19   27     544
300 2.1   28     627
400 2.01   29     718
500 1.92   28     815
600 1.81   27     922
700     27     1037
800           1152
900           1173
T E 10- 5 a 10 6 l r C R 10 9


Equivalent steels for grade     R18   ( Р18 )
Warning! Indicated both exact and nearest equivalents.
USAGermanyJapanFranceEnglandEuropeanItalySpainChinaSwedenBulgariaHungaryPolandRomaniaCzechiaAustriaSouth Korea
-DIN,WNrJIS AFNORBSEN UNIUNEGBSSBDSMSZPNSTASCSNONORMKS
T1
T12001
1.3355
HS18-0-1
S18-0-1
X75WCrV18-4-1
SKH2
18-04-01
HS18-0-1
Z80WCV
Z80WCV18-04-01
3355
BT1
1.3355
HS18-0-1
HSv18-0-1
X75WCrV18-4-1
HS18-0-1
X75WCrV18
18-0-1
ET1
HS18-0-1
W18Cr4V
2750
HS18-0-1
R18
R3
SW18
Rp3
19824
BOHLERS200
S200
SKH2



Types of delivery of grade   R18   ( Р18 )
В22 - Graded and shaped rolling
В32 - Graded and shaped rolling
B33 - Sheets and Strips


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

  R18   ( Р18 ) - High speed tool 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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