Low carbon martensitic stainless steel 1.4418, X4CrNiMo16-5-1, Z8CND17.04, S165M according to EN 10088-1, AIR 9160.

 

StandardSteel Grade
Chemical Composition %
C:Mn:Si:P:S:Cr:Ni:Mo:N:
EN1.4418 - X4CrNiMo16-5-1 - X 4 CrNiMo 16-5-1
<0.6<1.5<0.7<0.04<0.0315.0 - 17.04.0 - 6.00.8 - 1.5>0.02
AFZ6CND16-05-01 - Z 6 CND 16-05-01
<0.06<1.0<1.0<0.040<0.02515.0 - 17.03.5 - 5.50.80 - 1.25-
AIR 9160Z8CND17.04 - Z 8 CND 17.04 - Z8CND17-04
0.050.75---16.05.01.00.03
SSS165M - SS 2387 - SS2387
<0.05<1.5<1.0<0.045<0.03015.0 - 17.04.0 - 6.00.8 - 1.5-

 

1.4418, X4CrNiMo16-5-1 - Specifications and application

X4CrNiMo16-5-1 is one of the better martensitic grades, showing sufficient corrosion resistance, good strength properties and high hardness with reduced carbon content.

The steel has very good strength and corrosion resistance of welded joints, resistance to fatigue, very good parameters in low temperature environments, and corrosion resistance comparable to austenitic steels 18-8. In addition, it is characterized by good weldability.

The grade can be used when working in low concentrations at room temperatures and typically in contact with - acetic acid, citric acid, salt solutions, pyrogallic acid, tannin, stearic acid and and some nitrates and sulfur compounds.

The material supplied mainly in the form of bars is used for the production of valves, turbine subassemblies, nuts and bolts, shafts, pins, pistons, spindles, crankshafts, agitators in the chemical, energy, marine, shipbuilding, aviation/cryogenic industries.


Mechanical and physical properties of 1.4418, X4CrNiMo16-5-1

Annealed condition +A

  • for dimensions > 16mm
    • Tensile strength, Rm: <1100 MPa
    • Hardness, HB: <320
  • for dimensions > 16mm
    • Tensile strength, Rm: <1150 MPa
    • Hardness, HB: <380

 

Heat-treated condition +QT760 for bars

  • Tensile strength, Rm: 760 - 960 MPa
  • The yield point, Re: > 550 MPa
  • Elongation, A:> 16%
  • Impact resistance for dimensions KV20℃: >70J

 

Heat-treated condition +QT900 for bars

  • Tensile strength, Rm: 900 - 1150 MPa
  • The yield point, Re: > 700 MPa
  • Elongation, A:> 10%
  • Impact resistance for dimensions KV20℃: >60J

 

Heat-treated condition +QT840 for bars

  • Tensile strength, Rm: 840 - 1100 MPa
  • The yield point, Re: > 660 MPa
  • Elongation, A:> 14%
  • Impact resistance for dimensions KV20℃: >55J

 

Other mechanical and physical properties

  • Modulus of elasticity, E = 200 GPa
  • Thermal capacity, cp = 430 J * kg-1 * K-1
  • Thermal conductivity, λ = 15 W * m-1 * K-1
  • Specific resistance, Ω: 0,8 mkOhm * m

 


Mechanical properties at elevated temperatures

PropertiesTemperature
100℃150℃200℃250℃300℃350℃400℃
The yield point, Rp0,2 (MPa)+QT760>520>510>500>490>480--
+QT900>660>640>620>600>580--
+QT840>660>640>620>600>580--
Modulus of elasticity, E (GPa)195-185-175-170
Linear expansion coefficient, α (* 10-6 K-1)10,3-10,8-11,2-11,6

 


Heat and plastic treatment of 1.4418, X4CrNiMo16-5-1

  • Delivery condition + A- Annealing at a temperature of 600 - 650 ℃ with cooling in air or with a furnace
  • Delivery condition +QT760- Hardening at 950 - 1050 ℃ with cooling in oil or air, tempering at 590 - 620 ℃
  • Delivery condition +QT900- Hardening at 950 - 1050 ℃ with cooling in oil or air, tempering at 550 - 620 ℃
  • Delivery condition +QT840- Hardening at 900 - 1000 ℃ with cooling in oil or air, tempering in the range of 570 - 650 ℃

 


In the above-mentioned grades we deliver:

 


Other replacements and equivalents of 1.4418:

1.4418, X4CrNiMo16-5-1, X 4 CrNiMo 16-5-1, 4418, Z6CND16-05-01, Z 6 CND 16-05-01, FE-PM3504, Z8CND17-04, Z 8 CND 17-04, Z8CND17.04, Z 8 CND 17.04, X164M, BMS H-10, S165M, SS2387, SS 2387, 248SV, 08Х17Н5М3, Х17Н5М3, 08Ch17N5M3, Ch17N5M3, 08Kh17N5M3, Kh17N5M3, H17N5M3, 08H17N5M3


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