1.4418, S165M, Z8CND17.04 - stainless steel

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

Standard	Steel Grade
	Chemical Composition %
	C:	Mn:	Si:	P:	S:	Cr:	Ni:	Mo:	N:
EN	1.4418 - X4CrNiMo16-5-1 - X 4 CrNiMo 16-5-1
EN	<0.6	<1.5	<0.7	<0.04	<0.03	15.0 - 17.0	4.0 - 6.0	0.8 - 1.5	>0.02
AF	Z6CND16-05-01 - Z 6 CND 16-05-01
AF	<0.06	<1.0	<1.0	<0.040	<0.025	15.0 - 17.0	3.5 - 5.5	0.80 - 1.25	-
AIR 9160	Z8CND17.04 - Z 8 CND 17.04 - Z8CND17-04
AIR 9160	0.05	0.75	-	-	-	16.0	5.0	1.0	0.03
SS	S165M - SS 2387 - SS2387
SS	<0.05	<1.5	<1.0	<0.045	<0.030	15.0 - 17.0	4.0 - 6.0	0.8 - 1.5	-

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

Heat-treated condition +QT760 for bars

Tensile strength, R_m: 760 - 960 MPa
The yield point, R_e: > 550 MPa
Elongation, A:> 16%
Impact resistance for dimensions KV_20℃: >70J

Heat-treated condition +QT900 for bars

Tensile strength, R_m: 900 - 1150 MPa
The yield point, R_e: > 700 MPa
Elongation, A:> 10%
Impact resistance for dimensions KV_20℃: >60J

Heat-treated condition +QT840 for bars

Tensile strength, R_m: 840 - 1100 MPa
The yield point, R_e: > 660 MPa
Elongation, A:> 14%
Impact resistance for dimensions KV_20℃: >55J

Other mechanical and physical properties

Modulus of elasticity, E = 200 GPa
Thermal capacity, c_p = 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

Properties		Temperature
Properties		100℃	150℃	200℃	250℃	300℃	350℃	400℃
The yield point, R_p0,2 (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

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:

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

1.4418, X4CrNiMo16-5-1, S165M - stainless steel