1.4418, X4CrNiMo16-5-1, S165M - 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 | ||||||||
| <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 | ||||||||
| <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 | ||||||||
| 0.05 | 0.75 | - | - | - | 16.0 | 5.0 | 1.0 | 0.03 | |
| SS | S165M - SS 2387 - SS2387 | ||||||||
| <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.
echanical 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
| Properties | Temperature | |||||||
|---|---|---|---|---|---|---|---|---|
| 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
- 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:
Substitutes, equivalents and other species designations
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