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|
Grade |
Code |
AISI |
High Strength Stainless Steel |
|
1.4418 |
X4CrNiMo16-5-1 |
S165M |
Steel Properties
Material 1.4418 (S165M) is one of the martensitic corrosion resistant chromium-nickel-molybdenum steels with excellent fatigue resistance, high tensile strength, good weldability, high toughness, even maintained after welding, better corrosion properties than most stainless martensitic steels.In our stock standard condition, the steel matrix consists of 80% Martensite, 10% Austenite and 10% Ferrite. This composition allows a low carbon martensitic structure after quenching and tempering.
Chemical Composition (1.4418, S165M)
|
C % |
P % |
Si % |
Mn % |
S % |
Cr % |
Mo % |
Ni % |
N % |
Cu % |
|
0,06 max. |
0,04 max. |
0,70 max. |
1,50 max. |
0,03 max. |
15,00 – 17,00 |
0,80 – 1,50 |
4,00 – 6,00 |
- |
- |
Mechanical Properties
|
Condition |
Rp0.2, Mpa |
Rm, Mpa |
Elongation [%] |
Hardness [HB] |
|
Bar QT900 |
≥ 700 |
900 – 1100 |
≥ 16 |
280 - 340 |
|
Typical |
720 – 850 |
950 – 1050 |
18 |
300 |
Suitable For
1.4418 (S165M) is designed for applications in slightly corrosive environments, where good fatigue resistance, strength and weldability are required. Specific uses are water turbine parts, propeller shafting, shafting, bolts, shear pins, piston rods and equipment for hydro power stations.
Remarks
1.4418 (S165M) is delivered most often after heat improvement – in QT760 and QT900 conditions in the form of round bars.
Specification
1.4418, AISI S165M, X4CrNiMo16-5-1
