By using 1.4418 (165M – SS2387) you get a high tensile strength stainless steel with good weldability. It is designed for use in slightly corrosive environments. Some typical application areas are water turbine parts, propeller shafting, shafting, piston rods and equipment for hydro power stations.
CHEMICAL COMPOSITION
| WEIGHT% | C | SI | MN | S | P | CR | NI | MO | N |
| MIN. | 0,30 | 0,60 | 0,005 | 15,00 | 4,00 | 0,80 | ≥ 0,020 | ||
| MAX. | ≤ 0,06 | 0,70 | ≤ 1,50 | ≤ 0,030 | 0,040 | 0,040 17,00 | 6,00 | 1,50 |
PRODUCT STANDARDS: ASTM A276, ASTM A479, EN10088-3
APPLICATIONS
The alloy has been designed to resist erosion corrosion or cavitation experienced in hydraulic applications. General areas for applications: Shafts, propellers, spindles, bolts, etc.
MECHANICAL PROPERTIES
| CONDITION | YIELD STRENGTH RP0.2 MPA | TENSILE STRENGTH RM MPA | ELONGATION [%] | HARDNESS [HB] | IMPACT CHARPY-V, -40ºC [J] |
| BAR | ≥ 750 | 900 – 1100 | ≥ 16 | 280 – 340 | ≥ 32 |
| QT900 | 920 | 1050 | 18 | 300 | 100 |
HEAT TREATMENT
Austenitize and quench from 950 to 1050°C and immediate temper at 600°C for 8 hours followed by cooling in air.
WELDABILITY
Good, the low carbon martensite with the finely dispersed residual austenite yields an excellent HAZ toughness in the as welded
condition. Preheating to 100°C – 200°C is suggested for very thick section or when the stress concentration after cooling require it.
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