Forging Characteristics of Jethete M152™
Whether at room or slightly higher temperatures, Jethete M152 provides sufficient ductility and high tensile strength. Jethete M152 is a new martensitic stainless steel similar to Jethete M151, and is capable of resisting heat and corrosion.
Chemical Composition of Jethete M152™
- Carbon 0.15 max
- Chromium 11.0-13.0
- Nickel 2.0-3.0
- Molybdenum 1.5-2.0
- Vanadium 0.20-0.50
- Iron remainder
Applications of Jethete M152™
- High-heat bolting
- Gas turbine parts
Heat Treatment of Jethete M152™
- Jethete M152 can be annealed by heating to 1292°F (700°C), then air cooling
- To harden Jethete M152
- Heat to 1922°F (1050°C)
- Air quench
- Temper at 932° to 1292°F (500° to 700°C)
Machinability of Jethete M152™
- Fair rating – approximately 54% of AISI B1112 Besemer screw stock
- Easier machining than Type 18-8 stainless
- Maintain constant feeds and speeds
- Rigid tools and holders
- Turning tools – grind with side rake of 8-15°
- Drilling point 140°
- Grind threading tools with 10-15° back rake
- Cobalt high-speed steel tools
- Turning: 85-115 sfpm
- Drilling: 35-75 sfpm
- Milling: 70-115sfpm
- Reaming: 20-60 sfpm
- 200-400 sfpm cutting speeds for finishing and roughing with carbide single-point turning tools
- Sulfurized cutting oils recommended
Workability of Jethete M152™
- Once annealed, Jethete M152 can be bent, drawn or spun.
- Easily forged – preheat to 1400° to 1450°F (760° to 788°C); quickly heat to 2050° to 2102°F (1121° to 1150°C). Forge above 1450°F (788°C) only
- Cool to 212°F (100°C); quickly anneal at 1256° to 1292°F (680° to 700°C), then air cool
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