Specifications: UNS S41600
Applications:
Alloy 416HT is generally used for parts that are extensively machined and require the corrosion resistance of a 13% chromium stainless steel. Applications that generally use Alloy 416 include:
- Electrical motors
- Nuts and bolts
- Pumps
- Valves
- Automatic screw machine parts
- Washing machine components
- Studs
- Gears
Standards:
- ASTM/ASME: UNS S41600
- EURONORM: FeMi35Cr20Cu4Mo2
- DIN: 2.4660
Corrosion Resistance:
- Demonstrates corrosion resistance to natural food acids, waste products, basic and neutral salts, natural waters, and most atmospheric conditions
- Less resistant that the austenitic grades of stainless steel and also the 17% chromium ferritic alloys
- High sulfur, free-machining grades like Alloy 416HT are unsuitable for marine or other chloride exposure
- Maximum corrosion resistance is achieved in the hardened condition, with a smooth surface finish
Heat Resistance
- Fair resistance to scaling in intermittent service up to 1400oF (760oC) and up to 1247oF (675oC) in continuous service
- Not recommended for use in temperatures above the relevant tempering temperature if maintenance of mechanical properties is important
Welding Characteristics
- Poor weldability
- If welding is necessary use Alloy 410 low hydrogen electrodes
- Pre-heat to 392 to 572°F (200-300°C)
- Follow immediately with annealing or re-hardening, or a stress relief at 1202 to 1247°F (650 to 675°C)
Machinability
- Has outstanding machinability
- Best machinability is in the sub-critical annealed condition
