1.4749 - aisi 446-1 pipe, wire, circle
Ferritic heat-resistant steel. Maximum operating temperature up to 1000 ° C. Specific gravity 7.7 g / cm 3. Manufactured in accordance with EN 10095: 1999 Heat-resistant steels and nickel alloys, EN 10088−1: 2005 Stainless steels. The alloy exhibits ductility and viscosity after annealing. It has good corrosion resistance, high strength. List of stainless steels. The closest analogue is X18CrN28.
Percent composition, EN 10095−1999
|basis||0.15 — 0.2||≤1||≤1||≤0.04||≤0.015||26 — 29||0.15 — 0.25|
Tempering temperature 1900 ° F (1038 ° C) for 30 minutes and cooling below 60 ° F (16 ° C) for complete martensite conversion.
Successfully welded by conventional arc welding methods. This alloy should not be welded by gas-oxygen welding. If necessary, the use of AWS E / ER630 fill material is recommended.
High strength of rolled steel causes certain difficulties in machining. It should also take into account the high abrasive ability of the steel alloy, Can be treated in an annealed condition. Cutting edges with a special coating should be used.
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