This is a high carbon martensitic stainless with moderate corrosion resistance good strength and the ability to obtain and keep excellent hardness (Rc 60) and wear resistance.
Applications: Ball bearings and races, gage blocks, molds and dies, cutlery, valve components, knives and measuring instruments.
Machinability: Best machined in the annealed condition. Tough, stringy chips can be best handled by the use of chip breakers. Carbide or ceramic tooling is recommended.
Welding: This alloy is not commonly welded due to its tendency to air harden. If it must be welded, preheat to 500 F (260 C) and post weld treat at 1350-1400 F (732-760 C) for 6 hours followed by a slow furnace cooling to avoid cracking. Use similar filler metal and high heat inputs during operations.
Hot Working: Pre-heat to 1400 F (760 C), then bring slowly up to 1900-2200 F (1038-1204 C)before proceeding. Do not work this material below 1700 F (927 C). Cool material slowly after working and once at room temperature, anneal fully.
Cold Working: This alloy is considered only slightly cold workable by common practices.
Annealing: 1550-1600 F (843-871 C), followed by very slow furnace cooling.
Tempering: For maximum properties, soak at 300 F (148 C). Maximum obtainable hardness is RC 60.
Hardening: Bring the material slowly up to 1400 F (760 C), then on to a soak temperature of 1850 F (1010 C), air or oil cool.
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Additional information
| tempers | |
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| conditions | |
| specifications | AMS 5618, AMS 5630 QQ-S-763, AMS 5880, Other (Please Specify) |
| dimension-1 | .1875", 1-1/2”, 1-1/4”, 1-1/8”, 1-11/16, 1-13/16”, 1-15/16”, 1-3/16”, 1-3/4”, 1-3/8”, 1-5/16”, 1-5/32”, 1-5/8”, 1-7/16”, 1-7/8”, 1-9/16”, 1”, 1/2", 1/4", 1/8”, 11/16", 13/16", 15/16”, 2-1/2”, 2-1/4”, 2-1/8”, 2-11/16”, 2-13/16”, 2-15/16”, 2-3/16”, 2-3/4”, 2-3/8”, 2-5/16”, 2-5/8”, 2-7/16”, 2-7/8”, 2-9/16”, 2", 3”, 3/16", 3/4", 3/8", 5/16", 5/8", 7/16", 7/8", 9/16", Other (Please Specify) |
| dimension-2 | |
| dimension-3 |