Custom 455® Stainless Steel Bar - ASTM F 899

Inventory Size Ranges for Custom 455®

Type	Thickness	AMS Standards	ASTM	UNS	Get a Quote
Bar	0.1875" - 2.000"	AMS 5617	ASTM F 899	UNS S45500	Get a Quote

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Characteristics of Custom 455®

Customer 455® stainless has displayed excellent resistance to oxidation up to approximately 1100°F (593°C). Long-term exposure to elevated temperatures can result in reduced toughness in precipitation hardenable stainless steels. The reduction in toughness can be minimized in some cases by using higher aging temperatures. Short exposure to elevated temperatures can be considered, provided the maximum temperature is at least 50°F (28°C) less than the aging temperature. 

Working with Custom 455®

This stainless can be machined in the annealed condition and welded in much the same manner as other precipitation hardenable stainless steels. Because of its low work-hardening rate, it can be extensively cold formed. The dimensional change during hardening is only about -0.001 in/in, which permits close-tolerance finish machining in the annealed state. 

Customer 455® is easily forged within temperature range of 1650/2300°F (899/1260°C). For optimum mechanical properties, material to be forged should be heated uniformly to 1900/2100°F (1038/1149°C) and soaked at heat; finishing temperature should be within the range of 1500/1700°F (816/927°C) to obtain the best grain size and properties after heat treating. Cold working is readily performed despite the fact that this material is martensitic in the annealed condition. Deep drawing or stretching operations will require intermediate anneals because the elongation tends to be localized. For other cold-forming operations, such as cold drawing and cold rolling, the work-hardening rate in the annealed condition is extremely low, allowing considerable cold working without intermediate annealing. 

This material can be satisfactorily welded by the shielded fusion and resistance welding process. Oxyacetylene welding is not recommended, since carbon pickup in the weld may occur. Preheating is not required to prevent cracking during the welding of this alloy. If welded in the solution-annealed condition, the alloy can be directly aged to the desired strength level after welding. However, the optimum combination of strength, ductility, and corrosion resistance is obtained by solution annealing the welded part before aging. If welded in the overaged condition, the part should be solution annealed before aging.