446 stainless steel plate

The grade 446 stainless steel is a ferritic, non-heat treatable stainless steel that provides good resistance to high temperature oxidation and corrosion. The following data sheet provides more details of grade 446 stainless steel.

Chemical Composition
 The chemical composition of grade 446 stainless steel is outlined in the following table.

Physical Properties
 The following table shows the physical properties of grade 446 stainless steel.

Mechanical Propertiesal Properties
 The mechanical properties of grade 446 stainless steel are displayed in the following table.

Thermal Properties
 The thermal properties of grade 446 stainless steel are given in the following table.

Other Designations
 Equivalent materials to grade 446 stainless steel are:
 AISI 446
 ASTM A176
 ASTM A268
 ASTM A276
 ASTM A314
 ASTM A473
 ASTM A511
 ASTM A815
 DIN 1.4762
 QQ S763
 QQ S766
 ASME SA268
 ASTM A580
 FED QQ-S-763
 FED QQ-S-766
 MIL SPEC MIL-S-862
 SAE J405 (51446)

Fabrication and Heat Treatment

Machinability

Machinability of the grade 446 stainless steel is possible at slow speeds with positive feeds, rigid mounts and sharp tooling surfaces.

Welding

The grade 446 stainless steel can be easily welded using most of the traditional methods except oxyacetylene welding. Type 308 welding material can be used if required, but it will not exhibit scaling resistance equal to the base metal. Differences in coefficient of thermal expansion of base and weld metal has to be taken into consideration.

Forging

Forging can be started at 1149℃ (2100°F) and completed at 871℃ (1600°F). The last 10% of forging has to be performed below 871℃ (1600°F) to gain grain refinement and room temperature embrittlement.

Hot Working

The hot working of grade 446 stainless steel is performed in between the ranges 1093- 1177℃ (2000-2150°F). The last 10% of hot working has to be performed below 871℃ (1600°F) to gain grain refinement

Cold Working

The grade 446 stainless steel is more difficult to cold work than other stainless steels due to the high level of chromium content.

Annealing

Annealing of the grade 446 stainless steel has to be soaked at 816℃ (1500°F) and then water quenched. The temperature should not exceed 900℃ (1650°F) at any time and slow cooling below 649℃ (1200°F) can cause loss of ductility.

Applications

The grade 446 stainless steel can be used in the following products:
X-ray tube bases
 Boiler baffles
 Oil burner components
 Annealing boxes
 Industrial mufflers
 Kiln linings
 Glass molds
Furnace parts

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