446 Stainless Steel Sheet

446 is a high chromium ferritic heat resistant alloy with excellent resistance to oxidation, sulfidation and other forms of hot corrosion. This grade is most commonly used between 1500 - 2100°F, although its elevated temperature strength is quite low. 446 is the only heat resistant alloy that will tolerate molten copper and brass. As with other high chromium ferritic stainless, 446 embrittles severely in the 700-1000°F temperature range (885°F embrittlement). 446 should not be used in this temperature range unless nearly complete loss of room temperature ductility may be tolerated. Sigma phase embrittlement occurs upon long time exposure in the 1000-1300°F range.

Alloy	UNS Number	SAE Number
446	UNS S44600

GENERAL PROPERTIES

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 datasheet provides more details of grade 446 stainless steel.

PHYSICAL PROPERTIES

Melting Point	Density	Specific Gravity	Modulus of Elasticity in Tension
1510 ℃	7.80g/cm3	7.45	200 GPa

MECHANICAL PROPERTIES

Alloy	Tensile Strength Minimum (psi)	Yield Strength Minimum 0.2% offset (psi)	% Elongation in 2" Minimum
446 Annealed *	79,800	50,000	20

CHEMICAL PROPERTIES

Alloy	C	Si	Mn	P	S	Cr	Ni	Fe
446	0.2	1.00	1.5	0.04	0.03	23 – 27	0.25	Bal

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.

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