440A Stainless Steel | McMaster-Carr

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9 Products

About Stainless Steel

Compare over 25 types of stainless steel to find the right material for you—all with material certificates for traceability.

Impact-Resistant 440A Stainless Steel

440A stainless steel resists damage from impact and abrasion.

Sheets are often used for cutlery and valve components. They maintain their corrosion resistance in temperatures up to 1920° F.

Balls are hollow. Use them in floats and ball valves. They maintain their corrosion resistance in temperatures up to 250° F.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

Foil

Yield Strength: Not Rated
Hardness: Rockwell C55 (Very Hard)
Heat Treatment: Hardened

Thick.	Thick. Tolerance	Fabrication	Flatness Tolerance	Magnetic Properties		3" × 6"	6” × 6”	6" × 12"	6" × 24"
0.01"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	000000	000000	000000	0000000

Sheets

Yield Strength: Not Rated
Hardness: Rockwell C55 (Very Hard)
Heat Treatment: Hardened

Thick.	Thick. Tolerance	Fabrication	Flatness Tolerance	Magnetic Properties		3" × 6"	6” × 6”	6" × 12"	6" × 24"
0.015"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	000000	000000	000000	0000000
0.02"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	00000	00000	000000	000000
0.025"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	00000	00000	000000	000000
0.031"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	00000	00000	000000	000000
0.039"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	00000	00000	000000	000000
0.047"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	00000	00000	000000	000000
0.062"	-0.001" to 0.001"	Cold Worked	0.010" per in.	Magnetic	000000	00000	000000	000000	000000

Balls

Yield Strength: Not Rated
Hardness: Rockwell C55 (Very Hard)
Heat Treatment: Hardened
Specifications Met: SAE AMS-QQ-S-763

Mirror-Like
Dia.	Dia. Tolerance	Mechanical Finish	Magnetic Properties		Each
1"	-0.005" to 0.005"	Tumbled	Magnetic	0000000	000000