Iron Flat Stock | McMaster-Carr

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20,000 psi to 99,999 psi

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20 Products

About Steel

Compare over 50 grades of steel and cast iron to find the right material for you—all with material certificates for traceability.

Easy-to-Machine Gray Cast Iron Sheets and Bars

Yield Strength: Not Rated
Hardness: Rockwell C20 (Hard)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C50
Specifications Met: ASTM A247

Gray cast iron machines faster with less wear on cutting tools than most types of steel. It also absorbs vibration, so finished parts run quieter than those made of steel. It's often fabricated into gears, pulleys, and bushings.

For technical drawings and 3-D models, click on a part number.

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

3/8" Thick.
Wd.	Straightness Tolerance		1 ft. Lg.	2 ft. Lg.
2 1/8"	1/8" per 6 ft.	0000000	000000	0000000
3 1/8"	1/8" per 6 ft.	0000000	00000	000000
1/2" Thick.
2 1/8"	1/8" per 6 ft.	0000000	00000	000000
1 1/4" Thick.
2 1/4"	1/8" per 6 ft.	0000000	00000	000000
6 1/4"	1/8" per 6 ft.	0000000	000000	000000
2 5/8" Thick.
2 5/8"	1/8" per 6 ft.	0000000	000000	000000
3 1/8"	1/8" per 6 ft.	0000000	000000	000000
6 1/8"	1/8" per 6 ft.	0000000	000000	000000
8 1/8"	1/8" per 6 ft.	0000000	000000	000000
2 3/4" Thick.
12 1/4"	1/8" per 6 ft.	0000000	000000	00

Impact-Resistant Ductile Cast Iron Bars

Yield Strength: 55,000psi
Hardness: Rockwell C20 (Hard)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C60
Specifications Met: ASTM A536

Ductile cast iron is strong, resilient, and able to handle repeated stress without breaking. It also absorbs vibration, so finished parts run quieter than those made of steel.

For technical drawings and 3-D models, click on a part number.

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

1" Thick. (0" to 0.25" Tolerance)
Wd.		1 ft. Lg.	3 ft. Lg.
1 1/2"	00000000	000000	0000000
2 1/2"	00000000	000000	000000
2" Thick. (0" to 0.25" Tolerance)
2 1/2"	00000000	000000	000000
3 1/2"	00000000	000000	000000

Easy-to-Machine Impact-Resistant Ductile Cast Iron Bars

Yield Strength: 45,000 psi
Hardness: Rockwell C10 (Medium)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C50
Specifications Met: ASTM A536

Easier to machine without cracking than other impact-resistant ductile cast iron bars, these cast iron bars contain a high amount of ferrite. Use them to make cylinder and die blocks, rotary tables, and rail spacers. These bars are also known as 65-45-12 ductile iron bars. All conduct electricity. They will become magnetic if exposed to a magnetic field. They’re often used to replace low and medium carbon steel bars.

For technical drawings and 3-D models, click on a part number.

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

2 1/4" Thick. (0" to 0.25" Tolerance)
Width		1 ft. Lg.	2 ft. Lg.
4 1/4"	0000000	0000000	0000000
3 1/4" Thick. (0" to 0.25" Tolerance)
3 1/4"	0000000	000000	000000
4 1/4"	00000000	000000	00
4 1/4" Thick. (0" to 0.25" Tolerance)
4 1/4"	00000000	000000	00
5 1/4" Thick. (0" to 0.25" Tolerance)
5 1/4"	00000000	000000	00
6 1/4" Thick. (0" to 0.25" Tolerance)
6 1/4"	00000000	000000	00