Stainless Stell Valve Balls 304/304L

304 is a variation of the basic 18-8 grade, Type 302, with a higher chromium and lower carbon content. Lower carbon minimizes chromium carbide precipitation due to welding and its susceptibility to intergranular corrosion. In many instances, it can be used in the ”as-welded“ condition, while Type 302 must be nnealed in order to retain adequate corrosion resistance. Type 304L is an extra low-carbon variation of Type 304 with a 0.03% maximum carbon content that eliminates carbide precipitation due to welding. As a result, this alloy can be used in the ”as-welded“ condition, even in severe corrosive con-ditions. It often eliminates the necessity of annealing weldments except for applications specifying stress relief. It has slightly lower mechanical properties than Type 304.

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Composition

Type 304 %

Type 304L %

Carbon

0.08 max.

0.03 max.

Manganese

2.00 max.

2.00 max.

Phosphorus

0.045 max.

0.045 max.

Sulfur

0.030 max.

0.030 max.

Silicon

0.75 max.

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0.75 max.

Chromium

18.00 – 20.00

18.00 – 20.00

Nickel

8.00 – 12.00

8.00 – 12.00

Molybdenum

2.00 – 3.00

2.00 – 3.00

Nitrogen

0.10 max.

0.10 max.

Iron

Balance

Balance

Typical Room Temperature Properties

Elevated Temperature Properties

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