A569 Type A

①Types A and C may be furnished as vacuum degassed and/or chemically stabilized at the producers option.
② For carbon levels less than or equal to 0.02%, columbium and/or titanium may be used as chemical stabilizing elements in Type A and C at the producers option. In such case, the Table limitations on such elements do not apply. Rather, the limit on columbium shall be 0.1% maximum and the limit on titanium shall be 0.15% maximum.
③Types B describes the most common product previously included in Specification A569/A569M.
④Specify Type B to avoid carbon levels below 0.02%.
⑤When an aluminum deoxidized steel is required for the application. Commercial Steel (CS) may be ordered to a minimum of 0.01% total aluminum.
⑥Where an ellipsis (...) appears in this table, there is no requirement, but the analysis shall be reported.
⑦ When copper steel is not specified, the sum of copper, nickel, chromium, and molybdenum shall not exceed 0.5% on heat analysis. When one or more of these elements is specified, the sum does not apply; in which case, only the individual limits on the remaiming elements will apply.
⑧ Chromium is permitted ,at the producers option, to 0.25% maximum when the carbon is less than or equal to 0.05%. In such case, the limit on the sum of the four elements in Footnote ⑦ does not apply.

The yield strength tends to increase and elongation tends to decrease as the sheet thickness decreases. These properties represent those typical of material in the thickness range of 0.100 to 0.150 in. (2.5 to 3.5 mm)