What is ASTM A1011?
ASTM A1011 is a hot-rolled steel sheet and strip specification. Thicknesses range from under 0.064” up to 0.230”.A1011 is one of the most widely used specification for hot-rolled steel; it covers a wide range of grades suitable for numerous applications. Formerly known as A569, A570, A607, A622, A715, A570
Available Designations
- Commercial Steel (CS): furnished to a chemical composition. Mechanical properties are nonmandatory.
- Drawing Steel (DS): furnished to a chemical composition. Mechanical properties are nonmandatory. Designed for improved forming compared to Commercial Steel.
- Structural Steel (SS): furnished to a chemical composition and defined mechanical properties.
- High-Strength Low Alloy Steel (HSLAS): furnished to a chemical composition and defined mechanical properties. HSLA steels contain strengthening microalloys (niobium, vanadium, titanium) singly or in combination.
- High-Strength Low Alloy Steel with Improved Formability (HSLAS-F): HSLA steel with improved formability and inclusion shape control.
- Ultra-High Strength Steel (UHSS): UHSS steel has increased strength compared to HSLA steel.
Defined Sizes
ASTM A1011 material is defined up to 0.230”.For material over 0.230”, see ASTM A1018, ASTM A656, or ASTM A572.
Ease of Fabrication
ASTM A1011 covers a wide range of grades with a large variation in properties.
Weldability
A material’s carbon equivalency(CEV) indicates the propensity to harden and crack after welding. CEV is calculated using chemistry, so while specific heats of steel will have unique CEVs, general calculations can be made using the chemical limits outlined in A1011. Please Ask an Expert for more information.
Increased carbon content is associated with increased harden ability, leading to the risk of cracking after welding. In this specification, HSLAS steel are available in two classes, Class 1 and Class 2. Class 1 carbon maximums range from 0.22% to 0.26% (grade dependent), and Class 2 carbon maximums are 0.15%across all available grades. Because of this, Class 2HSLAS steels will generally be easier to weld.
Richer chemistries increase the CEV, so stronger grades require more welding finesse.
Steel Warehouse can limit carbon contents to improve thermal cutting, formability, and welding performance.
Thermal Cutting
Laser and plasma cutting is similar to weldability in terms of the heated cut edge hardening and cracking.
Bendability
Commercial and drawing steels (CS and DS) shall be capable of being bent 180 degrees in any direction without cracking on the bend line.
High-Strength Low Alloy (HSLAS), High-Strength LowAlloy with Improved Formability (HSLAS-F), and Ultra-High Strength Steels (UHSS) have suggested minimum bend radii that guarantee crack-free cold bending.
Availible Customizations
- Pickling
- Slitting
- Temper Passing
- Shearing
- Blanking
- Laser Cutting
Notes from the Technical Group
Grade popularity makes sourcing easier–steel mills may require heat-sized orders for grades that are not often produced.HSLAS-F grades 50 and 80 and UHSS grade 100 are the most utilized grades defined in ASTM A1011
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