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ASTM A568 Structural steel sheet and coil mechanical testing

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ASTM A568/A568M Standard Specification for Steel, Sheet, Carbon, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, General Requirements

ASTM A568 is the general‑requirement standard for hot‑rolled and cold‑rolled carbon steel, structural steel, and high‑strength low‑alloy (HSLA) steel sheet (coils and cut lengths). It specifies mandatory tests to verify chemical, mechanical (tension test, bending test) etc., 


ASTM A568 Steel Type:

Carbon steel— the designation for steel when no minimum content is specified or required for aluminum, chromium,cobalt, columbium, molybdenum, nickel, titanium, tungsten,vanadium, zirconium, or any element added to obtain a desiredalloying effect; when the specified minimum for copper does not exceed 0.40 %; or when the maximum content specified for any of the following elements does not exceed the percentages.

ASTM A568 Structural steel sheet and coil mechanical testing


Test stipulated in the ASTM A568 details introduction: 

1, Tension Test (Mechanical)

Determines the structural integrity, ductility, and load-bearing capacity of the steel sheet.

Test Methods

According ASTM A370 (Mechanical Testing of Steel Products). Measure Yield Strength, Tensile Strength, and Elongation.

Test principle

Applying a controlled tensile force to a specimen until fracture to measure its resistance to being pulled apart.

Test Sample InformationFull-size longitudinal or transverse specimens, depending on the product width and thickness. 
Test EquipmentUniversal testing machine (UTM)Electronic Universal Testing Machine

Extensometer (ASTM E83); 

Test Procedure

Test specimens must be prepared and tested strictly in accordance with ASTM A370.

Calculated values (like tensile strength) must be rounded to the nearest 1 ksi.

Conformance is determined using the rounding method of Practice E29.

2. Bend Test (Ductility)   Evaluates the material's ability to deform without cracking, which is critical for fabrication processes involving cold bending.
Test MethodCold bending around a fixed cylindrical mandrel. As Per ASTM E290 (Test Methods for Bend Testing of Material for Ductility).
Test Principle

Bending the specimen to a specified angle (commonly 90°) around a pin or mandrel to observe if the outer fiber of the steel cracks or fractures.

Test Sample InformationStrip specimens of a defined width and length, taken parallel or transverse to the rolling direction as required by the specific product spec.
Test Equipment

Universal testing machine (UTM)Electronic Universal Testing Machine with bending test fixtures; 

Bend test machine. 

Test Procedure

Bend 180° around a specified mandrel; no cracks or fractures permitted on the outer bent surface.

Other test: Chemical Composition Analysis. Dimensional and Flatness Inspection. 


ASTM A568 Main Application Fields: 

ASTM A568 steel sheet is widely used in:

Automotive: Body panels, frames, chassis, structural components (A1008/A1011).

Home Appliances: Refrigerators, washers, ovens (exposed‑finish cold‑rolled sheet).

Construction: Roofing, siding, wall panels, structural framing.

Furniture & Storage: Cabinets, racks, shelving.

Pressure Vessels: A414 grades for low‑pressure vessels.

Transportation: Truck bodies, trailers, rail components.

General Fabrication: Stamped, formed, and welded parts.


Why ASTM A568 Tests Are Critical for the Steel sheet and coil? 

Ensure Formability: Tension and bend tests confirm the sheet can be stamped, bent, and drawn without cracking—essential for automotive and appliance manufacturing.

Guarantee Mechanical Consistency: Tensile and chemical tests validate strength, ductility, and chemistry for reliable load‑bearing performance.

Enforce Dimensional Conformance: Tight tolerances ensure proper fit in automated assembly, fabrication, and stamping lines.

Related products and device

ASTM A568 Steel Sheet Coil Tensile, Bending Universal Testing Machine

United Test make Universal Testing Machines are known for their long lasting trouble-free performance and highest quality material used in the manufacturing process. The Hydraulic universal testing machine can perform tension, compression, flexure/bending and shearing test for kinds of specimens. Suitable for metal and nonmetal material, such as iron, steel, steel bar, rebar, cement, concrete, rod and so on. Specially design for production, research, student training and industrial laboratory. Available in wide range of loadframe capacities (300kN to 2000kN)/(10Ton to 200Ton) and with combination of control panels (Digital, Computerized) makes United Test product range suitable for every customer requirement.

ASTM A568 Steel Sheet Coil tensile testing machine

WDW Series Computer Control Electronic Universal Testing Machine made by UNITEDTEST range from 100N to 600KN load capacity with various models like single columns, table type, door frame type etc., is used to perform tension, compression, flexure/bending, shearing, peeling etc., test for metal and nonmetal specimens.

ASTM A568 Steel Sheet Coil Bending Testing Machine

Metal Bending & Rebending Testing Machine is used for bending tests of metal materials such as rods, sheets and rebar for construction, and is loaded with two-way hydraulic cylinders, adjusting the roll spacing by hand wheels and being able to lock itself.

ASTM A568 Steel Sheet Coil Bending test fixture for UTM

Metal bending test fixture used measure the ductility of metallic materials, bent the test specimen to a predetermined angle or until the specimen fractures. Conform with ASTM E290, ISO 7438, and JIS Z2248 standard.

Related Standard

ASTM A370 Test method for mechanical testing of steel

ASTM A370 Standard Test Methods and Definitions for Mechanical Testing of Steel Products


ASTM A370 test methods cover procedures and definitions for the mechanical testing of steels, stainless steels, and related alloys. The various mechanical tests herein described are used to determine properties required in the product specifications. Variations in testing methods are to be avoided, and standard methods of testing are to be followed to obtain reproducible and comparable results. In those cases in which the testing requirements for certain products are unique or at variance with these general procedures, the product specification testing requirements shall control.


Covering tests like Tension, Bend, Hardness, Brinell, Rockwell, Portable, and Impact, each catering to distinct aspects of mechanical property assessment. Moreover, it accommodates annexes for specific product types, including Bar Products, Tubular Products, Fasteners, Round Wire Products, and more, ensuring a holistic approach to testing.


ASTM E290 Metal Bend testing of materials ductility

ASTM E290 Standard Test Methods for Bend Testing of Material for Ductility


ASTM E290 is a destructive mechanical test standard that evaluates the ductility and structural soundness of metallic materials (and welds) by subjecting specimens to controlled bending deformationASTM International. It is a widely used quality control and qualification method for metals, alloys, and welded joints across industries.

ISO 7438 Metallic materials Bending test details

ISO 7438 is a standard that specifies a method for determining the ability of metallic materials to undergo plastic deformation in bending. It is used to evaluate the flexural strength and stiffness of a material , The bend test shall be carried out in testing machines equipped with a bending device with two supports and a former; bending device with a V-block and a former; bending device with a clamp. 

ISO 6892-1 Metallic materials - Tensile testing

ISO 6892 specifies the method for tensile testing of metallic materials and defines the mechanical properties which can be determined at room temperature.  Related standard ASTM E8 , JIS Z2241 Method of tensile test for metallic materials.

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