ASTM A36 Steel Plate Hot Rolled Mild Steel

What is ASTM a36 steel plate?

ASTM a36 steel plate is a type of hot rolled mild carbon steel. It is one of the most widely used construction steel around the world due to its excellent weldability, availability and cost-effectiveness. ASTM a36 plate offers good strength-to-weight ratio and is easily formable which makes it suitable for a variety of structural and machinery applications.

Why Purchasing sample of this type of steel is significant for making your product?

Purchasing a sample of ASTM a36 steel plate before bulk order helps understand the material properties better. It allows you to test the sample for mechanical properties like tensile strength, ductility etc. and check if it meets your product requirements. A sample also helps examine the surface finish, detect any defects and verify chemical composition through tests. This gives confidence in the supplier and ensures the bulk order will meet specifications to manufacture the intended product.

What is ASTM a36 steel?

ASTM a36 steel is a low carbon mild steel developed by ASTM International through the standard ASTM A36. It has carbon content ranging from 0.05% to 0.3% which makes it easily weldable and formable. The ‘a’ in ASTM a36 denotes that it is carbon steel while 36 represents the standard number. A36 is one among other numbered ASTM steels widely used in construction, ships, mining equipment and general fabrication purposes.

Carbon Steel Plates

Why is ASTM a36 material called hot rolled Steel?

ASTM a36 steel is produced through the hot rolling process where steel ingots are reheated to high temperatures and rolled into basic shapes like angles, beams, channels, flats etc. Hot rolling enhances the material properties by aligning carbon atoms and increasing strength through work hardening. It also provides an excellent surface finish and close dimensional tolerance suitable for fabrication. That’s why ASTM a36 steel obtained from hot rolling mill is called hot rolled steel.

Available Forms in Shangang Steel

ASTM a36 steel plate is commonly available in various standard sizes and shapes like plate, angles, channels, beams, flats, rounds etc. in the market. It is cut-to-size from hot rolled coils according to project requirements and comes in rectangular, square or round plates of different widths, lengths and thicknesses. Angles, beams and other structural sections are rolled in standard AISC sizes.

Characteristics of ASTM a36 steel

  • Excellent weldability and formability due to low carbon content
  • High strength-to-weight ratio providing economical design flexibility
  • Good corrosion resistance and can be galvanized for exterior applications
  • Easily workable and machinable for hollow sections, pipes, fittings etc.
  • Durable and versatile material suitable for a wide range of industrial applications

The Chemical Composition of ASTM a36 steel plate

  • Carbon: 0.05-0.25%
  • Manganese: 0.60-1.20%
  • Phosphorus: ≤0.04%
  • Sulfur: ≤0.05%
  • Silicon: 0.15-0.35%

Mechanical Properties of ASTM a36 steel plate

  • Yield Strength: 250-400 MPa
  • Tensile Strength: 400-550 MPa
  • Elongation: 20-50%
  • Hardness: Brinell 200-300
  • Fatigue Strength: Good

Equivalent Material Grades in Other International Standards

Some equivalent grades of ASTM a36 steel in other standards include S235JR, S275JR, EN10025-2 S275J0, IS 2062 E250, JIS G3101 SS400 etc. These standards have similar composition range and mechanical properties to ASTM a36.


  • Building construction – beams, columns, trusses
  • Pressure vessels – boilers, tanks
  • Ships – hulls, decks
  • Pipes & pipelines – water, oil, gas
  • Transportation -trailers, wagons
  • Machine components – gears, fittings
  • Fabrication work – machine frames, ladders

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