ASTM A36 Angle Steel Size Chart

American Standard Angle Steel (ASTM) is a type of hot-rolled steel with an L-shaped cross-section, composed of two perpendicularly intersecting steel plates with equal or unequal sides. It features a right-angle structure, high load-bearing capacity, and ease of connection. ASTM A36, developed by the American Society for Testing and Materials (ASTM), is a standard for carbon structural steel. Its hot-rolled angle steel, due to its balanced performance and relatively low cost, has become a core material in fields such as construction, machinery, and energy.

Standard Version Update: The latest version is ASTM A36/A36M-22 (revised in 2022), which primarily optimizes dimensional tolerance ranges and mechanical property verification methods, replacing the 2019 version.

What Is ASTM A36 Angle Steel?

ASTM A36 angle steel refers to L-shaped structural steel produced under the ASTM A36 standard, which is defined by ASTM International.

It is a low-carbon steel with good mechanical properties, making it ideal for structural applications requiring strength and durability without high cost.

ASTM A36 Angle Steel Size Chart (Equal Angles)

Below is a commonly used ASTM A36 equal angle steel size chart (in inches and mm):

Size (inches)	Leg Size (mm)	Thickness (mm)	Weight (kg/m)
1" × 1" × 1/8"	25 × 25	3	1.12
1-1/2" × 1-1/2" × 1/8"	38 × 38	3	1.75
2" × 2" × 1/4"	50 × 50	6	3.77
3" × 3" × 1/4"	75 × 75	6	5.67
4" × 4" × 3/8"	100 × 100	10	11.9
5" × 5" × 3/8"	125 × 125	10	14.9
6" × 6" × 1/2"	150 × 150	12	22.6

Unequal Angle Steel Sizes
In addition to equal angles, ASTM A36 also includes unequal angle steel for specialized structural uses.
Examples:
75 × 50 × 6 mm
100 × 75 × 8 mm
150 × 90 × 10 mm
Unequal angles are often used where different load directions require varied leg lengths.

Mechanical Properties of ASTM A36 Angle Steel

Property	Value
Yield Strength	≥ 250 MPa
Tensile Strength	400–550 MPa
Elongation	≥ 20%

ASTM A36 Angle Steel Standards and Material Properties

1. Standards:
ASTM A36/A36M-19: Defines the chemical composition, mechanical properties, and heat treatment processes for carbon structural steel.

ASTM A6/A6M: Specifies dimensional tolerances for hot-rolled structural steel, such as a permissible width deviation of ±1.6mm (≤100mm).

2. Material Properties:
Chemical Composition: Carbon (C) ≤0.26%, Manganese (Mn) ≥0.80%, Phosphorus (P) ≤0.040%, Sulfur (S) ≤0.050%, Silicon (Si) ≤0.40%.

3. Mechanical Properties:
Yield Strength ≥250 MPa (thickness ≤200mm);
Tensile Strength 400-550 MPa;
Elongation ≥20% (thickness ≤50mm).
Processability: Good weldability, cutability, and cold forming ability; no low-temperature impact toughness requirements.

Conclusion

ASTM A36 hot rolled angle steel is a reliable and cost-effective solution for a wide range of structural and industrial applications. With standardized sizes, strong mechanical properties, and versatile usage, it continues to be a preferred material in global construction and manufacturing industries.

Whether you are sourcing for a large infrastructure project or small fabrication work, understanding ASTM A36 angle steel specifications and size charts will help you make informed purchasing decisions and improve project efficiency.

More dimensional information can be found in the PDF version; this is for reference only. ：ASTM A36 Angle Steel Size Chart