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.