Structural Carbon Steel For Steel Structure Projects

Carbon steel is widely used in steel structure projects due to its stable mechanical performance, good weldability, and cost efficiency.
In structural applications, material selection focuses on load level, structural role, and fabrication requirements, rather than the number of available grades.

For our steel structure projects, we primarily work with two commonly specified structural carbon steel grades:

ASTM A572 50등급 – for primary load-bearing members
ASTM A36 – for secondary structural members

These grades are widely used in building and industrial steel structures and are suitable for welded structural systems.

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Material Scope & Engineering Support

The carbon steels supplied are intended for structural applications, suitable for welded steel structures in building and industrial projects.

In addition to material supply, we support drawing-based fabrication of structural steel components according to project requirements, including columns, beams, connection plates, base plates, and other project-specific structural assemblies.

Fabrication scope and material grade are aligned with approved drawings and technical specifications.

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angle

채널

플랫 바

square bars

튜브

Structural Steel Grades for Project Use

ASTM A572 50등급

ASTM A36

Comparison

ASTM A572 50등급

Primary Structural Members

ASTM A572 Grade 50 is used for primary load-bearing components where higher strength is required.

Typical mechanical properties (reference):

Minimum yield strength: 355 MPa (50 ksi)
Tensile strength: 450–620 MPa
Elongation: ≥ 18–20% (depending on thickness)

Typical applications:

Main columns
Primary beams
Major trusses and transfer members

This grade allows for higher load capacity or optimized section sizes in primary structural systems.

Consult the Materials ↗

ASTM A36

Secondary Structural Members

ASTM A36 is used for secondary and auxiliary structural members with lower load demand.

Typical mechanical properties (reference):

Minimum yield strength: 250 MPa (36 ksi)
Tensile strength: 400–550 MPa
Elongation: ≥ 20–23% (depending on thickness)

Typical applications:

Secondary beams
Purlins and bracing
Platforms, stairs, and auxiliary frames

ASTM A36 offers excellent weldability and fabrication flexibility, making it suitable for non-critical structural members.

Consult the Materials ↗

Grade Comparison for Structural Applications

목	ASTM A36	ASTM A572 50등급
Structural role	Secondary members	Primary members
Min. yield strength	36 ksi (250 MPa)	50 ksi (355 MPa)
Tensile strength	400–550 MPa	450–620 MPa
용접성	훌륭한	Very good
Typical applications	Purlins, bracing, platforms	Columns, main beams
Relative cost	낮추다	더 높은