JIS G3466 STKR400 TUBE

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JIS G3466 STKR400 is a commonly used steel grade specified in the Japanese Industrial Standards (JIS) for carbon steel pipes used in structural purposes. It is widely employed in various construction and mechanical applications due to its excellent balance of strength, weldability, and affordability.

Material: Carbon steel

Standard: JIS G3466 - Carbon steel pipes for ordinary structural purposes

Grade: STKR400

Minimum Yield Strength: 400 MPa (58,000 psi)

Tensile Strength: 400-510 MPa (58,000-74,000 psi)

Elongation: Minimum 17% (depending on pipe size and wall thickness)

Chemical Composition (typical):

Carbon (C): ≤ 0.30%

Manganese (Mn): ≤ 1.60%

Phosphorus (P): ≤ 0.040%

Sulfur (S): ≤ 0.040%

High Strength: STKR400 offers a minimum yield strength of 400 MPa, making it suitable for load-bearing structures and components.

Good Weldability: The controlled carbon content and chemical composition ensure good weldability using common welding methods.

Cost-Effective: Compared to higher-grade steels, STKR400 provides a cost-effective solution for structural applications without compromising on essential strength requirements.

Wide Availability: Being a standard JIS grade, STKR400 pipes are readily available in various sizes and wall thicknesses.

STKR400 pipes find extensive use in a wide range of structural applications, including:

Building Construction:

Structural frames and columns

Roof trusses and purlins

Scaffolding and temporary structures

Bridge Construction:

Bridge girders and beams

Railings and guardrails

Industrial Structures:

Factory buildings and warehouses

Transmission towers and poles

Support structures for machinery and equipment

Other Applications:

Fencing and gates

Agricultural equipment

General-purpose structural components

STKR400 is often compared to other structural steel grades like STK400 and SS400. While all three grades share similar minimum yield strengths, STKR400 offers slightly better weldability and formability due to its controlled chemical composition.

JIS G3466 STKR400 is a versatile and widely used carbon steel grade that provides an excellent combination of strength, weldability, and cost-effectiveness for various structural applications. Its availability, reliability, and compliance with JIS standards make it a preferred choice for engineers and contractors in Japan and other countries that adopt JIS standards.