JIS G3446 Mechanical Steel Tube; JIS G3446 Mechanical Steel Tubing

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JIS G3446 Mechanical Steel Tube

JIS G3446 specifies the requirements for stainless steel mechanical tubes used in structural and mechanical applications, Which commonly used in the construction of machinery, automobiles, and other engineering structures.

Description

What is JIS G3446 Mechanical Steel Tube?

JIS G3446 is a Japanese industrial standard that specifies the requirements for stainless steel mechanical tubes used in structural and mechanical applications. These tubes are commonly used in the construction of machinery, automobiles, and other engineering structures.

JIS G3446 Mechanical Steel Tube Material Grade:

Grade	Chemical Composition
SUS304TP	C: ≤0.08%, Si: ≤1.00%, Mn: ≤2.00%, P: ≤0.045%, S: ≤0.030%, Cr: 18.0-20.0%, Ni: 8.0-10.5%
SUS304LTP	C: ≤0.03%, Si: ≤1.00%, Mn: ≤2.00%, P: ≤0.045%, S: ≤0.030%, Cr: 18.0-20.0%, Ni: 8.0-12.0%
SUS316TP	C: ≤0.08%, Si: ≤1.00%, Mn: ≤2.00%, P: ≤0.045%, S: ≤0.030%, Cr: 16.0-18.0%, Ni: 10.0-14.0%, Mo: 2.0-3.0%
SUS316LTP	C: ≤0.03%, Si: ≤1.00%, Mn: ≤2.00%, P: ≤0.045%, S: ≤0.030%, Cr: 16.0-18.0%, Ni: 10.0-14.0%, Mo: 2.0-3.0%

JIS G3446 Mechanical Tube Mechanical Properties:

Grade	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)
SUS304TP	≥520	≥205	≥35
SUS304LTP	≥480	≥175	≥35
SUS316TP	≥520	≥205	≥35
SUS316LTP	≥480	≥175	≥35

JIS G3446 Mechanical Steel Tube Delivery Condition:

The tubes are typically delivered in the cold-drawn, bright-annealed, or polished condition.

JIS G3446 Mechanical Steel Tube Permissible Variations in Dimensions:

The permissible variations in dimensions are specified in the JIS G3446 standard and depend on the specific tube size and wall thickness. It includes tolerances for outer diameter, wall thickness, and length.

JIS G3446 Mechanical Steel Tube Advantages:

- High corrosion resistance due to the stainless steel composition

- Good mechanical properties, providing strength and durability

- Excellent heat resistance, making it suitable for high-temperature applications

- Wide range of sizes and thicknesses available

- Can be easily formed, welded, and machined

JIS G3446 Mechanical Tube Applications:

- Structural components in machinery and equipment

- Automotive parts, such as exhaust systems and structural frames

- Construction of buildings and infrastructure

- Industrial equipment and appliances

- Medical equipment and instruments