JIS A5525
JIS A5525 Steel Pipe
JIS A5525 is a renowned Japanese Industrial Standard that meticulously outlines the specifications for single pipes of welded steel pipe piles. These piles, commonly referred to as “piles,” play a pivotal role in forming the foundation of various structures, ranging from civil engineering works to intricate architectures. Notably, these piles are also instrumental in landslide prevention. The standard predominantly caters to a dimensional range of 318.5 mm to 2,000 mm in outside diameter. As a client of UNIACERO, you can rest assured that our products adhere to this standard, ensuring the highest quality and reliability for your projects.
JIS A5525 Specification
Our steel pipes, compliant with JIS A5525, come with a comprehensive specification that encompasses dimensions, production procedures, steel grades, surface coatings, end types, joint methods, and a plethora of machining services. When you choose our products, you’re not just purchasing steel pipes; you’re investing in a legacy of excellence, precision, and commitment to international standards.
| Standard | JIS A5525 | |||||
| Dimension | 318.5-2000mm | |||||
| Thickness | 3.2-25.4mm | |||||
| Pipe length | 3-18mm | |||||
| Manufacturing | Welded | |||||
| Steel Grade | SKK400 | |||||
| SKK490 | ||||||
| Application | Specifies the welded steel pipe piles, used in the foundation of structures such as civil engineering works and architecture. | |||||
| Chemical Component | C | Si | Mn | P | S | |
| SKK400 | ≤0.25 | — | — | ≤0.04 | ≤0.04 | |
| SKK490 | ≤0.18 | ≤0.55 | ≤1.65 | ≤0.035 | ≤0.035 | |
| Mechanical properties | – | Tensile strength | Yield strength | Elongation,% | – | – |
| SKK400 | ≥400 Mpa | ≥235 Mpa | ≥18 | |||
| SKK490 | ≥490 Mpa | ≥315 Mpa | ≥18 | |||
JIS A5525 Dimension Table
The dimensional range of our steel pipes, as per JIS A5525, starts from an outside diameter of 318.5 mm and extends up to 2,000 mm. This extensive range ensures that you, our esteemed client, have a plethora of options to choose from, catering to the diverse requirements of your projects.
| Outside Diameter mm | Nominal Wall Thickness mm | |||
|---|---|---|---|---|
| 318.5 | 6.9 | 10.3 | – | – |
| 355.6 | 6.4 | 7.9 | 11.1 | – |
| 400 | 9 | 12 | – | – |
| 406.4 | 9 | 12 | – | – |
| 500 | 9 | 12 | 14 | – |
| 508 | 9 | 12 | 14 | – |
| 600 | 9 | 12 | 14 | 16 |
| 609.6 | 9 | 12 | 14 | 16 |
| 700 | 9 | 12 | 14 | 16 |
| 711.2 | 9 | 12 | 14 | 16 |
| 800 | 9 | 12 | 14 | 16 |
| 812.8 | 9 | 12 | 14 | 16 |
| 900 | 12 | 14 | 16 | 19 |
| 914.4 | 12 | 14 | 16 | 19 |
| 1000 | 12 | 14 | 16 | 19 |
| 1016 | 12 | 14 | 16 | 19 |
| 1100 | 12 | 14 | 16 | 19 |
| 1117.6 | 12 | 14 | 16 | 19 |
| 1200 | 14 | 16 | 19 | 22 |
| 1219.2 | 14 | 16 | 19 | 22 |
| 1300 | 14 | 16 | 19 | 22 |
| 1320.8 | 14 | 16 | 19 | 22 |
| 1400 | 14 | 16 | 19 | 22 |
| 1422.4 | 14 | 16 | 19 | 22 |
| 1500 | 16 | 19 | 22 | 25 |
| 1524 | 16 | 19 | 22 | 25 |
| 1600 | 16 | 19 | 22 | 25 |
| 1625.6 | 16 | 19 | 22 | 25 |
| 1800 | 19 | 22 | 25 | – |
| 2000 | 22 | 25 | – | – |
Chemical Requirements of JIS A5525
The chemical composition of our steel pipes is meticulously crafted to align with JIS A5525. This ensures that the pipes you receive are of the highest quality, offering unparalleled strength and durability for your construction needs.
| Class Symbol | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| SKK400 | 0.25 max. | – | – | 0.040 max. | 0.040 max. |
| SKK490 | 0.18 max. | 0.55 max. | 1.65 max. | 0.035 max. | 0.035 max. |
| Alloy elements other than those in this table may be added，as required. | |||||
Mechanical Requirements of JIS A5525
In line with JIS A5525, the mechanical properties of our steel pipes are optimized to provide maximum strength, flexibility, and resilience. When you opt for our products, you’re choosing materials that can withstand the test of time and the harshest of conditions.
| Class Symbol | Tensile Strength N/mm2 | Yield Point or Proof Stress N/mm2 | Elongation % | Tensile Strength of weld N/mm2 | Flattening Resistance Distance Between Flat Plates(H) (D)is Outside Diameter of Pipe |
|---|---|---|---|---|---|
| SKK400 | 400 min. | 235 min. | 18 min. | 400 min. | 2/3 D |
| SKK490 | 490 min. | 315 min. | 18 min. | 490 min. | 7/8 D |
| NOTE: 1 N/mm2 – 1 MPa | |||||
Steel Grades in JIS A5525
We offer steel pipes in two primary grades: SKK400 (SKK41) and SKK490 (SKK50). Each grade is tailored to meet specific structural requirements, ensuring that you always have the right material for the right job.
- SKK400
- SKK490
Production Tolerance ofJIS A5525
| Table 5 Shape and dimensional tolerances of single pipe | ||||
|---|---|---|---|---|
| Division | Tolerance | Definition of symbol | ||
| Outsidediameter(D) | Pipe end | ±0.5% | Tolerance on outside diameter applies to the measured circumference of the pipe. Conversion between outside diameter (D)and pipe cireumference (i) is given bythe follawing: Where， D: outside diameter (mm): l:circumference (mm ) π:3.1416 | |
| Wallthickess(t) | Wall thickness under 16 mm | Outaide diameter under 500 mm | + Not specified – 0.6mm | – |
| Outside diameter 500 mm or over to and exel.800 mm | + Not specified – 0.7mm | |||
| Outside diameter 800 mm or over up to and incl.2 000 mm | + Not specified – 0.8mm | |||
| Wall thickness16 mm or over | Outside diameter under 800 mm | + Not specified – 0.8mm | ||
| Outaide diameter 800 mm or over up to and incl.2 000 mm | + Not specified – 1mm | |||
