JIS G3192 & JIS G3136 Standards
AGICO supplies Japanese H-beams which are primarily manufactured in accordance with 2 JIS standards:
- JIS G 3192: It is a Japanese Industrial Standard specifying the dimensions, mass, sectional properties, and tolerances of hot-rolled structural steel sections.
- JIS G 3136 specifies requirements for hot-rolled steels used for structural members of buildings.
These 2 standards clearly define requirements for dimensional accuracy, permissible tolerances, and surface quality for hot-rolled steel sections, including H-section steel. The technical framework has even influenced revisions of China’s GB/T 11263 national standard.
JIS G3192 H Beam Dimensions Chart
Equal Flange H Sections Size
| Nominal Size (mm) | h (mm) | b (mm) | tw (mm) | tf (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 100×100 | 100 | 100 | 6 | 8 | 16.9 |
| 125×125 | 125 | 125 | 6.5 | 9 | 23.6 |
| 150×150 | 150 | 150 | 7 | 10 | 31.1 |
| 175×175 | 175 | 175 | 7.5 | 11 | 40.4 |
| 200×200 | 200 | 200 | 8 | 12 | 49.9 |
| 250×250 | 250 | 250 | 9 | 14 | 71.8 |
| 300×300 | 300 | 300 | 10 | 15 | 93.0 |
| 350×350 | 350 | 350 | 12 | 19 | 134.9 |
| 400×400 | 400 | 400 | 13 | 21 | 171.7 |
Unequal Flange H Sections Size
| Nominal Size (mm) | h (mm) | b (mm) | tw (mm) | tf (mm) | Weight (kg/m) |
|---|---|---|---|---|---|
| 150×75 | 150 | 75 | 5 | 7 | 14.0 |
| 175×90 | 175 | 90 | 5 | 8 | 18.0 |
| 200×100 | 200 | 100 | 5.5 | 8 | 20.9 |
| 250×125 | 250 | 125 | 6 | 9 | 29.0 |
| 300×150 | 300 | 150 | 6.5 | 9 | 36.7 |
| 350×175 | 350 | 175 | 7 | 11 | 49.4 |
| 400×200 | 400 | 200 | 8 | 13 | 65.4 |
| 450×300 | 450 | 300 | 11 | 18 | 120.8 |
| 500×300 | 500 | 300 | 11 | 15 | 110.8 |
| 600×300 | 600 | 300 | 12 | 17 | 103.4 |
| 700×300 | 700 | 300 | 13 | 24 | 181.8 |
| 800×300 | 800 | 300 | 14 | 26 | 206.8 |
| 900×300 | 900 | 300 | 16 | 28 | 240.1 |
H Beam Material Series
Japanese standards have detailed classifications of H-beams into different series according to application scenarios, so customers can choose easily in order to meet specific performance requirements. The 2 most common series are:
SM Series (Steel for Welded Structures): H beam products of this series are suitable for structural applications requiring high welding performance, the application fields include bridges, ships, vehicles and heavy industrial structures. The H beams have the following features:
- Good tensile strength
- Excellent low-temperature impact toughness
- Superior weldability
SN Series (Steel for Building Structures): The H beams of SN series represent a higher quality grade specifically designed for seismic-resistant buildings. The steel has strict limitations on important parameters:
- Carbon equivalent (to ensure weldability)
- Yield-to-tensile strength ratio (to ensure ductile deformation capacity)
- Ultrasonic testing requirements (to ensure internal soundness)
These controls ensure safety and reliability of H-beams under extreme loads such as earthquakes.
Optimized Section Design of JIS H-Beams
More Section Design Option
Japanese H-beams adopt an independent and detailed dimensional system. Its dimension is slightly different compared with other nation standards. For example: For a 200 mm depth narrow-flange H-beam:
- Chinese standard may correspond to 200×200.
- Japanese standard offers multiple refined combinations, such as: 198×99, 194×150.
These multiple size options allow customers and engineers to select H-beam sections more precisely, with advantages such as optimizing cross-sectional area, improving the strength-to-weight ratio, reducing structural self-weight, and achieving material savings.
Strict Dimensional Tolerances
H section steel of Japanese standards specify detailed permissible deviations for flange straightness and curvature, edg rounding at flange tips and overall geometry. These strict tolerances for H beam production ensure the consistent appearance and high dimensional precision of the final product, and makes the later fabrication and installation easier.
H Beam Manufacturing – Steel Grade & Technology
Steel Grades: Japanese H-beams exported from AGICO are sourced from large steel mills in China with advanced steelmaking technologies to enhance their performance. Commonly used steel grades include SS400, SM490, SN490, etc. Compared with ordinary carbon steel, these steels provide improved strength, toughness, and weldability.
Thermo-Mechanical Control Process (TMCP): Steel mills hold many patents and technologies; one of the key technological advancements is TMCP (controlled rolling and controlled cooling).
Through TMCP, steel mill factories can produce H beams with:
- Higher strength H-beams (compressive design strength up to 385 MPa)
- Improved weldability
- Enhanced toughness
These high-performance H section steels are widely used in modern engineering projects such as super high-rise buildings.
JIS H Beam Application Fields
JIS H beams are produced with high dimensional accuracy, featuring high strength, superior seismic performance, excellent load-bearing capacity and optimized section efficiency, excellent weldability, and low-temperature toughness.
AGICO supplies Japanese standard H-beams suitable for structural applications, including:
- High-rise and Super High-rise Buildings
- Large-span Industrial Plants and Logistics Facilities
- Bridges, Tunnels, and Mining Supports
- Shipbuilding and Port Machinery
H Beams Available: AGICO also supplies a full-size range of JIS standard H beams, customized H beams and heavy-duty H beams, produced according to various national standards, such as Korean standard, American standard, European standard, Australian standard and British standard. If you are looking to buy H beams, send a free quote now!
