Heavy Steel Plate Custom Flame & Laser Cutting in Japan | Kumagai Specialty Steel
Precision CNC flame cutting for heavy steel plates (up to 100mm+) in Nagoya, Japan. Processing SS400, High Tensile steel, ABREX, COR-TEN with exact tolerances. Get a free quote from your CAD drawings. Established in 1913, Japan’s trusted special steel supplier and processor
目次
Do You Have These Challenges with Thick Plate and Specialty Steel Cutting?
- Are you struggling to find a supplier capable of cutting thick steel plates of 70 mm or more?
- Are heat distortion and notches from gas cutting causing significant rework in downstream processes?
- Are you currently sourcing steel materials and arranging cutting separately, resulting in higher management costs and longer lead times?
- Do you want to work with a company that has proven expertise in processing wear-resistant steel such as ABREX, as well as high-tensile steel?
Kumagai Specialty Steel, founded in 1913, solves these challenges through a combination of in-house inventory, advanced cutting equipment, and skilled NC gas cutting technology.
Gas Cutting and Thermal Cutting Capabilities at Kumagai Specialty Steel
Main Materials We Handle
- Rolled steel for general structures: SS400 (JIS Standard), etc.
- Carbon steel for machine structural use: S45C, S48C, S50C, S55C (JIS Standard), etc.
- Rolled steel for welded structures: SM490A, SM490B, SM570 (JIS Standard), etc.
- High-tensile steel plates: WEL-TEN590, WEL-TEN780, etc.
- Wear-resistant steel plates: ABREX, HARDOX, etc.
- Weather-resistant steel plates: COR-TEN steel, etc.
- Sulfuric acid and hydrochloric acid dew-point corrosion-resistant steel plates: S-TEN1, S-TEN2
- Boiler steel plates: SB410 (JIS Standard), etc.
- Impact and abrasion-resistant steel plates: NM-13MN
We also have cutting experience with many other specialty materials.
Cutting Equipment and Processing Specifications
| Category | Detailed Specifications | Notes |
|---|---|---|
| Supported Thickness (t) | 1.6 mm – 100mm+ (Based on recent 1-year track record) |
Laser or plasma cutting is generally used up to 40mm. Flame cutting is applied for thicker materials. |
| Max. Cutting Dimensions | Width x Length = 2350 mm x 6200 mm (Cutting from raw material) |
2350mm x 6200mm is the maximum size of our stocked raw materials. Our equipment is capable of handling even larger base materials. |
| Equipment | 3 Fiber Laser Cutting Machines (20kW, 8kW, 3kW) |
Dedicated to thicknesses from 1.6mm to 40mm. |
| 1 CO2 Laser Cutting Machine | Dedicated to thicknesses from 1.6mm to 16mm. | |
| 2 Plasma Cutting Machines | Dedicated to thicknesses from 4.5mm to 36mm. | |
| 1 Hydrogen CNC Flame Cutting Machine | Dedicated to 36mm and above. 6-torch system. | |
| 4 Propane CNC Flame Cutting Machines | Dedicated to 25mm and above. Up to 12-torch system. | |
| 1 Robotic Arm Hydrogen Flame Beveling Machine | Handles complex and circular beveling. | |
| 5 Portable Flame Cutting Machines | Used for standard beveling. | |
| Supported Data Formats | DXF, PDF, Hand-drawn sketches, FAX | We offer highly flexible support for all drawing types. |
Cutting Tolerance Control Table
The following tables show the cutting tolerances generally managed in-house. For complex shapes, long and narrow products, or other special requirements, tolerances will be determined through mutual consultation. Please confirm the required cutting tolerances at the quotation stage.
※）Laser Cutting Tolerance Table
|
Length (L) Thickness (t) |
L ≤ 100 | 100 < L ≤ 300 | 300 < L ≤ 600 | 600 < L ≤ 1000 | 1000 < L ≤ 3000 |
|---|---|---|---|---|---|
| t ≤ 2.0 | ±0.5 | ±0.7 | ±1.0 | ±1.2 | ±1.5 |
| 2.0 < t ≤ 4.5 | ±1.0 | ±1.2 | ±1.5 | ±1.7 | |
| 4.5 < t ≤ 16 | ±1.2 | ±1.5 | ±1.7 | ±2.0 |
* Length (L), thickness (t), and tolerances are measured in mm.
* The values listed above represent standard laser cutting tolerance guidelines. Actual processing tolerances vary depending on product shape and steel grade (e.g., High Tensile Steel, Special Steel). Please contact us directly for specific precision requirements and CAD quotes.
※）Gas Cutting Tolerance Table
|
Length (L) Thickness (t) |
L ≤ 100 | 100 < L ≤ 300 | 300 < L ≤ 600 | 600 < L ≤ 1000 | 1000 < L ≤ 3000 |
|---|---|---|---|---|---|
| t ≤ 16 | ±1.0 | ±1.5 | ±2.0 | ±2.0 | ±2.5 |
| 16 < t ≤ 25 | |||||
| 25 < t ≤ 50 | ±2.5 | ±2.5 | ±3.0 | ||
| 50 < t ≤ 100 | |||||
| 100 < t ≤ 150 |
* Length (L), thickness (t), and tolerances are measured in mm.
* The values listed above represent standard guidelines for CNC flame cutting (gas cutting). For thermal distortion control on heavy plates or custom shape precision, feel free to contact us with your CAD drawings.
※）Notes
When materials with a plate thickness of 16 mm or more are cut by laser, the gas cutting tolerance for the corresponding plate thickness applies.
For plasma cutting, tolerances are generally applied based on the laser cutting or gas cutting tolerance standards according to plate thickness.
From Material Sourcing to Processing: Kumagai Specialty Steel’s One-Stop Service
Strength 1: Fast Delivery Supported by Extensive In-House Inventory
As a steel supplier handling specialty steels, we help customers avoid delays caused by material sourcing. We can also reliably provide mill sheets, or steel inspection certificates.
Strength 2: Integrated Beveling and CNC Machining Services
Beyond cutting, Kumagai Specialty Steel provides integrated value-added processing, including bevel cutting and CNC machining. By offering these services through a single source, we help customers reduce supplier management, simplify procurement, shorten lead times, and improve overall production efficiency.
Strength 3:Safe & Seamless Global Delivery (CIF Terms)
As a rule, we ship under CIF terms, partnering with top-tier international logistics providers to deliver your steel safely worldwide.
Actual Gas Cutting of Extra-Thick Steel Plates
For Thick Plate Gas Cutting and Steel Processing, Trust Kumagai Specialty Steel Since 1913
Whether you need JIS steel materials, gas cutting, laser cutting, plasma cutting, or value-added machining services, Kumagai Specialty Steel is ready to support your project.
Our experienced team will respond promptly to your inquiries and provide the most suitable solution based on your requirements.
For international customers, we generally handle exports under CIF (Cost, Insurance and Freight) terms, ensuring a smooth and reliable procurement process from Japan.