STYLE SWITCHER
Construction services offer tailored solutions to meet the unique needs and specifications of each project.
- +86 19906354188
- laixingsteel
- smlspipes@laixingsteel.com
Q235 cold rolled steel plate custom cutting - special for precision instruments
Q235 cold rolled steel plate custom cutting - special for precision instruments
National standard Q235 cold-rolled steel plate, thickness 0.5-3mm (tolerance ±0.01mm), surface clean no oxide, support laser/precision cutting (accuracy ±0.1mm), suitable for sensor bracket, micro mold and other high-precision parts, provide material
Production process
Q235 steel plate is mainly produced by hot rolling process, the specific process is as follows:
1.Raw material preparation: the billet (continuous casting billet or die casting billet) is heated to 1200-1250℃.
2.Roughing and finishing:
• Rough rolling stage: the billet is rolled to the middle thickness (30-50mm);
• Finishing rolling stage: Control the final rolling temperature at 850-900℃ to form the target thickness (1.5-200mm).
3.Cooling and winding: air-cooled or laminar cooling to room temperature, coil or cut into plates.
4.Surface treatment: pickling (to remove the oxide) or oil to prevent rust.
mechanical properties (GB/T 700 standard)
| argument | Value range/requirements | Test standard |
| Yield strength (Re) | ≥235 MPa | GB/T 228.1 |
| Tensile strength (Rm) | 375-500 MPa | GB/T 228.1 |
| Elongation after fracture (A) | ≥26%（thickness≤16mm） | GB/T 228.1 |
| Impact work (Akv) | ≥27J (20℃, V-notch) | GB/T 229 |
| Bending property | 180° cold bending without crack (d=1.5a) | GB/T 232 |
Implement standard control
| Standard system | Corresponding brand | Description of major differences |
| China Standard (GB) | Q235（GB/T 700） | It is divided into A/B/C/D four levels, and D level requires -20 ° C impact |
| American Standard (ASTM) | ASTM A36 | The carbon content is slightly higher (≤0.26%), and the Mn content is low |
| Japanese Standard (JIS) | SS400（JIS G3101） | Tensile strength ≥400 MPa, no yield strength requirements |
| European Standard (EN) | S235JR（EN 10025-2） | Requirements Cu≤0.55%, impact power 27J (+20℃) |
Chemical composition (GB/T 700 Q235B)
| element | c | si | mn | p | s |
| content | ≤0.22% | ≤0.35% | ≤1.40% | ≤0.045% | ≤0.045% |
Typical uses and application scenarios
1.Building structure
•Scene: Steel beams, stair steps, temporary supports
•Advantages: low cost, good weldability, suitable for static load structure
2.Machine building
•Scenario: Machine tool base, conveyor frame, and agricultural equipment shell
•Advantages: Easy machining, suitable for non-precision parts
3.Transportation
•Scenario: Floor of a freight car, corner parts of a container, and non-load-bearing partitions of a ship
•Limitations: Not suitable for high intensity or low temperature environments (need to be upgraded to Q345 or Q355)
4.Daily hardware
•Scenario: Inner lining of security door, shelf beam, common bolts and nuts.
•Advantages: Good cold forming performance, suitable for stamping processing.
Technical parameters and selection suggestions
| Parameter entry | Recommended range | Matters needing attention |
| Thickness selection | Building structure: 4-20mm | Cold rolled SPCC is preferred for ultra-thin sheet (<3mm) |
| Surface state | Pickling plate (indoor), galvanized plate (outdoor) | Galvanized layer ≥60g/m² (outdoor rust prevention) |
| Welding process | Manual arc welding (J422 electrode) | Preheating temperature ≥10℃ (plate thickness >20mm) |
| Alternative scheme | High strength demand →Q345 | Corrosion resistance demand →Q355NH weathering steel |
With its high cost performance, easy processing and wide applicability, Q235 steel has become a universal steel for basic industries around the world. But in the selection should pay attention to:
•Low temperature environment: Q235D (-20℃ impact power standard) should be selected;
•Dynamic load scenario: Q345 (yield strength 345MPa) is recommended.
•Corrosion environment: Use galvanized sheet or weathering steel (such as 09CuPCrNi-A).
Through reasonable matching standards and processes, the economic value of Q235 steel plate can be maximized.
Have An Upcoming Projects? Let’s Talk to Now!
Final Inspections, Occupancy Permits, And Project.
In the initial phases, architects and designers play a crucial role in conceptualizing and designing projects, ensuring they align with both aesthetic and functional requirements.
After price confirmed, FREE SAMPLE could be provided for your evaluation. After you confirm the sample details, the samples will be ready for delivery in 3-7days, and will be sent to you via express and arrive in 3-5days.1
Yes, our company mainly deals with wholesale deals, but if you insist buying one piece, or you just need one piece, we would be very likely to make the MOQ as 1 piece for you though.
Our company has been in Alibaba.com for 11 years, which is longer than most of our fellow suppliers, we've been golden suppliers for years. What's more, we've got quite a lot authority certificates, for example, BV, ISO9001, API, Alibaba onsite check cert