
Grade C Square Steel Pipes
In the manufacturing process of Grade C Square Steel, the following key process parameters should be meticulously controlled to ensure performance:
Chemical Composition: Adhere to strict limits for carbon, manganese, phosphorus, and sulfur to achieve the desired strength and ductility.
Thermal Treatment: Proper heat treatment, such as normalization or quenching and tempering, to refine the microstructure and enhance mechanical properties.
Rolling Precision: Control rolling temperatures and pressures to ensure accurate dimensions and surface finish, avoiding defects like scale or cracks.
Cooling Rates: Manage cooling after rolling to control the hardening process and achieve the right balance of hardness and toughness.
Non-Destructive Testing (NDT): Utilize NDT methods like ultrasonic or magnetic particle inspection to detect internal flaws.
Mechanical Testing: Conduct tensile and impact tests to verify the steel's strength, ductility, and resistance to fracture.
Surface Quality: Ensure a smooth, clean surface finish to prevent corrosion and facilitate subsequent processing or coating.
Quality Assurance: Implement comprehensive quality control measures to monitor and document compliance with specifications throughout production.
|
Name of product |
Size |
Wall thickness |
|
Square tubes
|
20*20 |
1.3-2.5 |
|
25*25 |
1.3-2.75 |
|
|
30*30 |
1.3-2.75 |
|
|
40*40 |
1.3-3.75 |
|
|
50*50 |
1.3-5.75 |
|
|
60*60 |
1.3-5.75 |
|
|
70*70 |
1.3-5.75 |

FAQ
Q1: What's your terms of payment?
A: 30%T/T as the upfront deposit, 70% before delivery, We will show you the photos and package before you pay the balance.
Q2: What's the terms of delivery?
A: EXW, FOB, CFR, CIF
Q3: What's the terms of packing?
A: Generally,we pack our goods in bundles or coils with rods or belts, we could also pack the goods as the customers' requirement.
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