Characteristics Of Q355
In addition to performance, Q355 has particular elements that prevent atmospheric corrosion. Since it is mild steel, it has a lower carbon content. If more carbon were added to the alloy, it would be reclassified as a cast iron.
Q355 is a newer Chinese steel grade that was designed to replace Q345. Its material density is 7.85 g/cm3 and possesses three quality levels, including Q355B, Q355C, and Q355D. It has great mechanical and hot and cold process properties. In contrast, it has better and more improved mechanical properties when compared to A36 ASTM steel.
Uses Of Q355
Q355 steel has excellent mechanical properties, great weldability, and ample corrosion resistance. It can be utilized to manufacture and produce petroleum storage tanks, high-pressure vessels, boilers, ships, power stations, and many other high-load structural parts. Q355 is also widely used to make shipping containers, waste storage containers, weather containers, offshore containers, workshop containers, and toolboxes.
If you need steel that is created to stand up to the needs of construction and engineering components that provide excellent weldability and toughness, then Q355 may be a strong contender for your next project or job.
Q355 Physical Properties
| Physical Properties | Metric | US/Imperial |
|---|---|---|
| Density | 7.80 g/cc | 0.282 lb/in³ |
Mechanical properties Q355 steel
| Mechanical Properties | Metric | US/Imperial |
|---|---|---|
| Hardness, Brinell | 135 | 135 |
| Hardness, Rockwell B | 74 | 74 |
| Tensile Strength, Ultimate | 450 MPa | – |
| Tensile Strength, Yield | 345 MPa | – |
| Elongation at Break | 18 % | 18 % |
| 21 % | 21 % | |
| Bulk Modulus | 160 GPa | 23200 ksi |
| Shear Modulus | 80.0 GPa | 11600 ksi |
Q355 steel has good mechanical properties, good weldability, hot and cold processing properties and corrosion resistance.
Component elements properties of Q355 steel
| Component Elements Properties | Metric | US/Imperial |
|---|---|---|
| Carbon, C | <= 0.23 % | <= 0.23 % |
| Iron, Fe | 0.98 | 0.98 |
| Manganese, Mn | 0.0135 | 0.0135 |
| Phosphorus, P | <= 0.040 % | <= 0.040 % |
| Silicon, Si | <= 0.40 % | <= 0.40 % |
| Sulfur, S | <= 0.050 % | <= 0.050 % |
| Silicon, Si | 0.15 – 0.40 % | 0.15 – 0.40 % |
| Sulfur, S | 0.0005 | 0.0005 |
Q355 steel is a Chinese structural steel, material density: 7.85 g/cm3. Q355B, Q355C, Q355D, properties, chemical composition are equivalent to European EN.
The recent release of the new GB/T 1591-2018 standard has caused a lot of heated discussion. Will it form an interoperability with the European standard S355 series? Do you want to increase the amount of alloy added like the new national standard for rebar? Will not cause another alloy to turn 10 times the price?
As we all know, China's steel production is the largest variety of rebar, followed by steel plate and sheet, and the largest percent of steel grade produced in the plate is Q235B, followed by Q345B. The biggest impact of the new GB/T 1591-2018 release is Q345B, because the output of other grades has little effect. According to what we said above, this change is in line with international standards. It can be told from the brand name, it is obviously in line with the European standard. Although it is based on ISO, in essence, in international trade, the S355JR steel plate production quantity is just like Q345B in China.
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