Products description details
1. Chemical Composition (%)
Q345A
C | Mn | Si | P | S | V | Nb | Ti |
≤0.20 | 1.00-1.60 | ≤0.55 | ≤0.045 | ≤0.045 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 |
Q345B
C | Mn | Si | P | S | V | Nb | Ti |
≤0.20 | 1.00-1.60 | ≤0.55 | ≤0.040 | ≤0.040 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 |
Q345C
C | Mn | Si | P | S | V | Nb | Ti | Al |
≤0.20 | 1.00-1.60 | ≤0.55 | ≤0.035 | ≤0.035 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | ≥0.015 |
Q345D
C | Mn | Si | P | S | V | Nb | Ti | Al |
≤0.18 | 1.00-1.60 | ≤0.55 | ≤0.030 | ≤0.030 | 0.02-0.15 | 0.015-0.060 | 0.02-0.20 | ≥0.015 |
Q345 steel round bar/ Grade50/ SPEC590/S355JR(1.0045)/S355JO(1.0553)
2. Mechanical Properties
Thickness/diameter(mm) | Tensile strength | Yield strength |
≤16 | 470MPa-630MPa | ≥345MPa |
>16-≤35 | ≥325MPa | |
>35-≤50 | ≥295MPa | |
>50-≤100 | ≥275MPa |
Q345 | Elongation rate | Impact Energy |
A | ≥21% | -- |
B | ≥21% | (+20°C) ≥34J |
C | ≥22% | (0°C)≥34J |
D | ≥22% | (-20°C)≥34J |
E | ≥22% | (-40°C)≥27J |
3. Standard
GB: Q345A/Q345B/Q345C/Q345D, ASTM: Grade50, JIS: SPEC590, EN: S355JR(1.0045)/S355JO(1.0553)
4. Specification
Dia: 10mm-200mm or according to your requirements
Length: 1m-12mm or according to your requirements
5. Delivery Condition
Hot rolled, forged, QT heat treatment and normalizing
6. Payment term
T/T, L/C or we can negotiate.
7. Delivery time
20days after the order confirmed
8. Characteristics
Q345 low-alloy high-tensile structural steel /Grade50/ SPEC590/S355JR(1.0045)/S355JO(1.0553)
1) Good comprehensive mechanical property.
2) Good weldability.
3) Good cold and hot processing property.
4) Good decay resistance.
9. Application
Q345 low-alloy high-tensile structural steel /Grade50/ SPEC590/S355JR(1.0045)/S355JO(1.0553)
Q345 low-alloy high-tensile structural steel /Grade50/ SPEC590/S355JR(1.0045)/S235JO(1.0553) is used for ships, boiler, pressure vessel, oil storage tank, bridge, power station equipment, hoisting and conveying machinery and other welding structural parts for heavy load.
10. Company profile
Henan Jianhui Construction Machinery Co., Ltd is located in the industrial area of Zhengzhou, Henan, China. Our company is an ISO9001:2000 certified company and has been continually awarded by the local government . We are a professional carbon steel, alloy steel, tool die steel, spring steel, bearing steel manufacturer in China. our main products include carbon steel round bars, alloy steel round bars, tool steel rounds and flats, spring steel rounds and flats, bearing steel round bars, gear steel round bars, etc. We have hot rolled round steel bars and forged round steel bars. Our products have been exported to all over of the world, such as Asia, South America, Middle East, Europe, Africa, etc.
