Complaint
High-strength steel plate products are widely used in all kinds of engineering machinery, such as mining and all kinds of engineering construction with drilling rigs, electric shovels, electric wheeled bucket trucks, mining cars, excavators, loaders, bulldozers, all kinds of cranes, coal mines, such as hydraulic supports and other mechanical equipment and other structural parts.
| Grade | characterization | appliance |
| Q295 | Steel contains only a very small amount of alloying elements, the strength is not high, but has good plasticity, cold bending, welding and corrosion resistance properties | Building structures, industrial plants, low-pressure boilers, low and medium-pressure chemical containers, oil tanks, pipelines, cranes, tractors, vehicles and general engineering structures that do not require high strength. |
| Q345 | Comprehensive mechanical properties, weldability, cold, hot working properties and corrosion resistance are good, c, D, E-grade steel with good low-temperature toughness | Ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting and transportation machinery and other higher loads of welded structural components |
| Q420 | High strength, especially in the normalized or normalized and tempered state has high comprehensive mechanical properties | Large ships, bridges, power station equipment, medium- and high-pressure boilers, high-pressure vessels, rolling stock, cranes, mining machinery and other large-scale welded structural components |
| Q460 | Strength High, in the normalized, normalized and tempered or quenched and tempered state has a very high overall mechanical properties, all with aluminum supplement deoxidation, the quality of the grade C, D, E, can ensure that the steel's good toughness | Alternate grades of steel, used in various large engineering structures and light structures requiring high strength and high load. |
| Steel plate type | |||||||||
| S420ML | Q500D | A572MGr.42 | StE380 | HG785E | Q500E | 1.8941 | Q960D | A572MGr.60 | Grade50 |
| S460M | WDB620 | A633MGr.E | S355K2G3 | Q500 | S500QL | 1.8974 | HG60C | A572MGr.65 | Grade42 |
| Q785D | HG980 | Q420A | S355JR | BS700MC | S500QL1 | 1.8976 | HG60D | a572gr70 | Grade415 |
| Q785D | SM520 | Q420B | S355J2G4 | S890Q | 1.005 | 1.8983 | HG60E | Fe510D | Grade345 |
| S690Q | S550Q | Q420C | S690QL1 | S690QL | 1.006 | 1.8984 | HG70C | S355JO | Grade290 |
| S355ML | Q890E | Fe510C | Q420 | S960Q | 1.0114 | HJ58E | HG70D | E295 | E420E |
| BSM590 | Q345A | 50A | S890QL | 34CrNi3Mo | 1.8838 | HQ600MC | HG980D | S420N | SQ420MCC |
| Q890QL | Q345C | E460EE | t700 | Q550 | 1.8903 | HQ700MC | HG980E | S620QL | TQ420 |
| Q960 | SM490B | SM570 | Gy5 | Q460B | 1.8904 | 12Mn | q890 | S620QL | A633MGr.C |
| Q620 | SM490E | S355K2G4 | HG785 | Q420E | 1.8909 | 14MnNb | q590d | S620QL1 | A633MGr.50 |
| Q690D | SM490E | SN490B | Q620D | Q460A | 1.8914 | 15MnVN | q590e | Q620E | BR290 |
| SM490A | 55C | A572 | Q345E | Q460D | 1.8924 | 1524 | db685 | Q620qE | SuperElso 960 |
| Q550D | Fe430B | E420DD | HG70E | Q460C | 1.8925 | Q550E | Q295A | Q620qD | Fe510B |
| Q460E | E355DQ | 43B | S500Q | Q390A | 1.8926 | Q550C | Q295B | C1010 | E460DD |
| Q420D | E355E | 43B | HG70 | Q390C | 1.8927 | Q550B | WL700 | Type8Grade80 | E460CC |
| HG785D | St44-3 | 50C | HG60 | Q390D | 1.8928 | Q960D | A709M-HPS485W | Grade380 | SCP10 |
| HG785D | S460N | St52-3 | BS700MCK2 | Q390E | 1.8931 | HG60C | 41CrAlMo74 | Grade55 | HJ58C |
| S960QL | SM520B | St52-3 | BWELDY960QL | Q690E | 1.8933 | HG60D | 4137 | Grade450 | HJ58D |
Grade | level |
chemical composition
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| C ≤ | Mn | Si ≤ | P ≤ | S ≤ | V | Nb | Ti | A1 ≥ | Cr ≤ | Ni ≤ | ||
| Q295 | A | O.16 | 0.80~1.50 | 0.55 | 0.045 | 0.045 | 0.02~O.15 | 0.015~O.060 | O.02~0.20 |
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| B | 0.040 | O.040 |
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| Q345 | A | O.20 | 1.00~1.60 | 0.55 | 0.045 | O.045 | 0.02~O.15 | 0.015~O.060 | 0.02~O.20 |
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| B | O.040 | O.040 |
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| C | 0.035 | 0.035 | O.015 |
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| D | O.18 | 0.030 | O.030 | O.015 |
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| E | 0.025 | O.025 | O.015 |
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| Q390 | A | 0.20 | 1.00~1.60 | O.55 | 0.045 | 0.045 | O.02~O.20 | O.015~ 0.060 | O.02~O.20 |
| O.30 | 0.70 |
| B | O.040 | O.040 |
| O.30 | O.70 | |||||||
| C | O.035 | O.035 | O.015 | 0.30 | O.70 | |||||||
| D | O.030 | 0.030 | 0.015 | O.30 | 0.70 | |||||||
| E | 0.025 | O.025 | O.015 | O.30 | 0.70 | |||||||
| Q420 | A | O.20 | 1.00~1.70 | O.55 | O.045 | O.045 | O.02~0.20 | O.015~0.060 | 0.02~O.20 |
| O.40 | O.70 |
| B | 0.040 | O.040 |
| O.40 | O.70 | |||||||
| C | O.035 | O.035 | 0.015 | 0.40 | O.70 | |||||||
| D | O.030 | 0.030 | 0.015 | O.40 | O.70 | |||||||
| E | 0.025 | 0.025 | 0.015 | O.40 | O.70 | |||||||
| Q460 | C | O.20 | 1.00~1.70 | O.55 | 0.035 | 0.035 | 0.02~0.20 | 0.015~O.060 | 0.02~O.20 | O.015 | O.70 | 0.70 |
| D | O.030 | 0.030 | 0.015 | 0.70 | 0.70 | |||||||
| E | 0.025 | O.025 | O.015 | 0.70 | 0.70 | |||||||