24 July 2021 High Strength Steel Sheet(HSLA)
S960QL High Strength Steel Plate
S960QL high strength steel is with yield strength between 590Mpa and 960MPa, because of its good welding performance: welding test results show that the -40°C V-type impact of the weld and the fusion line is greater than 60J, and it is widely used in manufacturing 100 Mine truck floor, pumping machinery, excavators, truck cranes, crawler cranes, coal mine hydraulic supports, etc.
Due to the nature of the material it is used extensively in the heavy transport, lifting and mining industry, where huge payloads and risk of material deterioration through excessive abrasion is commonplace. Produced in accordance with EN10025:6:2004, S890QL has good bending and welding capabilities. Please refer to the technical details below referring to S890QL.
Grade Designation
- S = Structural Steel
- 960 = minimum yield strength (MPa)
- Q = Quenching & Tempering
- L = Low notch toughness testing temperature
Chemical Composition of S960QL
| Chemical Element | Content Weight % |
|---|---|
| C | 0.20 |
| Si | 0.80 |
| Mn | 1.70 |
| P | 0.020 |
| S | 0.010 |
| N | 0.015 |
| B | 0.0050 |
| Cr | 1.50 |
| Cu | 0.50 |
| Mo | 0.70 |
| Nb | 0.06 |
| Ni | 2.0 |
| Ti | 0.05 |
| V | 0.12 |
| Zr | 0.15 |
Mechanical properties
| Specification (mm) | Re (Mpa) | Rm (Mpa) | A (%) | Impact temperature (℃) | ACP (J) | Cold bending d=3a | ||
|---|---|---|---|---|---|---|---|---|
| 20 | 1010 | 1070 | 14.5 | －40℃ | 52 | 63 | 41 | good |
| 20 | 1000 | 1060 | 16 | －40℃ | 46 | 40 | 46 | good |
| 25 | 995 | 1050 | 16 | －40℃ | 76 | 53 | 61 | good |
| 25 | 1000 | 1050 | 15.5 | －40℃ | 66 | 55 | 63 | good |
| 25 | 1000 | 1060 | 15 | －40℃ | 66 | 74 | 46 | good |
| 50 | 975 | 1030 | 16 | －40℃ | 60 | 65 | 63 | good |
Welding test results
| Sample serial number | Steel plate thickness (mm) | Stretching test | Bending test | Impact test | |||
|---|---|---|---|---|---|---|---|
| Rm (Mpa) | fracture Location | Side bend | Notch position | Gap form | -40 ℃ AKV (J) | ||
| E960-1 | 16 | 960 | Weld | intact | Weld Center | V | 62 61 60 |
| E960-2 | 16 | 920 | Weld | intact | Fusion line +1.5 | V | 67 75 71 |
Recommended welding process for quenched and tempered
| Steel grade | Welding method | Recommended welding consumables | pre-heat temperature (℃) | Interlayer temperature (℃) | Electrode (wire) diameter （mm） | Welding process parameters | |||
|---|---|---|---|---|---|---|---|---|---|
| welding Current （A） | welding Voltage （V） | Welding speed （cm/min） | Line energy （KJ / cm2 | ||||||
| 960MPa | Electrode arc welding (SMAW) | J107RH Ok75.78 | 100-150 | ≥100 | φ4.0 | 170 | 25 | 15 | 20 |
| Gas Shielded Welding (GMAW) | Union X90 | 100-150 | ≥100 | φ1.2 | 240 | 30 | 30 | 15 | |
Application:
General construction and various engineering machinery, such as drilling rigs, electric shovel, electric wheel dump trucks, mining trucks, excavators, loaders, bulldozers, various cranes, coal mine hydraulic supports and other mechanical equipment and Other structural parts.