Eigenschaften
Abmessung
| Property | Value |
|---|---|
Dimensions | Please feel free to check the figure on the right side of the material page for more details. |
Mechanisch
| Property | Value | Comment |
|---|---|---|
Dehnung | 8 % Show Supplier Material materials with Dehnung of 8 % | Quenched | 6 mm specimen in the rolling direction |
25 % Show Supplier Material materials with Dehnung of 25 % | Delivery condition | 6 mm specimen in the rolling direction | |
Härte, Rockwell C | 50 [-] Show Supplier Material materials with Härte, Rockwell C of 50 [-] | Quenched | 6 mm specimen in the rolling direction |
Streckgrenze | 440 MPa Show Supplier Material materials with Streckgrenze of 440 MPa | Delivery condition | 6 mm specimen in the rolling direction |
1200 MPa Show Supplier Material materials with Streckgrenze of 1200 MPa | Quenched | 6 mm specimen in the rolling direction | |
Zugfestigkeit | 660 MPa Show Supplier Material materials with Zugfestigkeit of 660 MPa | Delivery condition | 6 mm specimen in the rolling direction |
1700 MPa Show Supplier Material materials with Zugfestigkeit of 1700 MPa | Quenched | 6 mm specimen in the rolling direction |
Chemical properties
| Property | Value | Comment |
|---|---|---|
Aluminium | 0.02 % Show Supplier Material materials with Aluminium of 0.02 % | min. |
Bor | 0.001 - 0.004 % Show Supplier Material materials with Bor of 0.001 - 0.004 % | |
Kohlenstoff | 0.27 - 0.33 % Show Supplier Material materials with Kohlenstoff of 0.27 - 0.33 % | |
Mangan | 1.15 - 1.45 % Show Supplier Material materials with Mangan of 1.15 - 1.45 % | |
Phosphor | 0.025 % Show Supplier Material materials with Phosphor of 0.025 % | max. |
Schwefel | 0.004 % Show Supplier Material materials with Schwefel of 0.004 % | max. |
Silizium | 0.2 - 0.3 % Show Supplier Material materials with Silizium of 0.2 - 0.3 % | |
Titan | 0.02 - 0.05 % Show Supplier Material materials with Titan of 0.02 - 0.05 % |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Quenchable boron steel is used in applications requiring good wear resistant properties. The main applications for these steel grades after heat treatment are agricultural machinery (discs, plough shares), machinery for public works and mining, cutting equipment, tubes for automotive safety parts etc. A popular application for untreated steel is concrete mixer drums. | |
| Chemical composition | This grade receives a globularisation treatment of the manganese sulphides. The efficiency of boron is ensured by the addition of elements that bind nitrogen. | |
| Delivery condtion | In spite of their moderate hardness and mechanical properties, boron grades exhibit remarkably good abrasion resistance in their delivery condition, thanks to their composite microstructure consisting of a hard pearlite phase embedded in ferrite. They are therefore very cost-effective solutions for applications requiring good abrasion resistance. | |
| Heat Treatment | The recommended austenitising temperature is 830°C to 850°C. The temperature at the beginning of the quenching process (i.e. at the maximum cooling rate) is 730°C. The TRC diagrams are available on request. After heat treatment Its extreme hardness after heat treatment makes this grade particularly suitable for applications requiring high wear/abrasion resistance. Its use allows significant weight saving (up to 50% compared with an HSLA grade) in structural and automotive components. The specific advantage of ArcelorMittal quenchable boron steels is their suitability for water quenching, making the process more environmentally friendly (less effluent treatment) than that used for conventional carbon steels. Their hardening performance is excellent with both liquid and gas quenching. | |
| Other | The fatigue resistance of ArcelorMittal's boron quenchable steels is between 40 and 60% higher than S355MC AM FCE low alloy grade. It can be reduced by over 30% if total decarburisation is carried out. | |
| Processing methods | Forming This grade can be hot or cold formed. | |
| Surface condition | This boron grade is available in A unexposed surface quality only. | |