Innovations in boron steel for high-strength and cost-effective applications
Ovako has a history of pioneering the use of boron steel and over time has innovated its use and the wide range of variants we can provide today. Boron is a small interstitial element which is added to improve hardenability. It most effective in lower and medium carbon steels with < 0.40% C. Boron increases the strength of heat-treated steels in the quenched and tempered condition. Boron steel grades can be hot worked and direct quenched to achieve a high strength component. It is often a very cost-effective solution. Boron steels are often used in applications subjected to wear.
Why boron steel ensures safer, stronger, and more durable wrecking bars
As a company that places a premium on quality and end-user safety, Hultafors has been using Ovako high-alloy boron steel for the past 25 years to manufacture its wrecking bars. Lennart Jansson, Product Manager at Hultafors, says: “The claw of our wrecking bars is the thinnest on the market to enable easy access to narrow spaces." But because of boron steel’s ultra-high strength and durability, it will never break when over-stressed, making it much safer than other bars. It might bend slightly. In contrast, our competitors’ bars have much thicker claws, but can snap without warning, as revealed in our stress-testing program.
|
EN-standard |
Ovako |
Typical analysis |
||||||
|
|
|
C |
Si |
Mn |
Cr |
Mo |
Ni |
Other |
|
20MnB4 |
0.20 |
0.2 |
1.3 |
|
|
|
B |
|
|
22MnB5 |
0.24 |
0.3 |
1.3 |
0.2 |
|
|
B |
|
|
30MnB5 |
SB33M13B, BM 312 |
0.30 |
0.2 |
1.3 |
|
|
|
B |
|
43MnB5-3* |
0.42 |
0.3 |
1.4 |
|
|
|
B |
|
|
27MnCrB5-2 |
0.27 |
0.2 |
1.3 |
0.5 |
|
|
B |
|
|
33MnCrB5-2 |
0.32 |
0.3 |
1.3 |
0.6 |
|
|
B |
|
|
39MnCrB6-4 |
0.39 |
0.3 |
1.5 |
0.5 |
|
|
B |
|
EN-standard designation followed by “*” is not an official EN standard grade but named according to the rules in EN 10027.
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