Boron Content of 10B21
Boron Content of 10B21
(OP)
What is the minimum boron content for 10B21 that will give consistent hardness of 28-32 Rc after heat treat?
Thanks
Thanks
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RE: Boron Content of 10B21
RE: Boron Content of 10B21
RE: Boron Content of 10B21
RE: Boron Content of 10B21
What is the concentration of Ti and N? B can be rendered ineffective if the N is not tied up by Ti. Was the steel Al-killed (Al > 0.015%)? As swall mentioned, B can be effective in hardening fasteners in concentrations as low as 0.0005% by mass, although it is more commonly limited to 0.0008-0.0030% along with a minimum Ti content of 0.01%.
RE: Boron Content of 10B21
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Corrosion, every where, all the time.
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