A friend made me a gift, a machined hammer head, made of Uddeholm Hotvar steel, which I finished, heat-treated and made a handle for.
Its 4.3cm wide, 13cm long, with a 34cm handle made of an old oak plank. Weight of hammer head is 1310gr, and together with the handle 1490gr. Perfect!
What was particularly interesting was the heat-treatment. Heat up to
roughly 1000C, quench the first 5cm in soapy, warm water for 30 sec, and
then let the heat of the remaining piece dissipate and do the tempering.