Old timer told me to stop pouring my molds too cold, I finally listened

I used to always pour around 2450 because I was scared of gas porosity. Then a retired guy at our shop in Cleveland said that was why my thin sections kept freezing off before filling. He showed me a test bar he poured at 2600 and the detail was way sharper. Now I run my iron hotter and my scrap rate dropped like 15% in two weeks. Anyone else get told they're pouring too cold and it changed their castings?

2 comments

2 Comments

ivan4026d ago

That old timer probably saved you a ton of headache. I had a similar thing happen when I started casting brass fittings. A guy walking by my station told me my pour was sluggish and to bump it up by 100 degrees. I was worried about the same thing with gas, but he was right. The metal flowed way better into the narrow parts and I quit fighting with short pours on every other casting.

the_river26d ago

Wait what, he just walked by and eyeballed your pour and knew the temp was off by exactly 100 degrees? That's wild honestly, like how do you develop that kind of instinct unless you've ruined a thousand castings yourself. Ngl that kind of experience is basically impossible to buy or learn from a book.