Allegheny Technologies and the United Steelworkers reached a tentative agreement for a labor contract late last week.
It's the next step toward ending the strike that has kept 1,300 steelworkers off the job since March 30.
The deal comes after negotiations that hit frequent snags over three months, especially over healthcare.
"Thursday morning, we made some progress where we started to get to the point where we were banging out most of the major issues," said USW contract coordinator Walt Hill.
Hill says USW is satisfied with the agreement, but now it goes to the members for ratification.
"We're not there yet," he said. "The members haven't seen the contract, and we're going to do that over the next couple of days, but we're hopeful we can put an end to this."
Workers will remain on strike until an agreement is ratified.
In a statement, ATI says the agreement also satisfied its key goals in negotiations, including controlling its exposure to future healthcare cost inflation.
"The efforts of both parties have resulted in a tentative agreement that rewards our hard-working employees and contributes to the long-term viability of ATI," said Kim Fields, executive vice president of Advanced Alloys & Solutions and High Performance Materials & Components. "This enables stability for our employees, our customers, and our business."