M&M Polishing Demonstrates A-2 Mirror-Like Surface Finish Capability

M&M Polishing has demonstrated its ability to polish Industeel SUPERPLAST® mold steel to an SPI A-2 finish, according to officials of the company.

M&M Polishing has demonstrated its ability to polish Industeel SUPERPLAST® mold steel to an SPI A-2 finish, according to officials of the company. M&M recently displayed a large sample of SP300 mold steel polished to the A-2 specification at NPE 2009 in Chicago this past June.

"We worked well with Industeel on this demonstration project," said David LaGrow, Vice President of M&M Polishing. "We were looking to demonstrate our A-2 polishing capabilities and they were willing to supply us with a block of SP300 to work with. The experience of our team of polishing experts was that we were able to use our standard techniques and equipment on SP300, and it took us no longer to get to an A-2 finish than it would take for any other type of steel," he said. "The bottom line for us is that our customers can feel confident in our ability to get a great finish when needed on SP300, just like we do on a regular basis with other types of steel," said LaGrow.

"M&M Polishing has done a lot of work for us over the years," said Tom Baker, Project Manager at Model Die & Mold, Inc. of Wyoming, MI. M&M does an excellent job, and they've done A-2 polishing work for us before. I'll definitely consider them for our next SP300 A-2 project. As for SP300, it's a good product. We think it compares well to P-20 mold steel, and I wouldn't hesitate to use it. When it comes to chrome-plated parts like wheel covers, the ability to quickly and consistently get that A-2 finish in the tool is absolutely critical," said Baker. "Any surface imperfection in the plastic wheel cover will be magnified when the chrome plating is applied," he added.

Our experience has been that when you get up to around an A-2 finish you can sometimes get in trouble with P20. The A-2 specification is virtually a mirror finish, but we think that SP300 works consistently well for that kind of finish," said Baker. "M&M's skill set with A-2 finishes for SP300 will definitely be of value to us."

SP300 is part of the Industeel (A Division of Arcelor Mittal) SUPERPLAST® product line of mold and tool steels. "SUPERPLAST® patented steels have been uniquely formulated for improved thermal conductivity, homogeneity, consistent polishability, welding performance and faster machining capability," said Rob Esling, Sales and Marketing Manager for Mold Steels at Industeel USA. "Companies like M&M Polishing have been able to prove to the industry that SUPERPLAST® grades have the ability to consistently polish up to the A-2 standard. In fact, Industeel warranties the entire SP product line of tool steels to an A-2 finish," he said.