Jul 26, 2016

A new ASTM specification will help manufacturers optimize and expand the use of high-silicon molybdenum iron (SiMo) castings, which are used in high-temperature car parts such as exhaust systems and turbocharger housings. These castings are also used for components of power plants.

"This standard helps produce lighter, more heat-resistant and more consistent iron castings for auto and related industry applications," says ASTM member Delin Li, research scientist, CanmetMATERIALS, a branch of Natural Resources Canada. He says that iron casting manufacturers and automotive original equipment manufacturers will be the primary users of the standard.

The standard (A1095, Specification for High Silicon Molybdenum Ferritic Iron Castings) covers process, design and heat resistance of SiMo castings. It includes spheroidal and compacted graphite microstructures as well as a new type of iron mixed graphite.

"The mixed graphite microstructure introduced in the standard could offer a game-changing opportunity for producing cast iron engine cylinder blocks, head, liners, brakes and exhaust components," says Li. "This could benefit the entire metalcasting and automotive industries."

To purchase standards, visit www.astm.org and search by the standard designation, or contact ASTM Customer Relations (tel +1.877.909.ASTM; sales@astm.org). ASTM welcomes participation in the development of its standards. Become a member at www.astm.org/JOIN.

CONTACT Technical Information: Delin Li, CanmetMATERIALS • Hamilton, Ontario, Canada • tel +1.905.645.0778 | ASTM Staff: Kathleen Chalfin • tel +1.610.832.9717 | Upcoming Meeting: May 3-4, 2016 • May Committee Week • San Antonio, Texas