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 (OEMs) 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.

For more news in this sector, visit www.astm.org/sn-metals.

ASTM Committee A04 on Iron Castings Next Meeting: May 3-4, 2016, May Committee Week, San Antonio, Texas
Media Inquiries: Nathan Osburn, tel +1.610.832.9603; nosburn@astm.org
Technical Contact: Delin Li, CanmetMATERIALS, Hamilton, Ontario, Canada, tel +1.905.645.0778; delin.li@canada.ca
ASTM Staff Contact: Kathleen Chalfin, tel +1.610.832.9717; kchalfin@astm.org 
   

Release #9966