Joliet Metallurgical Laboratories, Inc.

Joliet Metallurgical Laboratories, called JML, is a metallurgical testing laboratory in Joliet, Illinois. It specializes in creep and stress rupture testing. The company says it has tested in its Joliet facility since 1956 and that it is the largest facility of its kind in the United States.

The lab lists 300 test stands for stress rupture, creep and creep rupture testing. Temperatures run from room temperature up to 2000 degrees Fahrenheit. It says it has been NADCAP approved since 1994. It also says it can test advanced materials, including single crystal alloys.

Laboratory services include low stress ground specimen preparation, tensile testing, stress rupture testing, and creep and creep rupture testing. The lab says it focuses on long term tests of more than five years. Its instruments avoid the drift linked to electronic LVDT and capacitance transducers. It uses dual extensometers with computer averaging for more precision at low strain rates, and has automatic backup power.

Testing follows AMS or ASTM specifications, or the customer's own. The customer is told if a test fails to meet minimum requirements. Results come in hard copy and digital form.

Industries served are aerospace, automotive, forging and casting, gear, government, medical, military and power generation. The website has a request a quote button and a contact form. The lab is at 305 Republic Avenue, Joliet, and the phone number is 815-725-9500. Office hours are Monday to Friday, 8AM to 5PM.