MIDALLOY ER630 BARE WIRE

CLASSIFICATION

 • AWS 5.9 Class ER630 / ASME SFA 5.9 Class ER630

 DESCRIPTION

• MIDALLOY ER630 bare welding wire is a precipitation hardening, martensitic stainless steel.

APPLICATIONS

• Typical applications include valves, fasteners, gears, propeller stafts, and roller chain pins.

TYPICAL CHEMISTRY

TYPICAL MECHANICAL PROPERTIES*

*Note: Mechanical properties listed reflect a post weld heat treatment between 1875°F and 1925°F for one hour, followed by precipitation hardening between 1135°F and 1165°F for four hours.

WELDING PARAMETERS

 OTHER INFORMATION

• Welding of 17/4 plate under 4” thick can be done without preheating, but interpass temperatures up to 300°F are commonly specified.

• With thickness of 17/4 plate exceeding 4”, preheating to 200°F and maintenance of an interpass temperature of 200°F - 500°F is considered necessary in many applications.

 • In welding maintain a short arc and keep the heat input low.

 • Use stringer beads, avoid wide weaving, avoid stress raisers such as sharp corners, threads, and partial penetration welds.

STANDARD PACKAGING

 • TIG 10 lb. tube / 60 lb. carton

• MIG 30 lb. spool