Devices and systems are disclosed herein for drawn arc stud welding. These systems and devices are extremely portable (<50 lbs.), deliver enough power for up to diameter studs, and include a charging circuit, an energy storage device comprising a plurality of low ESR ultracapacitors, and a discharge circuit. The systems and devices can include a lithium nickel manganese cobalt oxide (LiNiMnCoO.sub.2) battery to supply the energy storage device with about 20 to about 30 amps of current between welding operations.

A system is provided comprising a hardened stud body and an unhardened stud subunit coupled to the hardened stud body. The hardened stud body may comprise a first composition having by weight between 17% and 21% chromium, between 2.8% and 3.3% molybdenum, between 50% to 55% nickel, and between 4.75% and 5.5% niobium. The unhardened stud subunit may comprise a second composition having by weight between 20% and 23% chromium, between 8% and 10% molybdenum, at least 58% nickel, and between 3.15% and 4.15% niobium.

A refractory anchor comprising an elongated mounting pin having a first end and a second end opposite to the first end seen in the longitudinal direction of the elongated mounting pin, wherein the first end of the elongated mounting pin is weldable to an object, the refractory anchor further comprises two anchor fins of which each has a first anchor fin section having a first side and an opposing second side located at a distance of the elongated mounting pin with respect to the first side, wherein the first side is connected to the elongated mounting pin.

A method for providing an assembly of an object and refractory anchors includes providing the refractory anchors, each including a mounting pin made from a first alloy and two anchor fins connected to each other by a connector, wherein the connector is connected to the elongated mounting pin, wherein the anchor fins and the connector are made of a second alloy different from the first alloy; and welding the mounting pins of the refractory anchors to the object.