The standard is for aluminum alloys used at low temperatures. Specifies solid wires (hereinafter referred to as wires) used for MAG welding of metal steel, 2.5% nickel steel, 3.5% nickel steel, etc.
JIS Z 3325:2000 history
2009JIS Z 3312:2009 Solid wires for MAG and MIG welding of mild steel, high strength steel and low temperature service steel
2000JIS Z 3325:2000 MAG welding solid wires for low temperature service steel
1990JIS Z 3325:1990 Mag welding solid wires for low temperature service steel