Stainless Steel

ROYAL PRIME 309L

AWS/ASME: A5.22 E309LT-1/4

ROYAL PRIME 309L is a flux cored stainless steel wire designed for:Welding dissimilar steels (stainless steel to carbon steel or low alloy steel).Buffer layers before hardfacing or stainless steel cladding.Applications requiring high resistance to oxidation and corrosion at elevated temperatures.Low carbon level ensures excellent resistance to intergranular corrosion. Stable arc, low spatter, and smooth bead appearance in all-position welding.

1. Typical Chemical Composition of Weld Metal (% by weight)

C	Mn	Si	Cr	Ni	Mo	S	P	Cu
≤ 0.04	0.5 – 2.5	0.30 – 1.00	22.0 – 25.0	12.0 – 14.0	≤ 0.50	≤ 0.04	≤ 0.04	≤ 0.50

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness (J @ -20 °C)
Typical Values	580 – 650	380 – 450	30 – 35	40 – 55

3. Recommended Welding Parameters — A5.22 E309LT-1/4

Welding Position	Current (A)	Voltage (V)	Shielding Gas (typical)	Gas Flow (L/min)
Flat / Horizontal	180 – 300	28 – 34	Ar + 20–25% CO₂ or 98% Ar + 2% O₂ (alt)	12 – 20
Vertical / Overhead	150 – 250	26 – 32	Ar + 20–25% CO₂ or 98% Ar + 2% O₂ (alt)	12 – 18

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