JACKSUN NOVA 309Mo

AWS A5.4 E309Mo-16

JACKSUN NOVA 309Mo is a rutile-coated stainless steel electrode conforming to AWS A5.4 E309Mo-16. It is designed for welding dissimilar steels (carbon steel/low alloy steels to stainless steels) and stainless steel overlays where molybdenum addition is beneficial. The presence of Mo (2.0–3.0%) enhances resistance to pitting, crevice corrosion, and stress corrosion cracking, particularly in chloride-containing environments. Typical applications include buffer layers, transition joints, and surfacing in chemical, petrochemical, and marine industries.

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Technical Data

Product Specifications

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

C	Mn	Si	Cr	Ni	Mo	S	P	Cu
≤ 0.12	0.5 – 2.5	≤ 1.0	22.0 – 25.0	12.0 – 14.0	2.0 – 3.0	≤ 0.03	≤ 0.04	0.75

2. Mechanical Properties of Weld Metal

Property	UTS (MPa)	Proof Strength (MPa)	Elongation (%)	Impact Toughness (J at RT)
Requirement	≥ 550	≥ 320	≥ 30	≥ 47
Typical Values	560 – 620	330 – 380	30 – 35	55 – 70

3. Dimension, Current Condition & Packing Data (SMAW Welding)

Size (mm)	Size (inch)	Current Range (A)	Polarity	Voltage (V)	Packing (5 kg)	Packing (20 kg)
2.5	3/32	60 – 90	AC/DCEP	20 – 25	✔	✔
3.2	1/8	80 – 120	AC/DCEP	22 – 28	✔	✔
4.0	5/32	100 – 150	AC/DCEP	24 – 30	✔	✔
5.0	3/16	130 – 180	AC/DCEP	26 – 32	✔	✔

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