STARBLAZE SS 312
AWS A5.4: E312-16 | DIN EN ISO 3581-A: E 29 9 R 12
Dissimilar Steel Welding, High Strength Weld Deposits, Universal Repair Electrode
A high-alloy rutile-basic coated stainless steel electrode with approximately 40% ferrite in the weld deposit, specially designed for dissimilar metal joining, repair welding, and difficult-to-weld steels. StarBlaze SS 312 provides exceptional crack resistance, superior weldability, soft fusion characteristics, spatter-free welding, self-releasing slag, smooth weld bead appearance, and easy striking and restriking. It is ideal for joining high-strength steels, tool steels, spring steels, cast steels, and dissimilar metal combinations, while also serving as an excellent buffer layer prior to hardfacing applications. Supplied in vacuum-packed packaging for enhanced moisture protection and welding consistency.
Available Packs
Dimensions: 2.50 mm x 350 mm, 3.15 mm x 350 mm, 4.00 mm x 350 mm, 5.00 mm x 450 mm
Pack Sizes: 2.5 Kg Vacuum Pack, 4 Kg Vacuum Pack, 5 Kg Vacuum Pack
Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
Approx. 40% ferrite weld deposit
Excellent for dissimilar metal welding
High strength weld deposits
Superior crack resistance
Soft fusion characteristics
Spatter-free welding
Self-releasing slag
Smooth weld bead appearance
Easy striking and restriking
Excellent repair welding performance
Ideal buffer layer before hardfacing
Suitable for AC and DC+ polarity
Tool and Die Manufacturing
Steel Fabrication Industry
Mining Equipment Repair
Heavy Engineering Industry
Maintenance and Repair Workshops
Power Generation Industry
Construction Equipment Manufacturing
General Fabrication Industry
Manual Metal Arc Welding (MMA/SMAW)
Dissimilar steel welding
Repair welding of difficult-to-weld steels
Tool steel repair applications
Spring steel welding
Cast steel repair welding
Buffer layer welding before hardfacing
Maintenance and reclamation welding
Designed for joining high-strength steels
Suitable for tempered steels
Suitable for tool steels
Suitable for die steels
Suitable for spring steels
Suitable for dissimilar steel combinations
Suitable for cast steels
Recommended as a buffer layer prior to hardfacing
Preheating may be required depending on base material composition
Low heat input is recommended
Maximum interpass temperature: 200°C
Keep dry and avoid condensation
Re-dry at 300–350°C for 1–2 hours if necessary
Supplied in vacuum-packed packaging
Product Details
Typical Chemical Composition (%)
| C | Si | Mn | Cr | Ni | S | P |
| 0.10 | 0.90 | 1.00 | 29.00 | 9.50 | 0.010 | 0.015 |
Typical Mechanical Properties (All Weld Metal)
| Yield Strength Rp (N/mm²) | Tensile Strength Rm (N/mm²) | Elongation A5 (%) |
| ≥ 500 | ≥ 800 | ≥ 20 |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-80 |
| 3.15 | 70-110 |
| 4.00 | 100-150 |
| 5.00 | 140-190 |
