STARBLAZE PRIME 120-M (MOD)
AWS A5.5: E 12018-M | EN ISO 18275-A: E 79 5 Z B 32 H5 | IS 1395: E 83 B M4 26 Fe
Ultra-Low Hydrogen, High Strength, Radiographic Quality Welds
A basic coated low hydrogen iron powder type electrode specially developed for welding high-strength steels with yield strengths up to 850 N/mm². StarBlaze PRIME 120-M (MOD) delivers a stable and concentrated arc, low spatter levels, very easy slag removal, and finely rippled weld beads. Its Ni-Cr-Mn-Mo alloyed weld deposit provides excellent crack resistance, radiographic quality welds, superior mechanical properties, and outstanding impact toughness at low temperatures. With diffusible hydrogen levels below 3 ml/100 g weld metal, it is ideal for critical high-strength structural applications.
Available Packs
Dimensions: 2.50 mm x 350 mm, 3.15 mm x 450 mm, 4.00 mm x 450 mm, 5.00 mm x 450 mm
Pack Sizes: 2.5 Kg Pouch, 4 Kg Box, 5 Kg Box
Master Box: 20 Kg, 30 Kg, 40 Kg, Customisable packaging available on request
Low hydrogen iron powder electrode
Diffusible hydrogen less than 3 ml/100 g weld metal
Stable and concentrated arc
Low spatter generation
Very easy slag removal
Finely rippled weld beads
Excellent crack resistance
Radiographic quality weld deposits
Outstanding low-temperature toughness
High-strength weld metal for critical applications
Heavy Structural Steel Fabrication
Pressure Vessel Manufacturing
Hydropower Projects
Shipbuilding and Offshore Structures
Mining Equipment Manufacturing
Power Generation Projects
Defence and High Strength Steel Fabrication
Industrial Infrastructure Projects
Manual Metal Arc Welding (MMA/SMAW) of high-strength steels
Multi-pass welding of critical structures
Pressure vessel fabrication
Penstock fabrication and repair
Structural welding of high-strength steels
Positional welding in flat, horizontal, vertical up and overhead positions
Designed for welding steels with yield strengths up to 850 N/mm²
Suitable for S890, S(P)690, HY80, N-A-XTRA 70, and USST1 grade steels
Ni-Cr-Mn-Mo alloyed weld deposit offers excellent crack resistance
Produces radiographic quality welds for critical applications
Excellent impact toughness at -50°C
Hardness of deposited weld metal: 30–35 HRc
Keep electrodes dry and avoid condensation
Re-dry at 300–350°C for 1–2 hours if necessary
Diffusible hydrogen content below 3 ml/100 g weld metal
Suitable for AC and DC+ polarity
Product Details
Typical Chemical Composition (%)
| C | Si | Mn | Ni | Cr | Mo | S | P |
| 0.07 | 0.60 | 1.80 | 2.30 | 0.80 | 0.45 | 0.010 | 0.020 |
Typical Mechanical Properties (All Weld Metal)
| Test Condition | Yield Strength Rp (N/mm²) | Tensile Strength Rm (N/mm²) | Elongation A5 (%) | Charpy Impact Value (ISO-V J -51°C) |
| As Welded | 745-825 | ≥ 830 | ≥ 18 | ≥ 47 |
Additional Weld Metal Property
| Property | Value |
| Hardness (Pure Weld Metal) | 30 – 35 HRc |
Recommended Welding Parameters
| Diameter (mm) | Amperage Range (A) |
| 2.50 | 50-90 |
| 3.15 | 90-140 |
| 4.00 | 130-180 |
| 5.00 | 180-240 |
