Low Alloy Steel

ROYAL PRIME 91B3

AWS/ASME: A5.29 E91T1-B3

ROYAL PRIME 91B3 is a low alloy flux-cored wire specially designed for welding 2.25% Cr – 1% Mo creep-resistant steels. It provides weld metal with excellent creep strength, oxidation resistance, and toughness for high-temperature service. Applications include boilers, power plants, petrochemical refineries, heat exchangers, and pressure vessels.

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

C	Mn	Si	Ni	Mo	Cu	Cr	P	S
0.05 – 0.12	0.50 – 1.25	0.35 – 0.80	–	0.90-1.20	–	2.00 – 2.50	≤0.03	≤0.03

2. Typical Mechanical Properties of Weld Metal

Property	UTS (MPa)	Yield Strength (MPa)	Elongation (%)	Impact Toughness
Typical Values	640 – 760	540 – 580	17 – 24	40 – 55 J @ –29°C

3. Recommended Welding Parameters — A5.29 E91T1-B3

Welding Position	Current (A)	Voltage (V)	Shielding Gas	Gas Flow (L/min)
Flat / Horizontal	200 – 400	26 – 36	CO₂ or Ar + 20–25% CO₂ (mix)	15 – 25
Vertical / Overhead	160 – 300	24 – 33	CO₂ or Ar + 20–25% CO₂ (mix)	15 – 25

Quality Assured

Tested for consistent performance.

Fast Delivery

Reliable and on-time shipping.

Secure Payment

100% secure payment options.

Expert Support

Our team is here to help you.