Co added to S03X7Ca-72M forms a barrier layer at the iron tip surface, which inhibits erosion of the tip. S03X7Ca-72M significantly reduces wear of iron tips compared to regular lead-free solder.
Co added to S01X7Ca-72M forms a barrier layer at the iron tip surface, which inhibits erosion of the tip. S01X7Ca-72M significantly reduces wear of iron tips compared to regular lead-free solder.
72M series contain new activators for improved wettability and new resin composition for better flux coverage.
Indium is added at the ideal rate of 6% to improve strength and to prevent any deterioration.