Similar International Standards
ASTM B29-20ASTM International (USA)
HighCurrent
Standard Specification for Refined Lead
Specifies multiple grades of refined lead in pig or ingot form for various industrial uses.
BS EN 12659:1999BSI - British Standards Institution (UK) / CEN - European Committee for Standardization
HighCurrent
Lead and lead alloys. Lead
Defines grades, chemical compositions, and forms of delivery for unalloyed lead in cast form.
JIS H 2105:2007JSA - Japanese Standards Association (Japan)
HighCurrent
Lead ingots
Specifies the quality and chemical composition for several classes of refined lead ingots.
Key Differences
≠IS 782 specifies a single grade of lead with 99.85% min purity, whereas modern standards like ASTM B29 and EN 12659 define multiple grades, some with much higher purity (e.g., >99.99%) for different applications.
≠The maximum allowable Antimony (Sb) content in IS 782 is 0.015%, which is significantly higher than in many comparable international grades (e.g., <0.002% in some ASTM B29 grades) where antimony is more strictly controlled.
≠IS 782 is highly specific to 'Caulking Lead' for pipe joints, an increasingly niche application. International standards have a broader scope, covering refined lead for batteries, chemical processing, and alloying, reflecting modern usage.
≠IS 782 includes a requirement for 'Total impurities (other than Sb and Bi)' not to exceed 0.04%. Most international standards do not specify a grouped total impurity limit, instead relying on individual maximums for each element and the minimum lead percentage.
Key Similarities
≈All standards specify the primary material as refined, unalloyed lead supplied in cast form, typically as pigs or ingots.
≈The fundamental method of defining the material quality across all standards is by specifying the chemical composition, with maximum limits set for key impurities.
≈The maximum limit for Bismuth (Bi) impurity is 0.05% in IS 782, which is identical to the limit for specific common grades in both ASTM B29 (Grade L50021) and JIS H 2105 (Class 3), indicating a shared understanding of this element's acceptable level.
≈All standards mandate marking the cast products (pigs/ingots) with manufacturer identification and a lot/cast number for traceability.