SnPbAu

metal
· JVASP-156448· SnPbAu

SnPbAu is a tin-lead-gold ternary alloy belonging to the soft solder family, traditionally used in electronics manufacturing and specialized joining applications. The addition of gold to conventional SnPb solder improves wetting behavior, reduces corrosion susceptibility, and enhances reliability in high-reliability interconnections, making it particularly valuable in aerospace, military, and medical device assembly where solder joint durability under thermal cycling and environmental stress is critical. This alloy represents a bridge between lead-based solders (now restricted under RoHS in consumer electronics) and modern lead-free alternatives, and remains relevant in niche applications where its specific property balance outweighs the cost premium of the gold addition.

electronic solder jointsaerospace interconnectsmilitary/defense electronicshigh-reliability medical devicesthermal cycling-resistant bondingcorrosion-resistant joining

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Bulk Modulus(K)
55.73
GPa—
Poisson's Ratio(ν)
0.4000
-—
Shear Modulus(G)
-2.240
GPa—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
10.48
kg/m³—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
0.000
eV—
Magnetic Moment(μB)
0.000
µB—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
0.000
eV/atom—
Formation Energy(ΔHf)
-0.05142
eV/atom—
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.