The following Bronze and Brass Alloy chart is from an article by Anders Söderberg, "Blowing new life in old technology - Viking Age Metal-casting" found in the Documents portion of the Fröjel Gotlandica Viking Re-enactment Society
 

9th century bell from Hedeby: Cu 75, 33% Sn 17, 37% Pb 6, 56% (Roesdahl, E (red), Arnadóttir, L. Edgren, T. Hohler, E B. Liebgott, N-K. Tegnér, G. 1992. Från Vikingar Till Korsfarare. Norden och Europa 800-1200. Stockholm.p 280.)

Animal-head brooch. Garda, Gotland: Zn 20% Sn 10% Pb 6% (+Cu) (Oldeberg, A. 1966. Metallteknik från vikingatid och medeltid. Stockholm. p 57.)

Yellow ornamental inlay on a sword. Älvsby, Vänge sn, Uppl: Zn 30% Sn 10% (+Cu) (Oldeberg 1966:57)

Oval brooch. Ärsta, Runtuna sn, Sörml. Zn 20% Sn 10% (+Cu) (Oldeberg 1966:57)

Oval brooch. Brånnestad, St Joh sn, Ögötl. Zn 30% Pb 6% (+Cu) (Oldeberg 1966:57)

Animal-head brooch. Annexhemmanet, Hemse sn, Gotl. Zn 30% Pb 6% (+Cu) (Oldeberg 1966:58)

Buddah-statyette from Helgö: Cu 90% Sn 10% (Forshell, H. 1992. The Inception Of Copper Mining In Falun. Theses and papers in archaeology B:2. Sthlms Univ. Sthlm. p 61.)

Brooch. Hejnum, Gotland. Cu 77,5% Sn 5,2% Pb 4,2% Zn 11,2% Fe 1.0% (SHM 10725:8) (Forshell 1992:61)

Brooch. Lilla Bjerges, Lau, Gotl. Cu 73,3% Sn 0.0% Pb 1,1% Zn 11,2% (SHM 187003:28) (Forshell 1992:61)

Brooch. Bjärs, Hejnum. Gotl. Cu 88,8% Sn 3,5% Pb 1,4% Zn 5,8% (SHM 8767:109) (Forshell 1992:61)

Brooch. Alands, Hogrän, Gotl. Cu 87,6% Sn 7,2% Pb 1,4% Zn 3,8% (SHM 6048) (Forshell 1992:61)

Brooch. Grötlingbo, Gotl. Cu 68,8% Sn 1,2% Pb 1,3% Zn 28,7% (SHM 10482:3) (Forshell 1992:61)

Brooch. Grötlingbo, Gotl. Cu 79,7% Sn 6,7% Pb 4,2% Zn 9,2% (SHM 10482) (Forshell 1992:61)

Brooch. Kylver, Stånga, Gotl. Cu 69,8% Sn 1,5% Pb 3,5% Zn 25;3% (SHM 13436:5) (Forshell 1992:61)

Brooch. Sandegårda, Sanda, Gotl. Cu 73,7% Sn 0,8% Pb 1,7% Zn 22,3% (SHM 7480) (Forshell 1992:61)

Brooch. Lilla Ihre, Hellvi, Gotl. Cu 76,3% Sn 0,0% Pb 3,2% Zn 20,1% (SHM 20826:280) (Forshell 1992:61)

Brooch. Hade, Hedelunda, Jämtland. Cu 76,3% Sn 4,2% Pb 2,8% Zn 19,1% (SHM 143) (Forshell 1992:61)

Brooch. Bjärs, Hejnum, Gotland. Cu 85,3% Sn 3,4% Pb 1,4% Zn 7,4% Fe 1,1% (SHM 10298:139) (Forshell 1992:61)

Brooch. Roes, Grötlingbo, Gotl. Cu 74,2% Sn 0,0% Pb 2,2% Zn 24,6% (SHM 7563) (Forshell 1992:61)

Clasp button, Helgö. Cu 50.7% Sn 5,0% Pb 47,7% (Kyhlberg, O. 1980:184 Vikt och värde. Sthlm)

Weight, Birka, the Black Earth. Cu 73% Zn 22% (Kyhlberg 1980:187)

Weight, Birka, the Black Earth. Cu 74% Pb 16% (Kyhlberg 1980:187)

Weight, Birka, the Black Earth. Cu 76% Pb 13% (Kyhlberg 1980:187)

Weight, Helgö. Cu 73% Zn 23% (Kyhlberg 1980:187)