Lead Antimony Alloys
Updated Chemical Composition
(Percentages are in maximum unless shown otherwise)
| Grade | Antimony % | Arsenic % | Tin % | Copper % | Bismuth % | Iron % | Zinc % | Silver % | Lead % |
|---|---|---|---|---|---|---|---|---|---|
| PbSb 1 | 0.8-1.2 | - | - | 0.05 | 0.03 | 0.003 | 0.001 | 0.02 | Balance |
| PbSb 2 | 1.8-2.2 | - | - | 0.05 | 0.03 | 0.003 | 0.001 | 0.02 | Balance |
| PbSb 5 | 4.5-5.5 | - | - | 0.05 | 0.03 | 0.003 | 0.001 | 0.04 | Balance |
| PbSb 6 | 5.5-6.5 | - | - | 0.05 | 0.03 | 0.003 | 0.001 | 0.04 | Balance |
| PbSb 8 | 7.5-8.5 | - | - | 0.05 | 0.03 | 0.003 | 0.001 | 0.04 | Balance |
| PbSb 10 | 9.5-10.5 | - | - | 0.05 | 0.03 | 0.003 | 0.001 | 0.04 | 91-92 |
| PbSb 5Sn | 5.2-5.8 | 0.05-0.25 | 1.7-1.9 | 0.05 | 0.03 | 0.003 | 0.001 | 0.04 | Balance |
1. Arsenic and tin limits are subject to agreement for all grades except PbSb 5Sn.
2. Analysis shall regularly be made only for the impurities listed.
Indian Standard
Lead Antimony Alloys: Specification
1. SCOPE
This standard covers the requirements for lead-antimony alloys.
2. REFERENCES
- IS 403: 1964 - Methods of chemical analysis of lead and antimonial lead.
- IS 1387: 1967 - General requirements for the supply of metallurgical materials.
- IS 8439: 1973 - Method for sampling lead and lead alloys.
3. GRADES
Covers seven grades: PbSb1, PbSb2, PbSb5, PbSb6, PbSb8, PbSb10, and PbSb5Sn.
4. SUPPLY OF MATERIAL
4.1 Conforms to IS 1387: 1967.
4.2 Supplied in the form of pigs unless otherwise specified.
5. CHEMICAL COMPOSITION
5.2 Composition determined by IS 403: 1964 or established instrumental methods. IS 403 is the referee method.
6. FREEDOM FROM DEFECTS
Pigs shall be uniform, clean, and free from foreign matter, slag, or dross.
7. MASS
7.1 The mass of each pig shall not be more than 50 kg.
7.1.1 In case the lead-antimony alloys are supplied in some other form to meet the pur-chaser's requirements, the mass shall be as agreed to between the purchaser and the manufacturer.
8. SAMPLING
Sampling shall be in accordance with IS 8430.
9. RETEST
If the sample prepared under 8 and tested fails to meet the requirements of chemical composition specified under 5.1 ( Table 1 ), two more tests shall be conducted on the same sample in order to conform that the analysis has been done properly. If both the test results satisfy the relevant requirements, the lot shall be accepted. Should either of the retest fail, the lot represented shall be deemed as not complying with this standard.
10. INSPECTION
10.1 All inspection and testing of lead-anti- mony alloys covered in this standard shall be carried out by the manufacturer unless other- wise agreed to between the manufacturer and the purchaser. The inspections requirements shall be stated in the enquiry and order.
10.2 The purchaser shall notify the supplier which placing the order, if it is his intention to inspect lead-antimony alloys at the supplier's end. The supplier shall offer the purchaser all the necessary facilities for inspection and testing of the lead-antimony alloys in accordance with this standard. For this purpose the purchaser or his representative may, by prior arrangement, attend to inspect lead-antimony alloys to select and identify the test samples and witness the testing.
11. MARKING
11.1 Each pig shall be legibly marked with the following details:
- a) Cast/lot number,
- b) Grade of the lead-antimony alloy, and
- c) Indication of the source of manufacture.
11.2 Standard Marking
Lead-antimony alloy pigs may also be marked with the Standard Mark.
12. TEST CERTIFICATE
The supplier shall provide test certificate for each consignment giving information like cast/lot. number and corresponding chemical composition, etc.
