Lead-Free Brass
What is Pb Free Brass/Lead Free Brass?
- - Brass with its lead content less than 0.25% is called Pb Free Brass/Lead Free Brass. (California State Act of US AB153)
Eco-friendly regulations for the brass piping market
- 1. Domestic
- Lead (pb) elution standard 0.001mg / L (1ppb) notified by Ministry of the Environment, Waterworks Act No. 2011-79
- - Notified on May 25, 2011
- - Review period expired on 2013.05.25
- - Regulation started with the Enforcement Decree of Waterworks Act and Presidential Decree No. 25785
- 2. Overseas
- Regulation of the Lead (pb) content of the material itself, not the elution standard of the material, to be not more than 0.25%.
- - USA - 2010.01 AB 1953 enforced
- - Japan - 2011.01 JWWA enforced
Chemical Composition Comparison of Pb Free Brass/Lead Free Brass
| Alloy number | Cu | Pb | Fe | Sn | Si | Bi | Zn |
|---|---|---|---|---|---|---|---|
| C46400 | 59.0~62.0 | 0.2 or less | 0.1 or less | 0.5~1.0 | - | - | Remainder |
| C69300 | 73.0~77.0 | 0.09 or less | 0.1 or less | 0.2 or less | 2.7~3.4 | - | Remainder |
| C49340 | 60.0~63.0 | 0.09 or less | - | 0.5~1.5 | - | 0.5~2.0 | Remainder |
Mechanical Properties Comparison of Pb Free Brass/Lead Free Brass
| Alloy number | Tensile strength (N/㎟) | Yield strength (N/㎟) | Elongation (%) | Hardness (Hv) |
|---|---|---|---|---|
| C46400 | 345 or higher | 138 or higher | 30 or higher | 105 ~ 152 |
| C69300 | 480 or higher | 205 or higher | 10 or higher | 110~170 |
| C49340 | 335 or higher | - | - | 80 or higher |
Advantages/ Disadvantages of Pb Free Brass/Lead Free Brass
| Alloy number | Advantages | Disadvantages |
|---|---|---|
| C46400 |
· Low price (price ratio compared to ordinary brass 1: 1.3) · Convenient scrap treatment (Can be mixed with ordinary brass) · Excellent corrosion resistance. (Passed NSF corrosion test) |
|
| C69300 | · Highly recognized. · Excellent corrosion resistance. (Passed NSF corrosion test) |
· High price (Ratio of ordinary brass price ratio 1: 2.1) · Difficult to have sufficient supply (Direct import from Japan) · Disadvantageous scrap treatment (Cannot be mixed with ordinary brass and returned to Japan) |
| C49340 | · Passed lead elution regulation item (passed NSF / ANSI 61 standard) | · High price (price ratio compared to ordinary brass 1: 1.5) · Disadvantageous scrap operation (Cannot be mixed with ordinary brass |
EB Brass NSF Corrosion Test Result
| Alloy number | Advantages | Disadvantage |
|---|---|---|
| C46400 | Resistance to dezincification | PASS |
| Stress Corrosion Cracking in Ammonia | PASS | |
| Corrosion Resistance | PASS |
※For inquiries regarding lead free brass or to request a detailed quote, please do not hesitate to contact us.
Our team is ready to provide safe and efficient solutions tailored to your needs.
Our team is ready to provide safe and efficient solutions tailored to your needs.