The following grades of brass are manufactured by SAI Industires and its associate companies: 1. Brass 70:30
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The following grades of brass are manufactured by SAI Industires and its associate companies: 1. Brass 70:30
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| Brass 70:30 This is Copper and Zinc alloy containing 70% copper and 30% Zinc. This alloy is used in electronic, elctrical, automobile and agro industries. This alloy has very good ductility.
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| 70/30 Cartridge Brass | 65/35 (2\1) Brass | Common Brass(63\37) | ||
| Specifications | ||||
| Sheet & Strips | BS/2870/CZ 106 IS/410/1977 |
BS/2870/CZ 107 | BS/2870/CZ 108 IS/410/1977 |
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| Rods | BS/2874/CZ 106 |
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| Wires | BS/2873/CZ
106 |
BS/2873/CZ 107 | BS/2873/CZ 108 IS/4413/1967 |
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| Chemical Composition(%) | ||||
| Copper | 68.5 to 71.5% | 64.0 to 67.0% | 61.5 to 64.5% | |
| Lead | 0.03% Max | 0.03% Max | 0.03% Max | |
| Iron | 0.05% Max | 0.05% Max | 0.05% Max | |
| Total
Impurities (including Iron) |
0.30 | 0.30 | 0.30 | |
| Zinc | Remainder | Remainder | Remainder | |
| Mechanical Properties | ||||
| U.T.S. | (A) (H) |
325 N/mm2 540 N/mm2 |
325 N/mm2 570 N/mm2 |
335 N/mm2 570 N/mm2 |
| Elongation (%) | (A) (H) |
65 14 |
65 10 |
55 7 |
| Hardness (VPN) |
(A) (H) |
70 170 |
70 170 |
80 180 |
| Brass 65:35 and 63:37 This as name suggests contains 65% copper plus 35% Zinc and 63% Copper plus 37% Zinc respectively. Compared to 70:30 Brass it has less ductility and its field of application is more or less same as Brass 70:30.
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| Free Machining Brass This Brass contains copper between 56 to 60% with lead varying between 1.5 to 2.8% and balance as Zinc. As the name suggests this alloy is used where items require lot of machining operation. This alloy is generally supplied in rod and wire form.
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| Forging Brass
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| This Brass contains
copper between 58% to 62% of Copper with lead between 0.8 to 1.8% and balance
as Zinc. This alloy is best suited for items which require forging and subsequent
machining operations.
Data Sheet:
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| Forging Brass | Free Machining Brass | Free Machining | |
| Specifications | |||
IS 6912/1985 |
BS/2874/86/CZ 121 IS 319/1989 Type I |
BS/2874/CZ 124 IS 319/1989 Type II |
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| Chemical Composition(%) | |||
| Copper | 56.5 to 60.0% | 56.0 to 59.0% | 60.0 to 63.0% |
| Lead | 1.0 to 2.59% | 2.0 to 3.5% Max | 2.5 to 3.7% Max |
| Iron | 0.30% Max | 0.35% Max | 0.35% Max |
| Total Impurities (excluding Iron) |
0.25% Max |
0.70% Max |
0.50% Max |
| Mechanical Properties | |||
| U.T.S. | 310 N/mm2 | 370 to 460 N/mm2 | 340 to 520 N/mm2 |
| Elongation (%) | 20 Min. | 4 to 17 Min | 7 to 20 Min. |
Product Range
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| Strips | 4 mm to 100 mm width 0.4 mm to 6 mm thick |
| Rods | 1.20 mm to 80 mm dia. |
| Wires | 0.2 mm to 16 mm dia. |
| Tubes | 4 mm to 70 mm dia 0.25 mm to 8 mm thick |
