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Brass Round Rod/Cadmium-less Brass Round Rod
Our brass round rods provide particularly excellent accuracy on the dimension
finished by either cold drawing or lathing, especially we have confidence
in large diameter rods.
There are also Cadminon CN series - cadmium-less brass round rods corresponding
to "RoHS Directive" in 2006. This series has 4 types of material;
free-cutting brass round rod, forging brass round rod, naval brass round
rod and high strength brass round rod, and 2 types of cadmium content;
75ppm or 100ppm or less. |
Brass Round Rod
Cadmium-less Brass Round Rod
 |
| ฃBrass Round Rod |
Example of Use
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| ฃStepper-Semiconductor Manufacturing Equipment |
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| ฃStepper(inside) |
Types
| Types |
Applicable
JIS No. |
Features and application examples |
| Free-cutting brass round rods |
JIS H3250
C3604BDฅBF-Fฆ |
Excellent workability. Applied for connectors, flanges, machine parts, and others. Brass round rods manufactured to pressure-resistant, cutting, and other applications are available. |
| Forging brass round rods |
JIS H3250
C3712BDฅBF-Fฆ |
Outstanding hot forgeability renders forging brass round rods suitable for precision forging. Used for machine parts. |
JIS H3250
C3771BDฅBF-Fฆ |
Material with superb hot forgeability and workability. Used for values, machine parts, and others. |
| Naval brass round rods |
JIS H3250
C4622BF-Fฆ |
Material with excellent corrosion resistance, particulary, seawater resistance. Used for marine parts, shafts, etc. |
JIS H3250
C4641BF-Fฆ |
| High-tension brass round rods |
JIS H3250
C6782BF-Fฆ |
Material with high strength and with good hot forgeability and corrosion resistance. Used for marine propeller shafts, pump shafts, etc. |
| Note:In the place marked with ฆ, designation BD is used for finishing by drawing
and BF-F for finishing by lathing after hot forging. |
Chemical Compositioni%j
| Types |
Alloy
No. |
Chemical composition) |
| Cu |
Pb |
Fe |
Sn |
Zn |
Al |
Mn |
| Free-cutting brass round rods |
C3604 |
57.0`
61.0 |
1.8`
3.7 |
0.50 |
Fe{Sn
1.2 |
rem. |
\ |
\ |
| Forging brass round rods |
C3712 |
58.0`
62.0 |
0.25`
1.2 |
Fe{Sn
0.8 |
rem. |
\ |
\ |
| C3771 |
57.0`
61.0 |
1.0`
2.5 |
Fe{Sn
1.0 |
rem. |
\ |
\ |
| Naval brass round rods |
C4622 |
61.0`
64.0 |
0.30 |
0.20 |
0.7`
1.5 |
rem. |
\ |
\ |
| C4641 |
59.0`
62.0 |
0.50 |
0.20 |
0.5`
1.0 |
rem. |
\ |
\ |
| High-tension brass round rods |
C6782 |
56.0`
60.5 |
0.50 |
0.10`1.0 |
\ |
rem. |
0.20`
2.0 |
0.50`2.5 |
| Ask our expert staff for special compositions. |
Range of sizes
| Diameterimmj |
Max. length |
| 50`95ำ |
4m |
| 100`185ำ |
3m |
| 190`245ำ |
2.5m |
| 250`295ำ |
1.5m |
| 300`400ำ |
0.8m |
| Othe sizes produced on request. |
Performance
<Mechanical properties>
| Types |
Alloy No. |
Temper
grade |
Applicable
JIS No. |
Diameter
(mm) |
Tensile test |
Hardness test |
Tensile
strength
(N/mm2) |
Elongation
ij) |
Vickers
HV
(0.5ศใj |
Brinell
HB
(10/3000) |
| Free-cutting brass round rods |
C3604 |
F |
C3604BF-F |
50
|
335
|
\ |
80
|
\ |
| Forging brass round rods |
C3712 |
F |
C3712BF-F |
50
|
315
|
15
|
\ |
\ |
| C3771 |
F |
C3771BF-F |
| Naval brass round rods |
C4622 |
F |
C4622BF-F |
115
|
345
|
20
|
\ |
\ |
| C4641 |
F |
C4641BF-F |
115
|
345
|
20
|
\ |
\ |
| High-tension brass round rods |
C6782 |
F |
C6782BF-F |
115
|
460
|
15
|
\ |
\ |
<Diameter tolerances>iunit:mmj
| Diameter |
Tolerances |
|
50 |
}0.10 |
| 50@
110 |
}0.3 |
| 110@300 |
}1.0 |
| Remarks: |
1. |
When plus or minus only diameter tolerances are specified, tolerances are double the numerical values on the above. |
| |
2. |
Still more stringent tolerances than specified are available on request. |
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3. |
The tolerances of roundness shall be 1/2 or less the tolerances of diameter. |
Since June in 2005, we have started the manufacturing and sales of Cadminon
CN series - brass bars that clear the "RoHS Directive". For this
series, eight types of brass bars are available in total now - two types
of cadmium content (100ppm or less and 75ppm or less) for four respective
existing products.
With a wide variety of sizes ranging from 50f to 450f or more, we provide
free-cutting, forging, naval, and high strength brass bars corresponding
to conventional products. |
What is hRoHS DirectivehH
Since July 1, 2006, EU (European Union) has introduced the "RoHS Directive"
(Restriction of the Use of Certain Hazardous Substances) that prohibits
the sales of materials used for electric and electronic devices within
the EU area unless cadmium content is restricted to 0.01% (100ppm) or less
and lead, mercury, and hexavalent chromium to 0.1% (1000ppm) or less.
ฆFor brass bars, lead content shall be restricted to 4% (40,000ppm) or
less for a while as a special case. |
 |
| @ฃThe end surface of cadmium-less brass bars is colored with "purple"
as shown in the picture above to distinguish with conventional products. |
Types
| Types |
Designation |
Cd content |
Features and application examples |
| Cadminon CN series Free-cutting brass bar |
CN34-100 |
100ppm or less |
Excellent in machinability. Used in screws, gears, valves, and camera parts. Can be manufacured according to usages such as for pressure-resistance and machining. |
| CN34-75 |
75ppm or less |
| Cadminon CN series Forging brass bar |
CN37-100 |
100ppm or less |
Excellent in hot forgeability and suitable for precision forging. Used in machine parts. |
| CN37-75 |
75ppm or less |
Excellent in hot forgeability and machinability. Used in valves and machine parts. |
| Cadminon CN series Naval brass bar |
CN40-100 |
100ppm or less |
Excellent in anti-corrosion and especially in sea water resistance. Used in ship parts and shafts. |
| CN40-75 |
75ppm or less |
| Cadminon CN series of High strength brass bar |
CN60-100 |
100ppm or less |
High in strength and excellent in hot forgeability and corrosion resistance. Used in ship propeller shafts and pump shafts. |
| CN60-75 |
75ppm or less |
Our Cadminon CN series are manufactured through (hot rolling+cold drawing) and (hot forging+lathe turning).
Especially excellent in dimensional accuracy and surface condition. We
have absolute confidence in manufacturing thick bars. |
Quality management
| 1. |
Management of raw material component |
| |
o limit cadmium content in brass bars less than 100ppm, a regulation value specified in the RoHS Directive, cadmium content in raw materials (chip, copper scrap, zinc, etc) must be restricted. A small quantity of purchased raw materials is dissolved to make analytical samples. The surface of the samples, then, is polished to analyze other minor components with an X-ray fluorescence analyzer.
Analytical values of raw materials are grasped before use in our company.
Based on the analysis results, we avoid the use of any raw materials that
are not in compliance with the chemical component required in the RoHS
Directive. |
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| 2. |
Management in production line |
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For cast billet accepted in in-house judging standard for "Cadminon" based on analysis results after electric furnace dissolution, purple paint is applied on its edge face to distinguish with conventional general cast billet.
After completion of every operation at every manufacturing process, we apply purple paint on the edge surface of in-process items, which helps us to carry out identification management until they are final products. |
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| 3. |
Checking cadmium content in product |
| |
An X-ray fluorescence analyzer is used to analyze and check a small amount of cadmium.
By using samples picked from products, we analyze cadmium content again with an atomic absorption analyzer, performing reaffirmation and double-check of cadmium content.
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| 4. |
Our cadmium analysis method |
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X-ray fluorescence analysis: For X-ray fluorescence analysis, the sample material is irradiated with X-rays, which excite secondary X-ray fluorescence. The secondary X-ray fluorescence is detected and splitted to perform elemental analysis.
Atomic absorption analysis: Atomic absorption analysis is a method in which the liquid sample is atomized in a flame. The flame is, then, rayed by a light source to measure the absorption of light unique to respective metal with a detector through a spectrometer.
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Copyright(C) 2008 Gonda Metal Industry Co., Ltd. All Rights Reserved. |
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Company Profile and History
