DESCRIPTION OF SPECIAL BRONZE ALLOYS PRODUCED IN EAST GERMANY

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP80-00810A002600110002-9
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 3
• Document Creation Date: December 22, 2016
• Document Release Date: November 19, 2009
• Sequence Number: 2
• Publication Date: October 19, 1953
• Content Type: REPORT

Sanitized Copy Approved for Release 2009/11/19: CIA-RDP80-0081OA002600110002-9
CENTRAL INTELLIGENCE AGENCY
INFORMATION REPORT
This Document contains Information affecting the Na-
tional Defense of the United States, within the mean-
ing of Title 18, Sections 799 and 794, of the U.S. Code, an
amended. Its transmission or revelation of its contents
to or receipt by an unauthorised person is prohibited
by law. The reproduction of this form is prohibited.
SECRET/CONTROL - U. S. OFFICIALS ONLY
SECURITY INFORMATION
PLACE ACQUIRED
East Germany
Description of Special Bronze
Alloys Produced in East Germany
REPORT
DATE DISTR. 19 October 1953
NO. OF PAGES 3
REQUIREMENT NO. RD
REFERENCES
THE SOURCE EVALUATIONS IN THIS REPORT ARE DEFINITIVE.
THE APPRAISAL OF CONTENT IS TENTATIVE.
(FOR KEY SEE REVERSE)
? Details are given below of special bronze alloys produced by the following
East German firms:`
VEB Kupf?r-- and Messingwalzwerk, Hettstedt
VEB Sonderbron'ce, Berlin-Cborsehoeneweide
VEB Halbzeugwerk, Auerhammer
VVB der Nichteisenetall.ind"ustrie, Aue
2. The following types of alloy are 'rroduced:
A. Bronze S11gy equivalent to AIBz 4
Composition: Copper - 95 - 96.5%
Aluminum - 3.5 - 5%
Possible methods
of treatment
(3)
Acid-proof machines required in the paper
and potash industries
Current conveyor springs; starting and
damping bars (Anlauf- and Daempferstaebe)
Condenser tubes
Lye pump components
Contacts for railway signalling gear
Spot welding
Gas welding,'when used with a suitable flux
(zinc chloride with free hydrochloric acid)
and preheated to 200 - 3000 C.
Electric arc welding,)but only when this is
undertaken with a suitably coated electrode
at the positive pole.
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(4)
(5)
Can be anneal.era At about 6500 C,
It is heat proof up to 3000 C. Malleable
at 600 - 8000 C. Can be deep drawn and is
resistant to potash lye.
Form in which supplied: (1) Soft, in bars or wire
2 Semi-hard, as sheet
3 Hard, as tubing
B. Bronze equivalent to A1Bz 9
Composition: Copper - 90 - 93%
Aluminum - 7 - 10%
Possible uses:
Possible methods of
treatment:
(3)
Valve sets for combustion engines
Components for mine water pumps
Pulp machines used in paper making
Brine pumps
Fittings in sebacic acid plants
Not suitable for welding
Suitable for gas welding only after
preheating and with special flux over
low flame.
Suitable for hot and cold teatment and
deep drawing. Heat resistant up to 3000
C. Malleable at 740 - 8000 C.
Form in which supplied: Supplied as forgings, sheet, bars, wire
and tubing.
G. Bronze equivalent to GAIBz 9
Composition: Copper - 89 - 92%
Aluminum - 8 - 10%
Possible uses:
(1)
(2)
Worm wheels subject to great stress
Machine parts expUged to great heat or
corrosion.
Possible methods of Suitable for gas welding after preheating,
treatment:
Form in which supplied: As chilled, sand and
D. Bronze equivalent to A1MBz 10
Composition:
Copper - 88 - 90.5%
Aluminum - 8 - 11%
Iron - 1.5%
Manganese - 2%
Silicon - 1%
pressure castings.
Worms, slide bearings
Under water (sea) diaphragms
Starting and damping bars for electrical
engineering..
Valve sets, water pressure controls,
piston rods and cylinders.
Plungers for brine pumps.
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-3-
Possible methods of (1) Suitable for gas welding over low flame
treatment: after preheating.
(2) Suitable for deep drawing and heat
treatment. Malleable at 8000 C.
E. Bronze eauivalgnt to GAIMIBz 10
Composition:
Possible usess (1)
(2)
(3)
(4)
Possible methods of (1)
treatment:
(3)
Copper' - 85%
Aluminum - 8 - 12%
Lead - 2%
Metal - 1%
Zinc - 1%
Plus small quantities of manganese, iron
and silicon.
Worm, bevel and gear wheels.
Super-heated steam fittings.
Blade wheels in salt water pumps.
High speed spindle nuts.
Not,_suitabie,for,_gas welding.
Can be cast, but only at low temperatures.
Suitable for centrifugal, pressure and
composite castings.
Form in which supplied: Supplied as sand or chilled castings.
3. The average monthly output of these alloys, from the four factories listed
in paragraph 1, is approximately 90 tons.
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Sanitized Copy Approved for Release 2009/11/19: CIA-RDP80-0081OA002600110002-9