Carbo L-Ag 40 Sn(F)

Carbo L-Ag 40 Sn (F)

Carbo L-Ag 40 Sn (F) is a silver brazing rod, which is free of cadmium. It is suitable for joints of steels, copper, bronze, brass and nickel alloys. The silver solders are available with and without flux-coating

Technical Data

Application hints:

The base material should be clean of oxides, fat oil, grease and preferably be metallic blank. An additional flux suitable for the base material should be applied. For optimal penetration the base material sheets should be adjusted properly with an equal gap and must be heated up to the below shown melting temperature before infusing the brazing alloy.

Soldering instruction

In normal cases a neutral flame adjustment is required, but on zinc-plated sheets and brass or depositing overlays light oxigin excess is optimal. After brazing flux-residues should be removed and the open end of the applied rod must be closed by hammering for avoiding uncontrolled reactions of out coming flux

Mechanical properties of all-weld metal
( typical values)
I = 5 d
Melting range
Solidus     Liquidus
20 9.1 650°C      710°C 690° C
Tensile strength Rm N/mm² an St37 An St50  
  350      430 11 Sm/mm²

The mecanical properties can be decreased by soldering of carbon steel
of pure deposit %Weld metal analysis %
Ag Zn Sn Si Cu
40 21 2 0.15 Rest
Dia/Length Pcs/packet Pcs/carton Kg/1000 kg/packet Kg/carton
1.0 x 500       1.0  
1.5 x 500       1.0  
2.0 x 500       1.0  
3.0 x 500       1.0  

Materials Safety Data Sheet

01. Product and Company Identification:
Supplier: Carbo-Weld Schweissmaterialien GmbH
Address: Im Hasseldamm 21, 41352 Korschenbroich, Germany
Tel: 0049 2161 56483-0
Fax: 0049 2161 56483-10
Responsible: Quality Management
Date of issue :  
Product name: CARBO L-Ag 40 Sn
Application: Brazing
International Standards
EN 1044: Ag 105
ISO 3677 : B-Ag40CuZnSn- 650/710
02. Hazards Identification
Emergency Overview:

Coated metal rods in varying colours. This product is normally not considered hazardous as shipped. Gloves should be worn when handling to prevent contaminating hands with product dust. This prod- uct contains nickel, which is classified as a skin sensitizer and a suspect carcinogen. This product contains titanium dioxide which is possibly carcinogenic. This prod- uct contains quartz, but normally not in inhaling fraction. Quartz can cause silicosis and may cause cancer. Avoid eye contact or inhalation of dust from this product. Skin contact is normally no haz- ard but should be avoided to prevent possible al- lergic reactions. Persons with a pacemaker should not go near welding or cutting operations until they have consulted their doctor and obtained informa- tion from the manufacturer of the device. When this product is used in a welding process, the most important hazards are heat, radiation, electric shock and welding fumes

Heat: Spatter and melting metal can cause burn injuries and start fires.
Radiation: Arc rays can severely damage eyes or skin.
Electricity: Electric shock can kill

Overexposure to welding fumes may result in symptoms like metal fume fever dizziness, nausea, dryness or irritation of the nose, throat or eyes. Chronic overexposure to welding fumes may affect pulmonary function. Prolonged inhalation of nickel and chromium compounds above safe exposure limits can cause cancer. Overexposure to manganese and manganese compounds above safe exposure limits can cause irreversible damage to the central nervous system, including the brain, symptoms of which may include slurred speech, lethargy, tremor, muscular weakness, psychological disturbances and spastic gait.

03. Composition/ Information on Ingredients
This product is a preparation of core wire with extruded coating
Core wire type: Ag40Sn
Coating Ingredients:
Material Weight % CAS# EINECS#
Copper 21 - 23 7440-50-8 231-159-6
Zinn 4 -.6 7440-31-5 231-141-8
(1) Hazard Classification according to European Council Directive 67/87/EWG, for R-phrases see Section 16.
(2) Evaluation according to the International Agency for Research on Cancer. 1- Carcinogenic to humans.
(3) Classification according to the 11th report on Carcinogens, published by the US- National Toxicology program
(4) Occupational Safety & Health Administration, USA
04. First Aid Measures

If breathing has stopped, perform artificial respiration and obtain medical assistance immediately ! If breathing is difficult, provide fresh air and call physician.

Eye contact:

For radiation burns due to arc flash, see physician. To remove dusts or fumes flush with water for at least fifteen minutes. If irritation persists, obtain medical assistance.

Skin contact:

For skin burns from arc radiation, promptly flush with cold water. Get medical attention for burns or irritations that persist. To remove dust or particles wash with mild soap and water.

Electric shock:

Disconnect and turn off the power. Use a nonconductive material to pull victim always from contact with live parts or wires. If not breathing, begin artificial respiration, preferably mouth-to-mouth. If no detectable pulse, begin Cardio Pulmonary Resuscitation (CPR). Immediately call a physician.


Move to fresh air and call for medical aid.

05. Fire fighting measures

No specific recommendations for welding consumables. Welding arcs and sparks can ignite combustible and flammable materials. Use the extinguishing media recommended for the burning materials and fire situation. Wear self- contained breathing apparatus as fumes or vapours may be harmful.

06. Accidental release measures

Solid objects may be picked up and placed into a container. Liquids or pastes should be scooped up and placed into a container. Wear proper protective equipment while handling these materials. Do not discard as refuse.

Personal precautions: refer to section 8
Environmental precautions: refer to section 13
07. Handling and storage

Handle with care to avoid stings and cuts. Wear gloves when handling welding consumables. Avoid exposure to dust. Do not ingest. Some individuals can develop an allergic reaction to certain materials. Retain all warning and identity labels.


Keep separate from chemical substances like acids and strong bases, which could cause chemical reactions.

08. Exposure controls/ Personal protection

Avoid exposure to welding fumes, radiation, spatter, electric shock, heated materials and dust.

Engineering measures:

Ensure sufficient ventilation, local exhaust, or both, to keep welding fumes and gases from breathing zone and general area. Keep working place and protective clothing clean and dry. Train welders to avoid contact with live electrical parts and insulate conductive parts. Check condition of protective clothing and equipment on a regular basis.

Personal protective equipment:

Use respirator or air supplied respirator when welding or brazing in a confined space, or where local exhaust or ventilation is not sufficient to keep exposure values within safe limits. Use special care when welding painted or coated steels since hazardous substances from the coating may be emitted. Wear hand, head, eyes, ear and body protection like welders gloves, helmet or face shield with filter lens, safety boots, apron, arm and shoulder protection. Keep protective clothing clean and dry. Use industrial hygiene monitoring equipment to ensure that exposure does not exceed applicable national exposure limits. The following limits can be used as guidance. Unless noted, all values are for 8 hour time weighted averages (TWA). For information about welding fume analysis refer to section 10.

09. Physical and chemical properties
Appearance: solid, non-volatile, with varying colour
Melting point: 650-710°C
10. Stability and reactivity
General: This product is only intended for normal welding purposes.
Stability: This product is stable under normal conditions.

Contact with chemical substances like acids or strong bases could cause generation of gas. When this product is used in a welding process, hazardous decomposition products would include those from the volatilization, reaction or oxidation of the materials listed in section 2 and those from the base metal coating. The amount of fumes generated from manual metal arc welding varies with welding parameters and dimensions, but is generally no more than 5 to 15 g/kg consumable.

Fume analysis: Fumes from this product contain compounds of the following chemical elements. The rest is not analyzed, according to available standards.
Fume analysis: Fumes from this product contain compounds of the following chemical elements. The rest is not analyzed, according to available standards.
Ag Cu Sn
40 22 5

Refer to applicable national exposure limits for fume compounds, including those exposure limits for fume compounds found in section 8. A significant amount of the chromium in the fumes can be hexavalent chromium, which has a very low exposure limit in some countries. Manganese and nickel have low exposure limits, in some countries, that may be easily exceeded. Reasonably expected gaseous products would include carbon oxides, nitrogen oxides and ozone. Air contaminants around the welding area can be affected by the welding process and influence the composition and quantity of fumes and gases produced.

11. Toxicological information

Inhalation of welding fumes and gases can be dangerous to your health. Classification of welding fumes is difficult because of varying base materials, coatings, air contaminations and processes. The International Agency for Research or Cancer has classified welding fumes as possibly carcinogenic to humans (Group 2B).

Acute toxicity:

Overexposure to welding fumes may result in symptoms like metal fume fever, dizziness, nausea, dryness or irritation of the nose, throat or eyes.

Chronic toxicity:

Overexposure to welding fumes may affect pulmonary function. Prolonged inhalation of nickel and chromium compounds above safe exposure limits can cause cancer. Overexposure to manganese and manganese compounds above safe exposure limits cam cause irreversible damage to the central nervous system, including the brain, symptoms of which may include slurred speech, lethargy, tremor, muscular weakness, psychological disturbances and spastic gait. Prolonged inhalation of titanium dioxide above safe exposure limits can cause cancer. Inhalable quartz is a respiratory carcinogen however the process of welding converts crystalline quartz to the amorphous form which is not considered to be a carcinogen.

12. Ecological information

Welding consumables and materials could degrade/ weather into components originating from the consumables or from the materials used in the welding process. Avoid exposure to conditions that could lead to accumulation in soils or groundwater.

13. Disposal considerations
Discard any product, residue, disposable container or liner in an environmentally acceptable manner, in full compliance with federal and local regulations. Use recycling procedures if available. USA RCRA: Unused products or product residue containing chromium is considered hazardous waste if discarded, RCRA ID characteristic Toxic Hazardous Waste D007. Residues from welding consumables and processes could degrade and accumulate in soils and groundwater.

Welding slag from this product typically contains mainly the following components originating from the coating of the electrode.
14. Transport information

No international regulations or restrictions are applicable.

15. Regulatory information

Read and understand the manufacturer's instructions, your employer's safety practices and the healthy and safety instructions on the label. Observe any federal and local regulations. Take precautions when welding and protect yourself and others.


Welding fumes and gases are hazardous to your health and may damage lungs and other organs. Use adequate ventilation.

Electric shock can kill. Arc rays and sparks can injure eyes and burn skin.

First Aid:

In case of high concentration of welding fume get a breath of fresh air, wash eyes and skin with water for the removal of powder. Take first aid measures in case of injuries produced by electrical arc radiation or electrical shock and call a doctor immediately.

16. Other information

Carbo Weld requests the users of this product to study this Safety data sheet (SDS) and become aware of product hazards and safety information. To promote safe use of this product a user should: notify its employees, agents and contractors of the information on this SDS and any product hazards/safety information. Furnish this same information to each of its customers for the product. Request such customers to notify employees and customers for the same product hazards and safety information.

To the best of our knowledge, the information contained herein is accurate. However, neither the above- named supplier, nor any of its subsidiaries, assumes any liability whatsoever for the accuracy or completeness of the information contained herein. Final determination of suitability of any material is the sole responsibility of the user. All materials may present unknown hazards and should be used with caution. Although certain hazards are described herein, we cannot guarantee that these are the only hazards that exist.

Contact CARBO-WELD at or 0049 2161 564830 if you have questions about this SDS. American National Standard Z49.1 .Safety in Welding and Cutting., ANSI/AWS F1.5 . Methods for Sampling and analyzing Gases from Welding and Allied Processes., ANSI/AWS F1.1 .Method for Sampling Airborne Particles Generated by Welding and Allied Processes., AWSF3.2M/F3.2 .Ventilation Guide for Weld Fume., American Welding Society, 550 North Le Jeune Road, Miami Florida, 33135. Safety and Health Fact Sheets available from AWS at

OSHA Publication 2206 (29 C.F.R. 1910), U.S. Government Printing Office, Superintendent of Documents, P.O.Box 371954, Pittsburgh, PA 15250-7954
American Conference of Governmental Hygienist (ACGIH), Threshold Limit Values and Biological Exposure Indices, 6500 Glenway Ave., Cincinatti, Ohio 45211, USA.
NFPA 51B .Standard for Fire Prevention During Welding, Cutting and Other Hot Work. published by the Na- tional Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169

WMA Publication 236 and 237, .Hazards from Welding fume., . The arc welder at work, some general aspects of health and safety.

Unfallverh¸tungsvorschriften BGV D1, .Schwei?en, Schneiden und verwandte Verfahren.

CSA Standard CAN/CSA-W117.2-01 .Safety in Welding, Cutting and Allied Processes.
This product has been classified according to the Hazard criteria of the CPR and the SDS contains all the information required by the CPR.

R40 - Limited evidence of a carcinogenic effect.
R43 - May cause sensitization by skin contact.
R45 - May cause cancer.