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EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20
sanzhong
AWS A5.12 A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD.pdf
TUNGSTEN ROD
100PCS/pack
China
EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20
international standard
ISO, CE, DB
accept ODM also
1kg / 5kg / 20kg
7-15 Days
1000 PCS
0.8mm / 0.9mm / 1.0mm / 1.2mm / 1.6mm / 2.0mm / 2.5mm / 3.2mm
025 / 030 / 035 / 040 / 045 / 0.030
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AWS A5.12 / A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD covers non-consumable tungsten electrodes (TUNGSTEN ROD) in accordance with AWS A5.12 / A5.12M, designed for TIG (GTAW) and plasma welding applications. The range includes pure tungsten, thoriated, ceriated, lanthanated, zirconiated, and composite types to meet various current requirements (DC/AC) and base material compatibility.
AWS A5.12 A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD.pdf
Common Name | AWS | ISO | Tip Color Code | Key Composition |
Pure Tungsten | EWP | WP | Green | W ≥ 99.5% |
2% Thoriated | EWTh-2 | WT20 | Red | ThO₂: 1.70 – 2.20% |
2% Ceriated | EWCe-2 | WC20 | Orange / Grey | CeO₂: 1.80 – 2.20% |
1% Lanthanated | EWLa-1 | WL10 | Black | La₂O₃: 0.80 – 1.20% |
1% Zirconiated | EWZr-1 | WZ8 | Brown | ZrO₂: 0.15 – 0.40% |
Composite Multi-Element | EW-G | WG | Grey | Mixed Rare Earth Oxides |
AWS A5.12 A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD is used in welding carbon steel and stainless steel, surfacing transition metal on the inner wall of reaction vessel in petrochemical industry, or in martensite and ferrite stainless steel with poor toughness.
Diameter Range: 0.25 mm to 10.0 mm (0.010 to 0.250 inches) with specific tolerances by size .
Standard Lengths: 150 mm and 175 mm are common; lengths from 50 mm to 600 mm are available .Surface Finish: Smooth and uniform, free from defects .Straightness: Within specified limits (e.g., ≤0.5 mm per 100 mm length) .
Marking & Identification
Color Coding: All electrode tips must have a clear, durable color mark matching the classification .
Packaging: Must indicate classification, size, batch number, and manufacturer, with adequate protection .
Quality & Traceability
Chemical Analysis: Composition is verified via standard test methods .
Certification: Materials are certified to meet AWS A5.12/A5.12M .
The primary identification for these tungsten electrodes relies on AWS classification, color codes, and chemical composition limits, as specified in AWS A5.12/A5.12M.
Identification Method Detail
AWS Classification EWTh-2, EWCe-2, EWLa-1, EWZr-1, EW-G
Color Code Red (EWTh-2), Grey (EWCe-2), Black (EWLa-1), Brown (EWZr-1), Grey (EW-G)
Key Composition Contains specific oxide dopants (e.g., ThO₂, CeO₂, La₂O₃) within defined percentage ranges
The AWS A5.12 specification requires that each electrode type be clearly identified by its color code to prevent confusion during use.
Primary Packaging
Electrodes are typically packed in quantities such as 10 pieces per pack inside protective containers. Common packaging options include sealed aluminum tubes to
protect against oxidation and damage, or plastic boxes within an outer shock-resistant carton.
Protective Function
Packaging must be designed to protect electrode surfaces from all damage or staining during proper transport and storage. This includes protection against moisture
and physical damage.
Package Marking
The following information must be legibly marked on the outside of each package:
• Standard number (AWS A5.12M/A5.12)
• Electrode diameter and length
• Net quantity of electrodes
• Supplier's name and trade designation
• Lot, control, or heat number
Warning Label
Appropriate precautionary information, at a minimum as given in ANSI Z49.1, must be prominently displayed in legible print on all packages. This is especially
important for thoriated types (EWTh-2) due to their radioactive content.
Overpacking
Marking on any overpacking that contains unit packages is optional and at the manufacturer's discretion.
In summary, while the specific packaging details (like aluminum tubes vs. plastic boxes) can vary by manufacturer, the AWS standard requires that all packaging
ensures product protection, clear identification, and proper safety warnings.
The primary warning for these tungsten electrodes is that grinding them generates hazardous dust; for thoriated types (EWTh-2/WT20, red tip), this dust is radioactive
and carcinogenic.
1. Radioactive Hazard (EWTh-2/WT20 only)
Thorium dioxide is radioactive and a known carcinogen. The greatest risk is inhaling or ingesting dust during grinding, which can cause cancer. α-particles cannot
penetrate skin but are harmful if inside the body.
2. Grinding & Ventilation
Do not breathe dust/fumes.
Grind only in well-ventilated areas with local exhaust ventilation (dust extraction) to capture dust.
Wear respiratory protection (e.g., a dust mask) when grinding.
3. General Safety
Wash thoroughly after handling.
Keep out of eyes: Dust/fumes may cause eye irritation.
Protect yourself: Read Safety Data Sheets (SDS) and employer's safety practices before use.
Contaminated work clothing should not leave the workplace.
AWS A5.12 A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD 10 famous brand are which factory?
1:sanzhong, 2:giant, 3:safra, 4:Hobart, 5:SAF, 6:ALCOTEC, 7:INDALCO, 8:HYUNDAI, 9:Oxford, 10:golden bridge
AWS A5.12 A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD supplier and factories locates in such countries like?
China,America,Brazil,England,Russia,Poland,India,Pakistan,NewZealand,Korea,Australia,Dubai,Turkey,Indonesia,UAE.
AWS A5.12 A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD have how many types?
EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD
How to choose a suitable AWS A5.12 A5.12M EWTh-2、EWCe-2、EWLa-1、EWZr-1、EW-G、WT20 TUNGSTEN ROD?
The key to choosing the right tungsten electrode from the AWS A5.12/A5.12M family is matching its properties to your welding current type (AC or DC) and base material. While several types are versatile, some have clear advantages for specific jobs.
Here is a quick guide to help you select the right one:
EWTh-2 (Red)
DCEN (DC Electrode Negative)High current capacity, good arc starting. Ideal for welding carbon steel, stainless steel, nickel alloys, and titanium.
Note: Slightly radioactive; use with caution.
EWCe-2 (Grey)
AC / DC
Excellent low-current arc starting, non-radioactive. A popular alternative to thoriated tungsten for both AC and DC welding.
EWLa-1 (Black)
AC / DC
Versatile, non-radioactive, and an excellent general-purpose replacement for thoriated. Performs well on both AC and DC.
EWZr-1 (Brown)
AC
High resistance to contamination, good current capacity. The preferred choice for AC welding of aluminum and magnesium,
especially when using older transformer-based machines.
EWP (Green)
AC
The most basic, least expensive option. Limited use but can be used for AC welding of aluminum and magnesium.
EW-G (Grey)
AC / DC
Multi-dopant (Rare Earth / Tri-Mix) electrode. Offers a combination of properties for enhanced performance, often used in automated welding.
Here is a quick guide to help you select the right one:
For most DC welding (steels, titanium): EWTh-2 (Red) has been the traditional choice, but you can now get comparable performance with
non-radioactive options like EWLa-1 (Black) or EWCe-2 (Grey).
For AC welding (aluminum, magnesium): EWZr-1 (Brown) is a reliable choice for standard machines. However, for modern inverter machines,
the non-radioactive EWLa-1 and EWCe-2 electrodes are also excellent options.
Safety First: The most important consideration is that EWTh-2 is radioactive. Grinding it produces hazardous dust, so you must use a local exhaust
system and wear a respirator. For this reason,
many professionals are switching to non-radioactive alternatives like EWLa-1 (Black) or EWCe-2 (Grey).
With our experience, innovation, integrity, and professional attitude, we are determined to continuously serve our customers' need and expectations.
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