Welding Technics Wiki
SCHEDULE OF THE PROTECTION SHADES AT PROTECTIVE WELDING GLASSES
Eye protection from optical radiation, but also from splashes and slag is of great importance during welding process. Therefore one absolutely has to wear goggles or a helmet with protective glasses whilst these works. These protective welding glasses are available in different shades – the higher the figure of the shade the darker is the protective glass.
The chosen protective glass should be coordinated with the welding work. Only so optimum security and a good visibility on the object can be guaranteed.The following works already can be made with low shades:
- Shade 1,7 to 3: Light oxygen cutting works, flame cleaning, light alloy welding, welding aid
- Shade 4: Welding and brazing to 70 ltr. acetylene/hour, flame cutting to 900 ltr. oxygen/hour, steel- and grey cast iron welding, light alloy welding
- Shade 5: Welding and brazing with 70 to 200 ltr. acetylene/hour, flame cutting with 900 up to 2.000 ltr. oxygen/hour
- Shade 6: Welding and brazing with 200 to 800 ltr. acetylene/hour, flame cutting with 2.000 up to 4.000 ltr. oxygen/hour
- Shade 7: Welding and brazing with more than 800 ltr. acetylene/hour, flame cutting with 4.000 up to 8.000 ltr. oxygen/hour
- Shade 8: Flame cutting with more than 8.000 ltr. oxygen/hour
The higher shades are mainly required for arc welding. Here the ampere number is decisive for the chosen shade.
| Welding process | Shade | ||||||
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | |
| MIG at heavy alloy | to 125 A | to 175 A | to 250 A | to 350 A | to 450 A | to 500 A | |
| MIG at light alloy | to 175 A | to 225 A | to 300 A | to 400 A | to 500 A | ||
| MAG | to 70 A | to 100 A | to 150 A | to 225 A | to 400 A | to 600 A | ab 600 A |
| WIG | to 30 A | to 70 A | to 125 A | to 200 A | to 300 A | to 350 A | |
| Gouging | to 175 A | to 200 A | to 250 A | to 350 A | to 450 A | ||
| Plasma cutting | to 125 A | to 150 A | to 175 A | to 250 A | to 400 A | ||
| E-hand weldingn | to 60 A | to 100 A | to 150 A | to 200 A | to 300 A | to 450 A | to 600 A |
EN399 LEATHER GLOVES
When we are talking about welding gloves then one material can convince the most: Leather.
It offers many qualities which are important whilst welding. Gloves made of full leather convince by its high strength. Moreover such gloves are oil- fat- and water repellent. Due to the material thickness the gloves are relatively rigid.
However more flexibility is offered by gloves of a full leather- and split leather combination. Here the gloves consist of several thin leather layers that are one upon another. Here the outer layer is full leather - so it offers nearly the same advantages like full leather gloves. The inner layers consist of the inner layers of the animal skin. Because of so many layers working with much more sure instinct is possible.
Moreover there are gloves of pure split leather. These have a more rough fibrous structure and offer a strong grip. Therefore such gloves are very resistant also against cuts. Because of its high absorption of humidity such split leather gloves mainly should be used in dry areas.
All our leather gloves are checked according to DIN norm EN 399.
COLOUR CODING TUNGSTEN ELECTRODES
green (WP)
This electrode is used for welding of aluminium, magnesium, nickel and alloys at heterodyne alternating-current. It is not suitable for direct-current weldingyellow (WT10)
WT10 is mainly used at direct-current welding (electrode on the minus pole) of carbon steel and stainless steel. The electrode contains 1% thorium oxide and is having many uses at welding of rust-, acid- and heat resistant steel like copper, tantalum or titanium.red (WT20)
The electrode WT 20 contains the double quantity of the radioactive element thorium oxide (2%) than WT 10. It is used in the same fields and offers higher ignitibility, higher tool life and better current load compared to WT 10.orange (WT40)
With its 4% thorium oxide WT 40 offers the characteristics of WT 10 in an improved way. Moreover the arc is more stable at this electrode.grey (WC20)
WC20 is an universal electrode that nearly can be used everywhere: At direct-current and alternating-current, unalloyed and highly alloyed steel or at aluminium-, nickel-, copper-, magnesium- or titanium alloys. The cerium oxide electrode convinces with a high edge life, good current load and non-polluting.black (WL10)
This electrode is most suitable for plasma cutting and plasma- resp. micro plasma welding.gold (WL15)
WL15 is used in the same application fields like WC20. The lanthanum oxide electrode is radiation-free and offers high ignitibility.blue (WL20)
This electrode with 2% lanthanum oxide is used in the automated welding process. It convinces with a high edge life and good ignitibility.white (WZ8)
Concerning application and characteristic WZ8 is only a little bit different to the blue marked electrode WL 20. The only difference is that it’s of 0,8% zirconium oxide.turquoise (WR2)
No matter if all WIG- and plasma welding processes, automated processes or also aluminium. WR2 is having many uses. The high edge life and the large ignitibility are further points gained – and moreover using WR 2 is not dangerous to health and environment since the electrode is radiation-free.