I had the opportunity to test these electrodes last night. At +45 amps DC I had no problem starting and maintaining the arc. Just out of curiosity I had a dirty piece of SS and no problems at all. When working with SS you should only use the special SS brush! It is necessary! The price of these electrodes is unbeatable. This is the cheapest way to weld SS. hands down Best product on the market for the price! I WILL BUY AGAIN