Patent ID: 8628861

Claim:
A steel form that passes a 0T-bend Advanced T-Bend Test and has a stainless steel exterior, the steel form comprising: a core region, a bonding region and a stainless steel region; the core region metallurgically bonded to the stainless steel region by the bonding region; the core region comprising at least 55 wt. % iron; the stainless steel region having a thickness of about 5 μm to about 250 μm , having a stainless steel composition, and including the stainless steel exterior, the stainless steel composition having a chromium concentration of about 10 wt. % to about 30 wt. % that varies by less than 5 wt. %; and the bonding region positioned between the stainless steel region and the core region, the bonding region having a thickness that is greater than 1 μm and less than the thickness of the stainless steel region, and having a bonding composition, the bonding composition having a chromium concentration proximal to the stainless steel region that is approximately equal to the chromium concentration of the stainless steel region and having a chromium concentration proximal to the core region that has less than about 5 wt. % chromium; wherein the steel form passes the 0T-bend Advanced T-Bend Test.