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The "discovery" of stainless steel occured in the 1900 to 1915 time period. However, as with many discoveries, it was the accumulated efforts of several individuals that actually began in 1821. That year a Frenchman named Berthier found that iron when alloyed with chromium was resistant to some acids. Others studied the effects of chromium in an iron matrix, but using a low percentage of chromium. To be stainless steel, the chromium content needs to be at least 10.5%. In 1872, Messrs. Woods and Clark applied for a British patent for what they identified as an acid and weather resistant alloy containing 30 to 35% chromium and 1.5 to 2% tungsten. Then, in 1875, another Frenchman named Brustlein recognized the importance of carbon levels in addition to chromium. Stainless steels need to have a very low level of carbon at 0.15%. While many others investigated the chromium/iron composition, the difficulty in obtaining the low carbon levels persisted for many years until low carbon ferrochrome became commercially available.
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Plastic Travel Mug (77) Stainless Steel Insulated Mug (108) Animal Mug (78) Plastic Cup (199) Vacuum Flask Set (25) Paper Cup (22) Tea Set (15) Kid Water Bottle (23) Tea Maker (42) Glass Cup (38) Plastic Mug (55) Metal Travel Mug (27) Vacuum Flask (40) Shrink Cup (7)

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Stainless Steel Vacuum Flask
ID: hp-23305
Insulation Cup
ID: HP-026533
Bachelor Cup
ID: HP-026534
Care Cup
ID: HP-026514
Insulated cup
ID: HP-024502
Stainless Steel Cup
ID: HP-024454
Stainless Steel Cup
ID: HP-024455
Stainless Steel Cup
ID: HP-024447
Stainless Steel Mug
ID: HP-024082
Stainless Steel Mug
ID: HP-024083
Stainless Steel Mug
ID: HP-024088
Stainless Steel Mug
ID: HP-024089
Car Cup
ID: HP-023827
Vacuum cup
ID: HP-022002
Tailless vacuum cup
ID: HP-022001
Purple sand straight cup
ID: HP-022000
Vacuum clear drinking glass
ID: HP-021998
450 tailless vacuum lozenge cup
ID: HP-021997
360 Longfeng cups
ID: HP-021996
Vacuum cup
ID: HP-022004

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