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Some medical one time use surgical devices use 410 stainless vs. 300 series stainless. Using 410 is important for tensile strength and hardness compared to 304.
My client is tied up in knots because a few cosmetic blemishes of apparent surface rust discolorations on their product.
The steel went through cleaning, brushing, alkalia soak and passivating process with Nitric (4) ASTM treatment. After sitting on shelf less than 2 weeks, it started to develop discoloration spots with rust like color. Not streaky but like tiny drops or sprinkles.
Since the device will not be used for surgery more than 1 hour/not implantable and with iron stain only on surface, I can't really see what the screaming is about.
In designs, has anyone else seen this in a device and was there a resolving action?
My client is tied up in knots because a few cosmetic blemishes of apparent surface rust discolorations on their product.
The steel went through cleaning, brushing, alkalia soak and passivating process with Nitric (4) ASTM treatment. After sitting on shelf less than 2 weeks, it started to develop discoloration spots with rust like color. Not streaky but like tiny drops or sprinkles.
Since the device will not be used for surgery more than 1 hour/not implantable and with iron stain only on surface, I can't really see what the screaming is about.
In designs, has anyone else seen this in a device and was there a resolving action?
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