High chrome grade similar to 420
High chrome grade similar to 420
(OP)
I have a print with Worknorm 1.4122 on it the chemistry is as follows:
X35CrMo17 DIN
I am not able to find a common USA grade of SS that can fit this chemistry. The part is a sort of spring clip so it seems that I need a martensitic grade, however the Cr content in the above is much higher than in the martensitic grades like 420. I would like to avoid sugesting a PH stainless as there is no forming involved. Is there a high chrome grade similar to 420, or alternately is there an american grade I should recommend?
Thanks In advance.
nick
CODE
0.33-0.45 C:Carbon
=1.00 Mn:Manganese (nominal?)
=1.00 Si:Silicon (nominal?)
0.04 P:Phosphorus (max?)
0.015 S:Sulfur (max?)
15.5-17.5 Cr:Chrome
0.80-1.30 Mo:Molybdenum
=1.00 Ni:Nickel (nominal?)
=1.00 Mn:Manganese (nominal?)
=1.00 Si:Silicon (nominal?)
0.04 P:Phosphorus (max?)
0.015 S:Sulfur (max?)
15.5-17.5 Cr:Chrome
0.80-1.30 Mo:Molybdenum
=1.00 Ni:Nickel (nominal?)
X35CrMo17 DIN
I am not able to find a common USA grade of SS that can fit this chemistry. The part is a sort of spring clip so it seems that I need a martensitic grade, however the Cr content in the above is much higher than in the martensitic grades like 420. I would like to avoid sugesting a PH stainless as there is no forming involved. Is there a high chrome grade similar to 420, or alternately is there an american grade I should recommend?
Thanks In advance.
nick





RE: High chrome grade similar to 420
What is the specific application because depending on service you have several martensitic stainless steel choices;
Carpenter or Allegheny Ludlum 440A , which has the chrome range but less Mo and nickel at 0.5%.
Carpenter Type 431 - which has the chrome range, less carbon, and slightly higher nickel, no moly
Allegheny Ludlum Type 425 Mod - lower chrome range (13-14), Mo within range, nickel at 0.5%, carbon at 0.5-0.55%
Other than the slightly lower chromium range, it would appear that the Allegheny Ludlum Type 425 Mod is a close match, especially for the carbon range.
RE: High chrome grade similar to 420
I noticed the 425Mod, I'm worried that the lower Cr, combined with the higher C and lower Ni will not provide the customers required corrosion resistance.
This is just a "make to print" quote. I've got really no information on operating environment.
So now I have a new question:
Will ~2.5-3.5% lower Cr, ~.1% higher C, and ~.5% less Ni cause a significant change in the corrosion resistance of a spring tempered part?
Thanks metengr
nick
RE: High chrome grade similar to 420
why dont you just use 1.4122 material ?
Best Regards
Richard Buss
RE: High chrome grade similar to 420
RE: High chrome grade similar to 420
Israelkk- We currently use signifcant amounts of a modified 420 in coil form. (note designated as 7C27Mo2 by Sandvik MT) Its a 420SS with a moly addition to provide better corrosion resitance and fatigue strength in mildly corrosive atmospheres.
Thanks guys.
nick
RE: High chrome grade similar to 420
RE: High chrome grade similar to 420
http://mdmetric.com/tech/matnr2.htm
Since the Sandvik mtl. is so close and we use so much of it Thats what I will reccommend to the Project Eng. After that if our customer will approve the print change then we will sail through....
Thanks and stars round....
nick
RE: High chrome grade similar to 420
although my company is in Germany we produce and stock 1.4122. Let me know what size you need and ill give you a price indication to the US.
website is www.doerrenberg.de
e-Mail richard.buss@doerrenberg.de
regards
Richard