Grade Identification - possible 347 variant?
Grade Identification - possible 347 variant?
(OP)
Was wondering if anyone could offer some advice on the following material.
Used as in a valve seat, operating at high temperatures (540 C)
Composition analysis was undertaken (XRF machine), giving the following results
Cr 17%
Ni 12.3%
Mo 1.4%
Nb 0.8%
V 0.9%
(Fe Balance)
Material is non-magnetic
Was wondering if anyone had any ideas what grade material this might be? It appears to be similar to a 347, but with V and Mo additions.
Also, does anyone have any ideas how we might weld it? (heat treatment, consumable?) At this time, we're thinking about using a NiCr3 or 347 consumable, and welding it like an austenitic stainless grade. However, the V content has us a little worried.
Thanks in advance
Used as in a valve seat, operating at high temperatures (540 C)
Composition analysis was undertaken (XRF machine), giving the following results
Cr 17%
Ni 12.3%
Mo 1.4%
Nb 0.8%
V 0.9%
(Fe Balance)
Material is non-magnetic
Was wondering if anyone had any ideas what grade material this might be? It appears to be similar to a 347, but with V and Mo additions.
Also, does anyone have any ideas how we might weld it? (heat treatment, consumable?) At this time, we're thinking about using a NiCr3 or 347 consumable, and welding it like an austenitic stainless grade. However, the V content has us a little worried.
Thanks in advance





RE: Grade Identification - possible 347 variant?
Whoever finds this one, please tell us where you found this information.
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/
RE: Grade Identification - possible 347 variant?
What type of valve - boiler stop valve, turbine throttle valve, pump, etc?
RE: Grade Identification - possible 347 variant?
Component Wt. %
C Max 0.06
Cr 20.5 - 23.5
Fe 51.9 - 62.1
Mn 4 - 6
Mo 1.5 - 3
N 0.2 - 0.4
Nb 0.1 - 0.3
Ni 11.5 - 13.5
P Max 0.04
S Max 0.03
Si Max 1
V 0.1 - 0.3
RE: Grade Identification - possible 347 variant?
I have seen stabalized 316 chemistries, but this looks wrong to me also.
We need better numbers.
Is there a chance that this item was coated? That could mess up the analysis.
= = = = = = = = = = = = = = = = = = = =
Rust never sleeps
Neither should your protection
http://www.trent-tube.com/contact/Tech_Assist.cfm
RE: Grade Identification - possible 347 variant?
22%Cr
12.5% Ni
2% Mo
5% Mn
0.2% Cb
0.2% V
0.3% N
Its close but not quite right.
Also there is a UNS S21500 or EN 1.4893 (Tradename Esshete 1250)
10% Nickel
15% Chromium
1% Mo
0.6% Mn
with Nb, V, and B additions.
These are listed in Rolled Alloys bulletin 1048, but we don't sell either of them.