Friends,
We have a situation in which, we have welded SS 2205 (UNS S2205) grade duplex steel to Nitronic 50 (UNS S20910) grade of steel. The whole unit was then subjected to a corrosion test per ASTM A923 and we have observed extensive pitting corrosion on the Nitronic side of the weld. My...
Hi All!
We are working on a job to make forgings to a GE spec BA50A420.
We are at a loss to understand to what standard spec, such as AISI,ASTM,SAE or UNS can this grade be purchased.
The percentage composition of key elements is as follows;
C 0.25% - 0.33% - Mn 0.20% - 0.80% - Si 0.35% max...
Hi All!
We made our first flange in the 17-4PH / AISI 630 grade. After forging we performed post forge thermal treatment and later aged it to achieve a hardness of 330/335 BHN. So far so good.
In the next step, we intend to machine the part and then subject it to a sub-zero quench at -60 deg...
Hi All!
We have some parts that are finish machined and made of SA182 F11 material. These were originally qualified for SA182 F11 - Cl 1, in the Normalized and tempered condition. Now the customer wants it to be qualified as SA182 F11 - Cl 2. We need to quench and temper the parts that are...
Hi All!
One of our customer needs a forged nozzle for a high temperature (1863 deg F)and pressure (100 psi) application. Customer wants us to quote with suitable material. We are planning to offer Incoloy- 800HT for this application. However we have not been able to find any data to...
Friends!
I have a question (probably a dumb one) regarding Forging work ratio. We have a situation with a new product that we forge from a rectangular Continuous cast bloom 23.6" X 14.6" cut to 17.125" length. The forging was finished to size 17"X 18.125" X 17.125" in about 38 reduction steps...
Hello Friends!
I have a question regarding SA182-F51 duplex SS.
We have a customer asking for charpy values of 25/33Ft-lb at -50 deg F. We have no exposure to this steel and we are not sure if this is achievable. In fact we need to carry out heat treatment trials to achieve a 35 -50% Ferrite...
Hi All!
We are looking for an equivalent AISI grade for the subject material. Would anybody know if there is an equivalent AISI/UNS number. It is also identified as X4CrNiMo 16-5-1, which simply means 16% Cr, 5% Ni & 1% Mo. Is there any mill in the US making this grade?
I guess the next...
Hi folks!
I have a question regarding the effect of Niobium (or Columbium) on welding. We have a requirement for forging a modified SA182 F22 grade (with 2.0% Cr max) and achieve an Yield stress of 80 ksi (min). The application is a sour, under water service and welding is involved. With...
Hi Guys!
I have a question regarding Alloy factor.
A customer has specified an alloy factor of 20 (minimum)
for AISI 4130 steel (& CE = 0.65%). I have seen an alloy factor formula for low alloy carburizing grade steel (But that works out to around 1). While, we understand the CE part we are...
Hi All!
We have a customer who specifies a minimum 4:1 work ratio on the parts forged for them. We need to certify the same. We buy pre-forged rounds and squares with a 2:1 work ratio already done on them. The problem we have now; Is the work done on the stock additive or multiplicative...
Hi! All,
I have a question regarding P.C.E.
I've heard of C.E. - Carbon Equivalence and use it all the time. But what is P.C.E and what does it signify??
Any help? [bigears] :-)
Is there a heat treat reference book that deals with both the theoretical aspects and practical approach to heat treatment? I'm actually looking for a reference book that is a combo of ASM hand book (Heat treatment Vol-4) and ASM -Heat treaters guide?
Appreciate any help.
