svi;
Unfortunately, politics with suppliers often play a role in a failure investigation. From your comment,
“Yes, I would have approached the manufacturer. But since the defect has been reported to them and the pipe lot taken off the project. The whole thing becomes political than anything...
Polaris Rush
I looked up the spec you referenced, and I located table M1. The table does reference A569 grades 30/50. Spec A1011 was created about year 2000 and replaced several specs including A569.
A1011 is a hot strip spec that is good up to about .230 inches thickness. It appears that...
Thanks, steelmtllrgst
I agree with you comments, "Agree it would be nice if the "standards were more standardized", if that makes any sense at all... ". So I gave you a Star!
I understand your frustration; in a former life, I worked in the specifications department at a steel mill that made...
Thanks for the inf0 SWALL, I gave you a star. I looked up the spec on IHS standards and the cost is about $63 for a down load.
The IHS website comments on the spec are noted below.
"Attendantly, the ability to predict hardenability from chemical composition has become increasingly important...
DI calculations for harden ability are useful for determining the max material thickness which will have sufficient through wall hardening. Is there a standardized DI calculation that can be place into the specifications that are used for ordering material, or does the purchaser have to specify...
I agree with met engr that you should consider a nickle alloy.
A nickle alloy is not cheap, but after all that special processing you may still fall short on impact properties for such a low temperature. The higher cost may also be ofset by avoiding a service failure.
I reviewed a few Nickle...
Shankarviyer
Your picture of the stamping shows a large variation in “temper colors”. A variation in temper colors often indicates a variation in the cooling rate at both hot and cold rolling mills. Slight variations in temper colors are frequently seen on hot band from many mills. Hot mills...
Shank,
As previously mentioned, leveling and flatness are critical. Coils often have edge wave, center buckle, or quarter buckle that is removed with a tension leveler. ASTM A568 has typical flatness requirements for coil and cut the length (sheet), but your coil is definitely not typical...
Fox9719,
Metengr correctly noted that Astm A109 should be used for ordering purpose, but there are a couple of other minor issues you should note that will affect your order acceptance and availability. A109-08 has a max width of 23”. Your order width ( OUR specs..1020 CRS .023 +/- .003 X...
The final cause of the failure was determined to be hydrogen embrittlement.
The part failure fracture was intergranular, but the fracture surfaces on a tensile and charpy test sample from the same part, had a much different fracture pattern (SEM eval). The tensile sample had some cup and cone...
A part was submitted to our lab that was fabricated from 9Cr1Mo that was in an acidizing well environment (HCL was present, exact concentration or buffer unknown, no info on possible H2S) with a temperature around 275 F. The part exhibits massive corrosion as expected.
The 9Cr1Mo is a quasi...
I have used SteCal software 3.0 for two years, and I would like to get your input regarding your applications, acceptability of data output, and other software that may be comparable or better. Thanks
My impression:
The software is not perfect when comparing actual data to predicted results...
Thanks for the feed back guys. I called to Armoloy and have made some contact to get their imput. The spec on the part was QQ 320 B, class 2. The spec is an old mill spec.
What is the difference between Armoloy’s chrome electro plating and standard hard chrome electro plating? I have had an inquiry about switching from hard chrome plating to an Armoloy plating. One of the sister branches of my employer have positive comments regarding Armoloy.
Armoloy has a web...
I am conducting a failure investigation on a Custom 465, Carpenter alloy. The alloy is newer, late 1990's so their does not appear to be much case histories on failure investigations.
The investigation is on a tubing type structure that is used to contain fluids up to 10 KSI preasure. The...
Hello,
What sources are available for finding the general corrosion rates of carbon steel, stainless, and corrosion resistant alloys in various environments such as Co2, H2S, with different temperature parameters?
