hi, all,
we have an un-abnormal corrosion happened on the surface of a SS400 plate, and i would like to ask you guys to give me an instruction on how to analyze the oxide. i will post a few photos of the oxides to you for your reference. the corrosion plate was returned from the customer and...
hi,
the customer have a hollow cylinder and stepped button (our product)welded together. both of the cylinder and stepped button are made of 316L SS. and they have a lap joint. the size of hollow cylinder is 14mm long and 0.3mm thick; and its diameter is about 9mm; our product is 2.5mm thick...
hi,
guys, i need your help.
i have a terminal, there is 3 pins in it and they are made of copper core wire with jacket 446 stainless steel.
the terminal was returned from one customer, and it was found that one of the pins was broken. on the broken pin's surface , i found serious corrosion as...
hi,
could anyone tell me how the unnormal microstructure form in the attached file?
what i know about the material is: its grade is SAE1018, and the raw material is round bar.
does that make the properties worse, any idea is appreciated.
hello all,
recently, we want to use hot-rolled plain carbon steel and we list grain size and HV requirements in spec. however, the steel supplier said they couldn't provide this information, the reason they gave is"so many years, for acid pickle coil steel, there is no any customer to list...
dear all,
recently we have a crack issue in our 304ss bar and large inclusions were found along the crack. the sample was prepared and tested with SEM/EDS. attached is two figures of the test results, pls. review. could anyone tell me what is the source of the Mg, Ti, Mn and the other...
dear all,
here is my problem: the substrate is 52 alloy pin, and we firstly electroplated nickel on it, then palladium. the thickness of nickel coating is 3 micrometers and that of palladium is 1 micrometer. after some kind of heat-treatment(which i can't tell), there are white spots (can be...
hi,
i need your help.i really don't know what specific grade of the material is, but it is said probably to be SPCC, low carbon steel.but i didn't seen the similar micro structure before in low carbon steel. i send to do chemical analysis, but the test is not finished yet. attached is the OM...
hi guys,
recently when i was reading a book, there was a photo that was a back-scatted electron imagine used to shown the voids of the failed HP45. i wonder why don't use the secondary electron imagine? attached is the picture. appreciated if any help. thanks in advance.
hi,
in JIS spec, spcc has 6 hardness condition:1/8H,1/4H,1/2H,H,standard and annealed state.as we know, different hardness state corresponds different cold working or tempering condition, so to be different Y.S/U.T.S ratios, am i right? so what i really want to know is what's the effect of...
hi, guys;
we want to purchase SAE1010, but we have problems with its mechanical properties which we couldn't find in SAE specifications. we use SAE J403 specification as reference for its chemical composition and no problems. as far as i know, SAE1010 is CS type, grade 1. but mechanical...
hello,
Is that possible to spot/fusing weld a copper alloy(any grade)with stainless steel? If not, what is the reason, welding metallurgy problem or anything also? i have made an search but i don't get a clear answer. Any suggestion will be much appreciated.
Thanks in advance.
