ASTM A 516 grade 70 properties
ASTM A 516 grade 70 properties
(OP)
Hi!!!
I´m searching the following data for ASTM A 516 grade 70:
-Thermal Conductivity
-Metal density
-Specific Heat
I´ve searched in sect 2 of ASME but I just got the termal conductivity (I think is material group b) and I found that this value is between 26 to 20 btu/hr*ft2*F depending of the temperature. I also searched in a page called matweb and I found something but I do not know if this website is trustworthy because the value for termal conductivity appears as 361 btu/hr*ft2*F. How I see a big difference of value between both sources, I trust more in what in ASME sect 2 appears. So the other data shown in the website matweb...I do know if these values are correct.
Can you help me where I can obtain a trustworthy data for SA-516-70?
Thank you very much
I´m searching the following data for ASTM A 516 grade 70:
-Thermal Conductivity
-Metal density
-Specific Heat
I´ve searched in sect 2 of ASME but I just got the termal conductivity (I think is material group b) and I found that this value is between 26 to 20 btu/hr*ft2*F depending of the temperature. I also searched in a page called matweb and I found something but I do not know if this website is trustworthy because the value for termal conductivity appears as 361 btu/hr*ft2*F. How I see a big difference of value between both sources, I trust more in what in ASME sect 2 appears. So the other data shown in the website matweb...I do know if these values are correct.
Can you help me where I can obtain a trustworthy data for SA-516-70?
Thank you very much





RE: ASTM A 516 grade 70 properties
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Plymouth Tube
RE: ASTM A 516 grade 70 properties
From Section II, Part D, Table TCD, SA-516-70 would be classified as Group 1, because Note 1 says: and SA-516-70 indeed has the Nominal Composition of "Carbon Steel".
Therefore, your value of thermal conductivity ranges from 60 W/(m*K) (34.7 BTU/(hr*ft*°F)) at 38°C (100°F) to 26.8 W/(m*K) (15.5 BTU/(hr*ft*°F)) at 816°C (1500°F).
MATWEB reports an overall range of thermal conductivities for "Low Carbon Steels" of 25.3-93.0 W/(m*K) or 176-645 (BTU*in)/(hr*ft²*°F). Notice the units shift?
The ASME Section II, Part D, Table TCD values are consistent.
As far as specific heat capacity, that data also exists in Table TCD, but it is hidden in the Thermal Diffusivity (TD) column. See General Note (a).
As far as density goes, that is provided in Table PRD, also in Section II, Part D. Lucky for all of us, density is not a strong function of temperature, in metals.
RE: ASTM A 516 grade 70 properties
Thermal conductivity varies more based on composition than do any other physical properties.
The values of ( and temperature dependence) density, modulus, heat capacity, and even thermal expansion are only very slightly impacted until you start adding 2% Cr or 1% Mo to a steel.
One interesting thing about thermal conductivity is that it very similar for all steels (even highly alloyed grades) at 1500F (800C). The significant variation is only at room temp.
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Plymouth Tube
RE: ASTM A 516 grade 70 properties