tensile strenght @ elevated temperature for EN materials
tensile strenght @ elevated temperature for EN materials
(OP)
Dear,
I am trying to make pipespecifications with both ASTM and EN materials according B31.3. I have still one remaining problem. For the EN materials I need tensile strenghts at elevated temperatures. In the EN codes these values are impossible to find. The approaching formule derived from B31.3 (calculating with yield strenght-ratio)is far too conservative. Has any got an idea where I can find reliable tensile strenghts or an approved approach
thanks
I am trying to make pipespecifications with both ASTM and EN materials according B31.3. I have still one remaining problem. For the EN materials I need tensile strenghts at elevated temperatures. In the EN codes these values are impossible to find. The approaching formule derived from B31.3 (calculating with yield strenght-ratio)is far too conservative. Has any got an idea where I can find reliable tensile strenghts or an approved approach
thanks





RE: tensile strenght @ elevated temperature for EN materials
If your designing within a Canadian juristiction ensure that your calculations follow the code. to cross reference materials from look into the CASTI Black book.
RE: tensile strenght @ elevated temperature for EN materials
My problem is not the materials listed in ASME II because these are all ASTM materials. My problem is calculating allowable stresses for EN/DIN materials according B31.3! B31.3 provides a formula with 4 'parameters': Rm20/3;Rmtemp/3;Ry20/1.5;Rytemp/1.5 Minimum of these values gives de allowable S. Problem is I can't find Rmtemp, tensile @ temperature,for EN materials. So I am looking for reliable EN-material tensile strenght or equations that approach these values.
B31.3 provides a formula: Rmtemp=(Rytemp/Ry20)*Rm20
Problem is this formula is far to conservative and for my appliciation thus unaccptable.
regards
RE: tensile strenght @ elevated temperature for EN materials
RE: tensile strenght @ elevated temperature for EN materials
I need tensile strenght at elevated temperatures.
RE: tensile strenght @ elevated temperature for EN materials
RE: tensile strenght @ elevated temperature for EN materials
But P265GH would be a good start.
RE: tensile strenght @ elevated temperature for EN materials
http:/
This is relevant to your other thread:
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For P256GH, and wall thicknesses <= 60 mm, minimum proof stress values Rp0.2 are given in MPa (N/mm2). Temp first then value:
100 226
150 213
200 192
250 171
300 154
350 141
400 134
450 128.
There are 21 grades of steel listed.
RE: tensile strenght @ elevated temperature for EN materials
Thanks for to effort you put in trying to help me, but I think you misunderstood my question. The values you give me are Rp0.2 values (= yield strenght). I have full access to all EN-codes so also these values.
My problem are tensile strenghts (Rmtemp)! These strenght values seem impossible to find. [In fact it isnt so strange since EN is based on yield strenght and not (as is in ASME) on tensile.]
RE: tensile strenght @ elevated temperature for EN materials
RE: tensile strenght @ elevated temperature for EN materials
What do you think about converting the EN grade to an ASTM equivalent grade, and then using the ASME allowable for that? I think the only way that you can obtain elevated temperature tensile strength data is from steel tube suppliers in the EU. I would start by contacting Dalmine/Tenaris.