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Q: engineering standards for Steel tubing ( Answered,   0 Comments )
Question  
Subject: engineering standards for Steel tubing
Category: Science > Physics
Asked by: bob365-ga
List Price: $100.00
Posted: 28 Aug 2002 17:24 PDT
Expires: 27 Sep 2002 17:24 PDT
Question ID: 59674
I need a comparison of steel manufactured to ASTM A513 standard and
manufactured to eastern european standard St 37.4/ DIN 1630. both are
engineering standards, the eastern european one is usually found in
russian which i can't read, or german wiothout the benefit of
translation. I am trying to find a comparison that shows that steel
tubing manufactured to the St 37.4 standard is as storng or stronger
than steel tubing manufactured to the ASTM A513 standard.
Answer  
Subject: Re: engineering standards for Steel tubing
Answered By: kyrie26-ga on 29 Aug 2002 01:09 PDT
 
Hi bob365-ga,

Thank you for your most interesting question! I had a fun time
researching this and learned a little more about steel industry
standards.

Using "tensile strength" as the key determinant in answering your
question, my search unearthed many websites that consistently
published the standard range for DIN 1630 / St 37.4. I then converted
this from metric to imperial values, and compared them to the tensile
strengths for different grades of ASTM A513 as found on one Web page.
Using the most commonly found ASTM A513 grades, it would appear that
your suspicion can be verified, that "the St 37.4 standard is as
strong or stronger than steel tubing manufactured to the ASTM A513
standard". However, the ASTM A513 grades do vary somewhat, so it
depends what grade you are comparing with. I've broken down my
analysis into three discrete steps :


A. ==== TENSILE STRENGTH OF DIN 1630 / St 37.4 ====

Judging from a large number of web pages, including the following
ones, it looks like the tensile strength specified by DIN 1630 / St
37.4 falls within the 350.0 - 480.0 N/mm range :

+-------------------------------+

Sinarsky Pipe Works (Products)
DIN 1630 : SEAMLESS TORUS TUBES FROM NOT ALLOYED STEEL FOR EXTREMELY
HIGH REQUIREMENTS
http://www.sinarsky.ru/eng/prod7.html

----Table 30----
Material : St 37.4 
Material NO : 1.0255 
Tensile strength, R m , N/mm : 350.0 - 480.0 
Yield strength, min., R EN , N/mm : 235.0
Elongation, min., A 5 , by cent : 25.0

+-------------------------------+

e-pipe Korea
DIN 1630-84 SEAMLESS CIRCULAR TUBES OF NON ALLOY STEELS WITH VERY HIGH
QUALITY REQUIREMENTS
http://www.e-pipe.co.kr/eng/DIN/1630.htm

----Table 3----
Steel grade (Symbol, Material Number) : St 37.4, 1.0255 
Upper yield stress | ReH | for wall thicknesses, in mm, (N/ min.) :
	up to 16 : 235
	over 16 up to 40 : 225
	over 40 up to 65 : 215
Tensile strength Rm | N/ : 350 3) to 480
Elongation after fracture A5 (% min) :
	longitudinal : 25
	transverse : 23
Impact energy 1 (ISO V-notch test pieces at+20 (J min.) :
	longitudinal : 43
	transverse : 27

+-------------------------------+

Metric Seamless Tube
http://www.parker.com/tfd/bulletinpdf/MSTwall.pdf

Material : St 37.4 fine-grain quality per DIN 1630
Tensile Strength : 340 N/mm2 (49,000 lb/in2) minimum

+-------------------------------+

Metric Seamless Steel Tubing
http://www.flanges-au.com/products/002.htm

Material : ST37.4 according to DIN 1630  Material No 1.0255
finegrained quality
Tensile Strength Rm inN/mm2 :  350…480 

+=================+




B. ==== CONVERTING BETWEEN  N/mm  and  psi (pound per square inch)
====

Convert-me.Com Weight and Mass conversion
http://www.convert-me.com/en/convert/weight
1 N = 0.102 Kg

Convert-me.Com Pressure conversion
http://www.convert-me.com/en/convert/pressure
1 psi = 0.07031 Kg/cm2

Therefore 1 psi = .07031/0.102 N/cm2  =  0.6893 N/cm2

Convert-me.Com Area conversion
http://www.convert-me.com/en/convert/area
1 cm2 = 100 mm2

Therefore 1 N/cm2 = 0.01 N/mm2

Therefore 0.6893 N/cm2 = 0.6893 X 0.01  N/mm2  =  0.006893 N/mm2

Therefore 1 psi = 0.006893 N/mm2

+-------------------------------+

THEREFORE Tensile strength of DIN 1630 / St 37.4,  
... with a range of :  350.0 to 480.0  N/mm2
is equivalent to a range of :  50,776 to 69,636  psi
... with a median value of : (50,776 + 69,636) / 2  =  60,206 psi  = 
415 N/mm2

+=================+




C. ==== TENSILE STRENGTH OF ASTM A513 ====

Scouring the Web high and low, I was not able to find any sources that
published ASTM A513 specifications for free (paid sources pasted
below). However, I found an excellent Korean website (e-pipe) that
listed the minimum tensile strengths of all the grades available for
ASTM A513. Since I don't know what grade of ASTM A513 you are looking
to compare, here is the link for your reference :

+-------------------------------+

ASTM A513-88-ASME SA513 ELECTRIC RESISTANCE WELDED CARBON AND ALLOY
STEEL MECHANICAL TUBING
http://www.e-pipe.co.kr/eng/ASTM/A513.htm

This page publishes the minimum tensile strengths of all the grades
available for ASTM A513. Using 1010 and 1020 as the most common grades
(these appear most frequently in search results), we get a range of :

ASTM A513 Tensile Strength = 310 to 359 N/mm2 
... with a median value of (310 + 359) / 2 = 334.5 N/mm2

+=================+




D. ==== CONCLUSION ====

In conclusion, assuming the most common grades of ASTM A513, it would
appear that DIN 1630 / St 37.4 has an average higher Tensile Strength.

Using our assumptions, we are comparing the following median values :

ASTM A513 :
334.5 N/mm2

DIN 1630 / St 37.4
415 N/mm2


HOWEVER, specific comparison depends on what grade ASTM A513 you are
looking at.

+=================+




==== OTHER INFO ====

A513-00 Standard Specification for Electric-Resistance-Welded Carbon
and Alloy Steel Mechanical Tubing
(online purchase & download, $35)
http://www.astm.org/cgi-bin/SoftCart.exe/DATABASE.CART/PAGES/A513.htm?E+mystore

+-------------------------------+

SN Comparative Steel Standards Feature :
ASTM International Forges New Guide for Comparing Steel Standards :
Handbook and CD-ROM Simplify Searches for Material Equivalency
http://www.astm.org/SNEWS/JANUARY_2002/ds67a_jan02.html

"This month, ASTM International publishes The Handbook of Comparative
World Steel Standards: Second Edition (DS67A). Completely updated and
revised, the Handbook groups comparable steels based on their chemical
composition and mechanical properties according to a detailed set of
rules outlined in the first chapter."

"Foreign steel is often cheaper, more available, or might be
stipulated in contracts. Babcock and Wilcox uses local foreign
materials for much of the auxiliary equipment (structural steel,
sheet, and other non-pressure containing components) when they build a
boiler oversees."

" "A lot of these countries have excellent materials for the less
critical parts," Tanzosh says. "Where we're allowed to use foreign
materials, we will use them because of their economy and availability.
That's where we need to have references like your Handbook that
describe the material specifications of the different countries that
are available in different areas of the world for us to be able to
procure and use in construction of the boilers. "

+-------------------------------+

ISteelAsia Unit Converter
http://www.isteelasia.com/tools/tool538.jsp

+=================+



Google Search Terms :

"St 37.4" OR "DIN 1630" tensile
://www.google.com/search?q=%22St+37.4%22+OR+%22DIN+1630%22+tensile&hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off

ASTM A513 OR "A 513" tensile
://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=ASTM+A513+OR+%22A+513%22+tensile&btnG=Google+Search



I hope this answers your question, and provides further resources for
your reading. Please do not hesitate to request clarification if
needed. Thank you for using Google Answers.


Warmest regards,

kyrie26-ga

Request for Answer Clarification by bob365-ga on 29 Aug 2002 06:24 PDT
can you give me the standards for ST 37.4 / din 1630 or point me to a
site that gives all the required standards?
thanks, bob365

Clarification of Answer by kyrie26-ga on 29 Aug 2002 07:53 PDT
Hi bob365-ga,

Thank you for your clarification request. I have found a Web page that
publishes the DIN 1630 standard (in English!) :

DIN 1630-84 SEAMLESS CIRCULAR TUBES OF NON ALLOY STEELS WITH VERY HIGH
QUALITY REQUIREMENTS
http://www.e-pipe.co.kr/eng/DIN/1630.htm

I should have mentioned it earlier, this is the same Web page (e-pipe)
as the second one I used in part A to show you the 350.0 - 480.0 N/mm
tensile range. This page should cover what you are looking for.

In addition, if you would like to purchase these standards, feel free
to visit the following links :


==== Normas.com : Online ordering service for industry standards ====

+-------------------------------+ 

DIN Standards in English : Individual DIN Standards
http://www.normas.com/DIN/pages/Translations.html#Translations

"Currently, more than 7,000 DIN Standards are available in official
English translation prepared and edited by DIN-Sprachendienst (DIN
Translation Services) or by other bodies within or associated with
DIN. Together with the DIN Standards published in English (mainly in
the field of information technology) and the VG (Defence) and LN
(Aerospace) Standards published in English or German-English editions,
the total number of DIN Standards available in English is around
9,500."

" To order or inquire about price and availability, please contact
International Library Service at:
Email: din@normas.com 
Phone: (801) 374-6214
Fax: (801) 374-0634 "

+-------------------------------+ 

ASTM STANDARDS SOURCE COLLECTIONS
http://www.normas.com/ASTM/STDS/sections/SOURCE.html
"The ASTM standards on CD-ROM are available..."

+=============================+ 


Google Search Terms :

"St 37.4" OR "DIN 1630" specification OR specifications
://www.google.com/search?q=%22St+37.4%22+OR+%22DIN+1630%22+specification+OR+specifications&hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off


I hope that brings you closer to your answer! Do let me know if you
need further clarification and I'll be glad to help.


Regards,

kyrie26-ga

Request for Answer Clarification by bob365-ga on 29 Aug 2002 11:25 PDT
Hi Kyrie, thanks for the point.  can you point me to the standards in
english for ST 37.4?
thanks, bob365

Clarification of Answer by kyrie26-ga on 29 Aug 2002 12:02 PDT
Hello again bob365-ga,

My research seems to indicate that "St 37.4" is not really a standard,
but a grade of steel. Looking at the web pages I have found (some of
which were listed earlier), a DIN standard is usually accompanied by
several St grades. This Web page seems to confirm it too :

+--------------------------+

Seamless tubes for pipelines, structural purposes and shipbuilding
industry
http://www.hutabatory.com.pl/hb_s211_en.htm

"A. Specifications:
Tubes are manufactured in accordance with requirements of Polish or
foreign standards: DIN 1629, 1630, 17121, 17175, 10210-1,
DIN-EN10210-1, NFA 49-112, ASTM A53, A106, GOST 8731-87, BV, DNV, LRS,
GL, TV API5L, PRS Rules. We are also accepted for applying of HP
conformity mark for line and constructional tubes intended for
structures."

"B. Steel grades: 
St37.0, St44.0, St52.0, St37.4, St44.4, St52.4, RSt37-2, St37-3,
St44-2, St44-3, St45-8, St52-3, St35.8, TUE220A, TUE235A, A, B, C,
NVA, NVR1-1, NVR1-2, 320, 360, 410, 19Mn5, 15Mo3, 13CrMo910, 14MoV63,
S355JOH, S355J2H, P91."

+--------------------------+

This is also supported by the fact that a search through the paid
standards specification providers does not reveal any "St" as a
standard.

+--------------------------+

Here is another link that supports this :

Abek - Your partner in the waster and energy sectors
http://www.abek.de/abek2/water2.htm

+--------------------------+

...so St 37.4 is actually a "materials specification" or composition
specification.

+--------------------------+

Please refer to Table 29 on the following link for the specifics of
this composition :

Sinarsky Pipe Works (Products)
http://www.sinarsky.ru/eng/prod7.html

+--------------------------+

Again I would like to refer to our Korean e-pipe page for the same
table (scroll to the bottom on the page provided by the following
link) :

DIN1630-84 SEAMLESS CIRCULAR TUBES OF NON ALLOY STEELS WITH VERY HIGH
QUALITY REQUIREMENTS
http://www.e-pipe.co.kr/DIN/1630.htm

+--------------------------+

Google Search Terms :

ST37.4 OR "ST 37.4" specification OR specifications
://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q=ST37.4+OR+%22ST+37.4%22+specification+OR+specifications&btnG=Google+Search

ST37.4 OR "ST 37.4" composition
://www.google.com/search?q=ST37.4+OR+%22ST+37.4%22+composition&hl=en&lr=&ie=UTF-8&oe=UTF-8&safe=off


Hope we are getting closer! Let me know otherwise.


Have a great day,

kyrie26-ga
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