Hi Mr Malemela,
Under the North American context ASTM is the major governing society who does everything on standardization of all materials (ferrous, non ferrous or even non-metals). Any steel originating from North America (USA especially) will have an ASTM standards/specification assigned to it.
API specifications are typical to oil and gas applications, and in general this specification does not cover steel products applicable for Non-Oil and Gas applications.
EN specification is the effort of One Common European Specification. Steels and other non -ferrous materials previously having individual specifications such as BS, AFNOR, and DIN….. are all covered under one common specification known as Euro Normen (EN). You may get a British Steel a German steel both having same EN specification.
If the application of steel products are typically for boiler and pressure vessels then ASME Sec- IX (2007 onwards) have included quite a few EN and API specifications and many of which have been assigned P Nos also. You may see those specifications on page 108 & 109 of Sec-IX (2007).
Note one easy way to know the correct equivalence between ASTM/API/EN materials is to know the UNS No (Unified Numbering System). Any steel having the same UNS number but corresponding to one of these specifications, ASTM/API/EN would essentially be the same in chemistry and mechanical properties. However please note due to immense number of specifications involved all steels may not be co-related through UNS no.
For general details and further guidance you may refer this book:-
· ASTM, Worldwide equivalence of steels:- http://www.astm.org/BOOKSTORE/PUBS/1377.htm
I hope this would help you. Feel free to drop a line anytime.
Thanks
Pradip Goswami,P.Eng
Senior Engineer/Specialist(Welding-Metallurgy)
Engineering & Training Services Division
ONTARIO POWER GENERATION Inc.
PO Box-2000, RR-55(South)
Nanticoke, Ontario,N0A1L0
Tel:-(519) 587-2201, Ext 3107--in Nanticoke
(416) 231-4111, Ext 5925--in Kipling,Toronto
Fax: (519) 587-6814
-----Original Message-----
From: pgoswami@sympatico.ca [mailto:pgoswami@sympatico.ca]
Sent: Tuesday, February 02, 2010 7:18 AM
To: GOSWAMI Pradip -THERMAL
Subject: FW: [MW:4185] COMPARATIVE TABLE FOR STEEL GRADES AND DESIGNATION BY CODE OF SPECIFICATION
From: smalemela@spc.co.za
To: materials-welding@googlegroups.com
Subject: [MW:4185] COMPARATIVE TABLE FOR STEEL GRADES AND DESIGNATION BY CODE OF SPECIFICATION
Date: Tue, 2 Feb 2010 12:54:58 +0200
Hi All
I often get confused when people switch between API Steel specification and ASTM grades. Can somebody please help me with a link or information that shows comparisons between the various steel grades and their designations across the international standards currently in use? I am particularly interested in API, ASTM and EN designations and their equivalents across the mentioned codes of specification.
Thanks in advance
NS MALEMELA
Southern Pipeline Contractors
TEL:(011) 914-8519
FAX:(011) 914-4524
082 389 2592 Cell
smalemela@spc.co.za
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