Euro Steel Approximate Grade Equivalents


Stainless Steel Approximate Grade Equivalents

NOTE: The values given below are typical. Stainless steels within the same classification (e.g. Austenitic stainless steels) will have similar values, but even slight variations of chemical composition within the specification limits of the same steels will affect the actual value. Reported values are often slightly different, depending on the reference. Many of these properties are temperature dependent. The values given below should not be used as guaranteed or minimum values. Values are typical values and should not be used for design purposes.


Euro Steel Corrosion Guide


• NR = The material is not recommended • ND = No data is available
• R = Indicates that the material is resistant to the named chemical up to the temperature shown, subject to limitations indicated by the footnotes.

1 = Not if chlorides are present
2 = Limited data
3 = Depends on the acid
4 = Dry acid fumes, attack may occur if moisture builds up
5 = Anhydrous
6 = Depends on concentration
7 = May discolour with time
8 = In strong solutions only when inhibited
9 = Pitting possible in stagnant conditions
10 = Possibility of pitting
11 = May cause stress corrosion cracking
12 = When free of SO2
13 = May cause contamination of product
14 = Dilute hypochlorites can be used to sterilise some stainless steels
15 = General corrosion may become excessive
16 = 10%
17 = In the absence of impurities
18 = Dilute
19 = Some attack at high temperatures

* Corrosion information courtesy of Columbus Stainless Steel (PTY) LTD. Values are typical guidelines and should not be used for design purposes.

Exposure in chloride containing media can result in localised corrosion.
In order of increasing resistance to localised corrosion: 3CR12 < 430 < 304L < 316L < 2205

• Design vessels for complete drainage – avoid sharp corners and stagnant areas.
• Close crevices and lap joints by continuous welding.
• Remove solids in suspension. Prevent sedimentation. Ensure continuous agitation and
adequate flow rates.
• Use compressive non-absorbent gaskets or inert sealing compounds.
• Ensure non-impairment of passive surface. Repair / restore any affected areas



Euro Steel Abbreviations & Definitions

Abbreviations & Definitions

ANSI – American National Standard Institute
(most ANSI specifications has been replaced by ASME)
API – American Petroleum Institute
ASME – American Society of Mechanical Engineers
ASTM – American Society for Testing Materials
AWWA – American Water Works Association
BBE – Bevelled Both Ends
BLE – Bevelled Large End
BS – British Standards
BSP – British Standard Pipe Thread
CPLG – Coupling
DDQ – Deep Drawing Quality
DIA or ‘D’ – Diameter
DIN – Deutsches Institut fur Normung (German Standard)
DOM – Direct Off Mill
ECC – Eccentric
EFW – Electric Fusion Welded
EN – European Norms
FF – Flat Face
GR – Grade
ISO – International Standards Organization
JIS – Japanese Industrial Standard
LJ – Lapjoint
LR – Long Radius
LW – Lap Weld
MPT – Male Pipe Thread
MSS – Manufacturers Standardisation Society
of the valve and fittings industry
NPS – Nominal Pipe Size
NPT – National Pipe Thread Taper
NOM – Nominal
OD – Outside Diameter
OHSACT – Occupational Health and Safety Act
PBE – Plain Both Ends
PE – Plain Ends
PIPE – A tube used to convey water, gas, oil, etc

POE – Plain One End
PSE – Plain Small End (Swage Nipple)
RED – Reducer
RF – Raised Face
RTJ – Ring Type Joint
SABS – South African Bureau of Standards
SANS – South African National Standards
SCH – Schedule
SCRWD – Screwed
SF – Smooth Finish
SMLS – Seamless
SO – Slip On
SR – Short Radius
SS – Stainless Steel
SW – Socket Weld
TBE – Threaded Both Ends
TOE – Thread One End
TOL – Threadolet or Tolerence
TPI – Thread Party Inspection
TS – Tensile Strength
TSE – Threaded Small End
TUBE – A long, hollow cylinder for conveying
or holding liquids or gases.
USW – Ultrasonic Welding
UT – Ultrasonic Testing
UTS – Ultimate Tensile Strength
WN – Weld Neck or welding neck
WOG – Water Oil and Gas
WOL – Weldolet
WP – Wrought Product
WP-S – Wrought Product, Seamless (as part of the
description for wrought fittings. E.g. (WP304L S)
WPW – Wrought Product Welded
WPWX – Welded with X-Ray
(as part of the description for wrought fittings
E.g. 90 Degree Elbow WP304L WX)
XS – Extra Strong as per ASME B36.10m
XXS – Double Extra Strong as per ASME B36.10m