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SABS 1431:1987 Steels 

SABS 1431:1987 SOUTH AFRICAN BUREAU OF STANDARDS STRUCTURAL STEELS

STRUCTURAL STEELS
SABS 1431 Technical Data

APPLICATION
These ranges of steel grades are intended for structural work where no significant forming or bending has to be done.The steel grade selected should be in accordance with its strength requirements as indicated in Table 3. 

STEEL GRADES
The following steel grades to SABS 1431:1987 are produced.

-    Grade 240 WA        240 WC        240 WDD*
-    Grade 300 WA        300 WC        300 WDD*
-    Grade 350 WA        350 WC        350 WDD*
* Available only as plate mill products.

As can be seen from Table 3, the mechanical strength properties are the same throughout a grade range but the impact test requirements differ according to the prescribed test temperatures as indicated by the suffix per grade designation.  An average impact energy value of 27 J must be achieved on full size specimens in the longitudinal direction in all applicable cases.

STEELMAKING
Steel for all grades to SABS 1431 is normally made as silicon killed steel and is also aluminium treated as standard practice to ensure a fine grain structure. The supply conditions pertaining to each steel grade are shown in Table 1.

PLATE AND SHEET
Sheet applies for products less than 4.5 mm  thick, whereas plate refers to products of 4.5 mm and thicker.  Different dimensional tolerances apply to sheet and plate.

Products up to and including 13 mm thick and up to and including 1850 mm wide (when side trimmed) are normally produced on a hot strip mill.

CHEMICAL COMPOSITION
Table 1 gives the values as specified in Table 2 of SABS 1431, 1987 (as amended).  The limits are set very wide offering the steelmaker maximum scope to apply his manufacturing techniques to obtain the specified mechanical properties in the final products.

When agreed at the time of ordering, plates of SABS 1431 steel grades can be supplied to the following maximum carbon equivalent (CE) values:

240WA,    WC & WDD    =    0.38%
300WA,    WC & WDD    =    0.45%
350WA,    WC & WDD    =    0.43%

TABLE 1 - Chemical composition % (ladle analysis) as specified in SABS 1431, 1987 
- Table 2 (as amended)
 

Maximum chemical composition1)
Grade C Mn Si P S Nb V Nb + V Al Cu1) Ni2) Cr2) Mo2) Normal supply conditions
240WA 0.22 1.60 0.50 0.040 0.050 0.01 0.03 0.04 0.10 0.35 0.30 0.30 0.10 As rolled
240WC 0.22 1.60 0.50 0.040 0.050 0.01 0.03 0.04 0.10 0.35 0.30 0.30 0.10 As rolled
240WDD 0.22 1.60 0.50 0.040 0.040 0.10 0.10 0.10 0.10 0.35 0.30 0.30 0.10 Normalised
300WA 0.22 1.60 0.50 0.040 0.050 0.03 0.03 0.04 0.10 0.35 0.30 0.30 0.10 As rolled
300WC 0.22 1.60 0.50 0.040 0.050 0.03 0.03 0.04 0.10 0.35 0.30 0.30 0.10 As rolled
300WDD 0.22 1.60 0.50 0.040 0.040 0.10 0.10 0.10 0.10 0.35 0.30 0.30 0.10 Normalised
350WA 0.22 1.60 0.50 0.040 0.040 0.10 0.10 0.10 0.10 0.35 0.30 0.30 0.10 As rolled
350WC 0.22 1.60 0.50 0.040 0.040 0.10 0.10 0.10 0.10 0.35 0.30 0.30 0.10 As rolled < 16 mm thick  
Normalised3) 
> 16mm
350WDD 0.22 1.60 0.50 0.040 0.040 0.10 0.10 0.10 0.10 0.35 0.30 0.30 0.10 Normalised

 
  1. Plates may be ordered with 0.20 / 0.35% copper for improved atmospheric corrosion resistance.
  2. Trace elements only.
  3. Can be supplied controlled rolled.
     

TABLE 2    -    Typical chemical composition 

Chemical composition
Grade C1) Si Mn2)
(max)
S3) 
(max)
Al Nb V N
240WA 0.12 0.254) 1.0 0.020 0.030 0.035 - - -
240WC 0.12 0.254) 1.0 0.020 0.030 0.035 - - -
240WDD 0.12 0.25 1.0 0.020 0.030 0.035 - - -
300WA 0.18 0.354) 1.35 0.020 0.030 0.035 - - -
300WC 0.18 0.354) 1.35 0.020 0.030 0.035 - - -
300WDD 0.18 0.35 1.35 0.020 0.030 0.035 - - -
350WA 0.15 0.35 1.25 0.020 0.030 0.035 0.028 - -
350WC 0.15 0.35 1.25 0.020 0.030 0.035 0.028 - -
350WDD 0.15 0.35 1.25 0.020 0.030 0.035 0.028 - -
  1. C usually is 0.02% lower on all hot strip mill products.

  2. Mn Usually is 0.30% lower on all hot strip mill products.

  3. For applications where toughness or through thickness strength is important, the plates may be ordered as per appendix A of  SABS 1431 to the following stricter sulphur contents : - Clause 0.11:S = 0.025% max - Clause 0.12:S = 0.012% max - Clause   0.13:S = 0.005% max

  4. Substantially lower Si contents may be used.

WELDABILITY
The SABS 1431 range of structural steel grades is readily weldable by means of the usual metal-arc processes.  When welding thick plates, reference should be made to BS 5135:1984 "Specification for arc welding of carbon manganese steels"  Carbon equivalent (CE) values should be calculated from the values of the chemical composition indicated on the test certificates for the plates concerned.  The formula to be used is:

CE = C + Mn + Cu + Ni + Mo + V + Cr
                   6            5                  15

 

ULTRASONIC TESTING
Plates may be ordered ultrasonically tested to any grade of BS 5996, as outlined in SABS 1431 Appendix B-2:014 (16 - 80mm)
 
 
BEND TEST
If agreed at the time of ordering, the material may be subjected to a bend test as detailed in SABS 1431 paragraph 6.5.5.

CERTIFICATION
All plates are supplied with analysis and test certificates.

TOLERANCES
Plate are supplied with dimensional tolerances according to BS EN 10051:1992


TABLE 3 - Mechanical properties as specified in SABS 1431 - 1987:  Table 5 

Grade Tensile 
strength 
(MPa)
Min yield strength (MPa) for thickness t (mm) Elongation % (min) on gauge length of Charpy V-notch impact test
3<t<16 16<t<40 40<t<63 63<t<80 50 mm 200 mm 5.65 So Avrage 
impact 
resistance J (min)
Test 
Tempe- 
rature 
(oC)
Thickness 
(max) 
(mm)
240WA 380/510 240 240 230 220 28 20 22 - - -
240WC 380/510 240 240 230 220 28 20 22 27 0 80
240WDD 380/510 240 240 230 220 28 20 22 27 -30 80
300WA 450/620 300 300 290 280 24 20 22 - - -
300WC 450/620 300 300 290 280 24 20 22 27 0 63
300WDD 450/620 300 300 290 280 24 20 22 27 -30 63
350WA 480/650 350 350 340 325 22 18 20 - - -
350WC 480/650 350 350 340 325 22 18 20 27 0 80
350WDD 480/650 350 350 340 325 22 18 20 27 -30 80


We mainly stock the Plates of following make : 

Azovstal Iron & Steel - Ukraine
Alchevsk Iron & Steel - Ukraine
Ilyich Iron & Steel - Ukraine 
ArcelorMittal Steel - Romania
ArcelorMittal Steel - South Africa
Macsteel - South Africa
Thainox Steel - Taiwan
Iscor - South Africa
Salzgitter Mannesmann - Germany
ThyssenKrupp Steel - Germany
ThyssenKrupp Stahl - Germany
Dillinger Hutte - Germany
Rautaruukki - Finland
Voestalphine Grobblech - Austria
Corus - U.K
Posco - Korea
InduSteel - France
InduSteel - Belgium
SSAB - Sweden
Kobe Steel - Japan
JFE Steel - Japan
Japan Steel - Japan 
Nippon Steel - Japan
Severstal - Russia
SAIL - India
Jindal Steel - India
TATA Steel - India


Inspection & Approval Certificates : EN10204 3.1 / DIN 50049 3.1 / ISO 10474 3.1 Mill Test Certificate, NACE MR-0175 / ISO 15156, NACE MR-01-03 / NACE MR-01-75 / ISO 15156, CE Marked, European Pressure Equipment Directive PED-97/23/EC, AD-2000-W0, ASME Boiler & Pressure Vessel Code Sec.II Part A Ed. 2008, with 3.2 certificate duly Certified & Approved by LRS (Lloyd's Register), GL (Germanischer Lloyd), BV (Bureau Veritas), DNV (Det Norske Veritas), ABS (American Bureau of Shipping), SGS, TUV, RINA, IRS (Indian Register of Shipping), Class NK (Nippon Kaiji Kyokai), KR (Korean Register of Shipping), NORSOK Approved Standard M-630, M-650 Rev.3


Regards,


CONTACT PERSON :

 


MUKESH SHAH
Director 
Mobile No. 0091 - 9820292499 
Email - 
marketing@rolexmetals.com


ROLEX METAL DISTRIBUTORS 
( A METAL & STEEL Company ) 
57-A, KHATARGALLI, 
THAKURDWAR, 
MUMBAI - 400002, INDIA. 
TEL.No. 0091-22-23858802 
TEL.No. 0091-22-23823963 
FAX No. 0091-22-23898724 
Email - 
marketing@rolexmetals.com 
Website – 
www.rolexmetals.com

 
 

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