SABS 1431 Grade 300wa Steel Plate

SABS 1431 Grade 300wa Steel Plate

300wa shipbuilding steel plate supplier in India

SABS 1431 Gr 300wa application is for weldable structural steels. It can be heat treated at 1513°C - 1321°C.

SABS 1431 Gr 300w has high strength, low weight, ductility, durability and resistance to corrosion. It is all know for offering great strength though it is light in weight.

Among the elements of SABS 1431 Grade 350wa. Carbon is hardening element. Silicon helps to strengthen the material strength. Manganese is the important austenite stabilizing elements which contribute to the formation of texture structure and increase the strength, firmness and wear resistance. Phosphorus in its element reduces the plasticity and toughness and appearing cold brittleness. Meanwhile, it can significantly increase the strength of it, and improve the atmospheric corrosion stability.

SABS 1431 pressure vessel & wear resistant steel plates stockist in Mumbai, view dimensions, sizes and price list

SABS 1431 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.

300wa Steel Plate making

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.

SABS 1431 Grade 350wa Plate and Sheet

Sheet are up to 4.5 mm  thick, and plate are 4.5 mm and thicker.  Different dimensional tolerances applicable to sheet and plate. Material 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.

300wa Plate Chemical Composition

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.

SABS 1431 Grade 300wa 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

Grade 350wa Plate 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.

SABS 1431 Gr 300wa 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)

300wa SABS 1431 Plate certification and tolerance

All plates are supplied with analysis and test certificates. Dimensional tolerances of plates are according to BS EN 10051:1992

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

Grade 350wa Plate Mechanical properties

Mechanical properties as specified in SABS 1431 - 1987

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

SABS 1431 Gr 300wa Equivalent

American (USA) Standards

 Europe (EN) Standards

 Japan Standards

 South Africa Standards

 Yield Stress

 Tensile Strength

 Lower Strength (for workability and weldability)
 ASTM A283 gr. C EN 10025 S235JR 
DIN 17100 RSt 37-2
BS 4360: gr. 40 A/B/C 
JIS G3101 SS 330  SABS 1431 gr. 240 W A/C  235 MPa min  340-470Mpa
Normal Strength (for general use)
ASTM A36 EN 10025 S275 JR 
DIN 17100 RSt 44-2
BS 4360: gr. 43 A/B/C
JIS G3101 SS400 SABS 1431 gr. 300 W A/C  275 MPa min  430-550 MPa
 Higher Strength Microalloyed Steel Plate
ASTM A572 gr. 50 EN 10025 S355JR 
DIN 17100 RRSt 52-2
BS 4360: gr. 50 A/B/C   
JIS G3101 SS490  SABS 1431 gr. 350 W A/C  355 MPa min  490-630 MPa
 Weathering Steel Plate (for improved corrosion resistance)
     

 Other Standards

   
     

    COR-TEN/ A

 345 MPa min  480 MPa min