Material reference
SABS / SANS 1431 STEEL MATERIAL SPECIFICATIONS
Standard material requirement tables for forged steel flange purchasing, inspection documents and material review.
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SABS / SANS 1431 steel material reference
| TABLE 1 - Chemical composition % (ladle analysis) as specified in SABS 1431, 1987 | ||||||||||||||
| 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 у 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 |
SABS / SANS 1431 steel material reference
| TABLE 2 - Chemical composition | |||||||||
| Chemical composition | |||||||||
| Grade | C (1) | Si | Mn (2) | P (max) |
S (3) (max) |
Al | Nb | V | N |
| 240WA | 0.12 | 0.25 (4) | 1.0 | 0.020 | 0.030 | 0.035 | - | - | - |
| 240WC | 0.12 | 0.25 (4) | 1.0 | 0.020 | 0.030 | 0.035 | - | - | - |
| 240WDD | 0.12 | 0.25 | 1.0 | 0.020 | 0.030 | 0.035 | - | - | - |
| 300WA | 0.18 | 0.35 (4) | 1.35 | 0.020 | 0.030 | 0.035 | - | - | - |
| 300WC | 0.18 | 0.35 (4) | 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 | - | - |
SABS / SANS 1431 steel material reference
| 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 |
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