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Table 18 — Design strengths of Japanese (JIS) structural steels Design strength py (N/mm2), for thickness (mm) less than or equal to Grade 30 16 40 75 100 160 200 SM 490A, B 325 315 295 295 285 275 SM 490C 325 315 295 295 - - SM 490YA,YB 365 355 335 325 - - SM 520B, C 365 355 335 325 - - SM 570 460 450 430 420 - - SMA 490BW,BP 365 355 335 325 305 295 BC1: 2008 BC1: 2008 Design strength py (N/mm2), for thickness (mm) less than or equal to Grade 16 40 75 100 160 200 SMA 490CW, CP 365 355 335 325 - - SMA 570W 460 450 430 420 - - SN 400 B, C 235 235 215 215 - - SN 490 B, C 325 325 295 295 - - SSC 400 245 - - - - - Table 19 — Design strengths of Australian/New Zealand (AS/NZS) structural steels Design strength py (N/mm2), for thickness (mm) less than or equal to Grade 8 12 20 32 50 80 150 3678-250-L15 250 250 250 250 250 240 240 3678-300-L15 300 300 300 280 280 280 280 3678-350-L15 350 350 350 340 340 340 330 3678-400-L15 400 400 380 360 360 360 - 3678-450-L15 450 450 450 420 400 - - 3679-250 250 250 250 250 230 - - 3679-350 350 340 340 340 330 - - 3679-400 400 400 380 380 - - - 1163-C250 250 250 - - - - - 1163-C275 275 275 - - - - - 1163-C300 300 300 - - - - - 1163-C350 350 350 - - - - - 1163-C400 400 400 - - - - - 1163-C450 450 450 - - - - - 1397-G250 250 - - - - - - 1397-G300 300 - - - - - - 1397-G350 350 - - - - - - 1397-G450 450 - - - - - - 1397-G500 500 - - - - - - 1397-G550 550 - - - - - - 1595-C220 210 - - - - - - 1595-C260 250 - - - - - - 1595-C350 350 - - - - - - 31 BC1: 2008 Table 20 — Design strengths of Chinese (GB) structural steels Design strength py (N/mm2), for thickness (mm) less than or equal to Grade 16 35 50 100 150 Q235 235 225 215 215 195 Q275 275 265 255 245 225 Q295 295 275 255 235 - Q345a 345 325 295 275 - Q345b 325 315 305 - - Q355c 355 345 335 325 - Q390 390 370 350 330 - Q420 420 400 380 360 - Q460 460 440 420 400 - a) Not applicable to Q345 for seamless hollow sections manufactured to GB/T 8162.

1 Class 2 structural steel This section covers the design strength of Class 2 steel plates, hot rolled sections, hollow sections and steel for cold forming. The basic design strength pyo corresponding to the thickness not greater than 16 mm shall be computed using the following equation. Basic design strength: The design strengths corresponding to different thickness are given in Table 52. 80pyo a) For rolled sections, used the specified thickness of the thickest element of the cross-section. 2 Class 2 non-preloaded bolted connections This section covers the design strengths of Class 2 non-preloaded bolts and the recommended combinations of matching components in non-preloaded bolting assemblies.

In both cases, the quantity of steel materials actually supplied to the purchaser shall be clearly indicated. 3 Classification procedure The complete classification procedure of alternative steel materials shall follow the flow represented by the overall framework shown in Figure 1. 3. 1 Class 1 alternative steel materials Class 1 alternative steel materials are certified steel materials manufactured with approved quality assurance. NOTE Only materials in the list of certified materials can be qualified as Class 1 alternative steel materials, depending on the quality assurance provided by the manufacturers.

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