5-12 API STANDARD 650

Table 5-2a(SI) Permissible Plate Materials and Allowable Stresses

PlateSpecification Grade

Plate Thickness tmm

MinimumYield Strength

Mpa

MinimumTensile Strength

Mpa

ProductDesign Stress Sd

Mpa

HydrostaticTest Stress St

MpaASTM Specifications

A 283M C 205 380 137 154A 285M C 205 380 137 154A 131M A, B, CS 235 400 157 171A 36M 250 400 160 171A 131M EH 36 360 490a 196 210A 573M 400 220 400 147 165A 573M 450 240 450 160 180A 573M 485 290 485a 193 208A 516M 380 205 380 137 154A 516M 415 220 415 147 165A 516M 450 240 450 160 180A 516M 485 260 485 173 195A 662M B 275 450 180 193A 662M C 295 485a 194 208A 537M 1 t 65

65 < t 100345310

485a450b

194180

208193

A 537M 2 t 6565 < t 100

415380

550a515b

220206

236221

A 633M C, D t 6565 < t 100

345315

485a450b

194180

208193

A 678M A 345 485a 194 208A 678M B 415 550a 220 236A 737M B 345 485a 194 208A 841M Class 1 345 485a 194 208A 841M Class 2 415 550a 220 236

CSA SpecificationsG40.21M 260W 260 410 164 176G40.21M 260 WT 261 411 165 177G40.21M 300W 300 450 180 193G40.21M 300WT 301 451 181 194G40.21M 350W 350 450 180 193G40.21M 350WT t 65

65 < t 100350320

480a480a

192192

206206

National Standards235 235 365 137 154250 250 400 157 171275 275 430 167 184

ISO 630E 275 C, D t 16

16 < t 40275265

410410

164164

176176

E 355 C, D t 1616 < t 4040 < t 50

355345335

490a490a490a

196196196

210210210

aBy agreement between the Purchaser and the Manufacturer, the tensile strength of ASTM A 537M, Class 2, A 678M, Grade B, and A841M, Class 2 materials may be increased to 585 MPa minimum and 690 MPa maximum. The tensile strength of the other listed materialsmay be increased to 515 MPa minimum and 620 MPa maximum. When this is done, the allowable stresses shall be determined as stated in5.6.2.1 and 5.6.2.2.bBy agreement between the Purchaser and the Manufacturer, the tensile strength of ASTM A 537M, Class 2 materials may be increased to550 MPa minimum and 690 MPa maximum. The tensile strength of the other listed materials may be increased to 485 MPa minimum and620 MPa maximum. When this is done, the allowable stresses shall be determined as stated in 5.6.2.1 and 5.6.2.2.

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