Steel Grade

From the following table, the design values of tensile, compressive and bending strength f and shear strength V_f are obtained respectively:

Table 1. Design value of steel strength (N/mm²)
Steel Grade		Thickness or diameter (mm)	Design Value of Strength			Yield strength f_y	Tensile strength f_u
Steel Grade		Thickness or diameter (mm)	Tension, compression,bending f	Shear f_v	End bearing (planed and closely fitted) f_ce	Yield strength f_y	Tensile strength f_u
Carbon structural steel	Q235	≤16	215	125	320	235	370
		>16~40	205	120		225
		>40~100	200	115		215
Low alloy high strength structural steel	Q345	≤16	305	175	400	345	470
		>16~40	295	170		335
		>40~63	290	165		325
		>63~80	280	160		315
		>80~100	270	155		305
	Q390	≤16	345	200	415	390	490
		>16~40	330	190		370
		>40~63	310	180		350
		>63~100	295	170		330
	Q420	≤16	375	215	440	420	520
		>16~40	355	205		400
		>40~63	320	185		380
		>63~100	305	175		360
	Q460	≤16	410	235	470	460	550
		>16~40	390	225		440
		>40~63	355	205		420
		>63~100	340	195		400

In each inspection clause in the specification, the value of material strength used is extracted from the data specified here.

You can define a certain steel type manually, as long as the corresponding strength index can be specified. If you do not define and select the steel type, the program default value is set to Q235 steel.