A small amount of Nb is sufficient to obtain excellent comprehensive properties of SA572 Grade 50 steel for platform pipe joints etc. Because at low Nb concentration, the yield strength of steel material increases faster and is proportional to the concentration, but when the Nb content is greater than 0.03%, the strengthening effect begins to decrease. Studies have shown that when the Nb content is greater than 0.06%, excess Nb will no longer strengthen the steel material.
BBN steel's SA572 Grade 50 steel for platform pipe joints product stock: 31*1640*6150, 34*1460*4550, 34*2420*7300, 26*2800*5300, 32.5*3050*7000, 32*1600*4000, 36*1300*4500, 35*1300*4100, 26*2990*6000, 37*1600*8600, 32*2650*5500, 33*2550*6000, 34*2120*6100, 36*1500*6000, 45*1300*4000, 32*3300*6000, 40*1590*8000, 33*1750*6000, 33*1750*6000, 50*1800*6000, 65*2000*6000.
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