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What is the upper limit of SM570 steel plate thickness

SM570 steel plate is HSLA - high strength low alloy steel under JIS G3106 standard. SM570 steel plate has the highest strength and toughness among JIS G3106 steel grades. Of course, SM570 steel plate strength varies with SM570 steel plate thickness. Generally, the larger the SM570 steel plate thickness, the lower the SM570 steel plate strength.

In table below, we can realize such change also. The second line is about SM570 steel plate thickness, and the bottom line is SM570 steel plate strength.

Generally, the upper limit of SM570 steel plate thickness is 100mm. However, after negotiation between the purchaser and supplier, the SM570 steel plate thickness can also reach to 150mm. For SM570 steel plate with thickness over 100mm, the SM570 steel plate properties need to be negotiated between the SM570 steel plate supplier and purchaser.