Z15 means for Q345B-Z15 steel

Q345B-Z15: The Z-direction steel plate produced in China is marked by adding the Z-direction steel plate grade marks Z15, Z25, Z35 after the Q345B steel grade, and the number after the Z is an index (%) of the section shrinkage.
Z-direction steel is a common name for performance steel plates in the thickness direction. For thicker steel plates, there are special provisions for the mechanical properties in the thickness direction. Specific requirements can be found in the national standard GB / T5313-1985.
In the steel structure using welding connection, when the thickness of the steel plate is not less than 15 mm and it is subjected to the tensile force in the thickness direction of the plate, in order to avoid lamellar tearing during welding, a steel that resists lamellar tearing (usually referred to as "Z" To steel "). There is a problem of lamellar tearing in thick plates, so the Z-direction performance test is required.
This Q345B-Z15 steel plate is a steel that has been specially smelted and treated on the basis of a certain level of structural steel (called the parent steel). Its sulfur content is less than 1/5 of that of general steels, and its section shrinkage is more than 15%. . The stress performance (mainly ductility) of the steel plate in the thickness direction is called Z-direction performance. The Z-direction performance of a steel plate can be obtained by conducting a tensile test on a sample, and is generally measured by the reduction in area.

Q345B-Z15 Steel Plates in Stock

Product	Material	Size (mm)	Pieces	Weight (tons)	Warehouse
Hot rolled plates	Q345BZ15	32*1860*12500	1	5.84	Shanghai
Hot rolled plates	Q345BZ15	44*2500*9480	1	8.186	Shanghai
Hot rolled plates	Q345BZ15	45*2400*12000	1	10.174	Shanghai
Hot rolled plates	Q345BZ15	44*2500*11200	1	9.671	Shanghai
Hot rolled plates	Q345BZ15	40*1580*10900	1	5.408	Shanghai
Hot rolled plates	Q345BZ15	45*2420*8320	1	7.112	Shanghai
Hot rolled plates	Q345BZ15	45*2200*10720	1	8.331	Shanghai
Hot rolled plates	Q345BZ15	40*1950*8140	1	4.984	Shanghai
Hot rolled plates	Q345BZ15	40*1850*8030	1	4.665	Shanghai
Hot rolled plates	Q345BZ15	45*2170*6700	1	5.136	Shanghai
Hot rolled plates	Q345BZ15	48*1830*8030	1	5.537	Shanghai
Hot rolled plates	Q345BZ15	40*2020*8000	1	5.074	Shanghai
Hot rolled plates	Q345BZ15	40*1970*8600	1	5.32	Shanghai
Hot rolled plates	Q345BZ15	40*1580*10640	1	5.279	Shanghai
Hot rolled plates	Q345BZ15	40*1860*7010	1	4.094	Shanghai
Hot rolled plates	Q345BZ15	40*2220*12000	1	8.365	Shanghai
Hot rolled plates	Q345BZ15	40*2240*10300	1	7.245	Shanghai
Hot rolled plates	Q345BZ15	40*2380*12000	1	8.968	Shanghai
Hot rolled plates	Q345BZ15	50*2200*11700	1	10.103	Shanghai
Hot rolled plates	Q345BZ15	50*2200*11500	1	9.93	Shanghai
Hot rolled plates	Q345BZ15	50*2200*11400	1	9.844	Shanghai

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