Hebei Haihao group can offer the shipbuilding steel plate with ABS and BV certificate .

Higher-strength steel grades certified for use in shipbuilding capacities.

Available in four ordinary-strength grades: A, B, D and E.

Used in the building of structural parts of ships, barges and marine equipment.

Certified by the American Bureau of Shipbuilding (ABS) and  Bureau Veritas (BV).

AH36 material is a kind of normal temperature steel, and DH36 steel is a kind of low temperature steel. Shipping steel plate, manufactured in regard of classification society, is widely used in building ship structure.

It is a tad complex since it relates, as noted above to the thickness and temperature of operation. In addition, where the steel is located on the vessel. Such that is the location Class I or II or III, and is it primary or secondary structure, and is the location within 0.4L of amidships or outside 0.4L of amidships. And finally within these ‘zones’ is it side plate, sheerstrake and stringers, or exposed deck etc.

Once you have identified all this, you look at a matrix of Classes versus exposed temperature versus thickness.

For example a Class I with a average external air temperature of -15 to -19c with a thickness less 10mm, if using Higher Tensile (AH or DH), then AH is fine up to 10mm thick. But if the thickness is 25mm or greater than it must DH grade.

If this is now Class III, the cross over from AH to DH occurs above 10mm. Thus where the steel is located and what class is the driver. Which relates to the way the steel is manufactured, i.e. quality control.