Ultra High Strength Steel
Ultra High Strength Steel
Ultra High Strength Steel
Ultra High Strength Steel

Ultra High Strength Steel

Since the 1990s, the world's steel companies have developed ultra-high strength hot rolled plates for cold forming through multi-component microalloying, controlled rolling and controlled cooling technologies, and have been applied in construction machinery, containers, automobiles and other fields.

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Product Introduction

Low alloy high strength plates are mostly ferritic-pearlescent type low alloy high strength steel. Its composition design is low carbon, slightly higher manganese and an appropriate amount of silicon elements, but also individually or compound to add niobium, vanadium, titanium and other microalloying elements, the use of solid solution strengthening, precipitation strengthening and grain refinement and other strengthening mechanisms to obtain the required strength and toughness. The main production process is: hot metal pre-desulfurization → bconverter compound blowing → ladle furnace refining → continuous casting → slab heating furnace → high pressure water descaling → hot continuous rolling → laminar cooling system → Coiler → hot rolled coil → flat machine → hot rolled steel plate or flat steel coil.

With the development of the Automobile industry, in order to improve the carrying capacity of automobiles, extend the service life of automobiles and the requirements of energy saving, material saving and safe driving, automobile lightweight (Ligntweight of Automobile) has become the trend of the development of automobiles in the world. Automotive lightweight, reducing the weight of structural parts is the main goal of the application of low alloy high strength board in the automotive industry. Expert research shows that every 91KG reduction in vehicle mass, the average oil per liter can travel 0.43KM more; For every 10 percent reduction in vehicle weight, at least 6 percent fuel savings can be achieved. This goal should be achieved by reducing the thickness of the plate and improving the strength of the steel plate. Since the 1990s, with the development of the automobile industry and the improvement of traffic conditions, reducing the quality of the automobile itself, improving the payload capacity, reducing production costs, reducing fuel consumption, and reducing exhaust pollution has become a trend in the development of automobiles. To this end, countries around the world have competed to develop low-alloy high-strength plates, and have been applied to automobile beams, longitudinal beams, side beams, columns, frames.

Structural Steel 960 Impact Properties

Material	Min impact energy, Charpy V 10x10 mm tests specimens, transverse test,
S960QL	40 J/ - 40 Degree C
S960QL1	27 J/ - 60 Degree C

Maximum Carbon equivalent CET(CEV)

Thickness	4.0-34.9	35.0-120.0
CET(CEV)	0.38(0.58)	0.41(0.67)

S960QL High Strength Steel Plate Chemical Composition

	%
Si	00.80
C	00.20
Mn	1.70
P	00.020
S	00.010
N	00.015
B	00.0050
Cr	1.50
Cu	00.50
Mo	00.70
Nb	00.06
Ni	2.0
Ti	00.05
V	00.12
Zr	00.15

Mechanical Properties of S960QL High Strength Structural Steel

Thickness of material (mm)	Yield strength Rp0.2(min MPa)	Tensile strength Rm(MPa)	Elongation A5(min %)
4.0 - 53.0 mm	960 MPa	980 - 1150 MPa	12%
53.1 - 120.0 mm	850 MPa	900 - 1100 MPa	10%