Properties
General
| Property | Value | Comment | |
|---|---|---|---|
Carbon equivalent (CET) | 0.46 [-] Show Supplier Material materials with Carbon equivalent (CET) of 0.46 [-] | for thickness 6-30 mm | |
Carbon equivalent (CEV) | 0.68 [-] Show Supplier Material materials with Carbon equivalent (CEV) of 0.68 [-] | for thickness 6-30 mm | |
Carbon equivalent note | CEV = C+Mn/6+ (Ni+Cu)/15+ (Cr+Mo+V)/5 and CET = C+(Mn+Mo)/10+Ni/40 +(Cr+Cu)/20 | ||
Dimension
| Property | Value |
|---|---|
Width | 1500 - 3100 mm Show Supplier Material materials with Width of 1500 - 3100 mm |
Mechanical
| Property | Value | Testing Standard | Comment |
|---|---|---|---|
Elongation | 7 % Show Supplier Material materials with Elongation of 7 % | A5 | |
Hardness, HBW | 520 - 580 [-] Show Supplier Material materials with Hardness, HBW of 520 - 580 [-] | EN ISO 6506-1 | 1-2 mm below the plate surface once per heat and 40 tonnes |
Tensile strength | 1750 MPa Show Supplier Material materials with Tensile strength of 1750 MPa | Transverse | |
Yield strength | 1575 MPa Show Supplier Material materials with Yield strength of 1575 MPa |
Chemical properties
| Property | Value | Comment |
|---|---|---|
Boron | 0.005 % Show Supplier Material materials with Boron of 0.005 % | max. |
Carbon | 0.35 % Show Supplier Material materials with Carbon of 0.35 % | max. |
Chromium | 1.1 % Show Supplier Material materials with Chromium of 1.1 % | max. |
Manganese | 1.6 % Show Supplier Material materials with Manganese of 1.6 % | max. |
Molybdenum | 0.5 % Show Supplier Material materials with Molybdenum of 0.5 % | max. |
Nickel | 1 % Show Supplier Material materials with Nickel of 1 % | max. |
Phosphorus | 0.025 % Show Supplier Material materials with Phosphorus of 0.025 % | max. |
Silicon | 0.8 % Show Supplier Material materials with Silicon of 0.8 % | max. |
Sulfur | 0.01 % Show Supplier Material materials with Sulfur of 0.01 % | max. |
Technological properties
| Property | ||
|---|---|---|
| Application areas | Quard 550 is mainly recommended for the following applications: | |
| Chemical composition | The steel is grain refined. | |
| Delivery condtion | Our Quard plates are supplied as standard in the shotblasted and primed condition. In order to maintain a good weldability and laser cutting performance, a low zinc silicate primer is applied. Plates can also be delivered unpainted. | |
| Heat Treatment | Quard 550 receives its properties by quenching and when applicable by subsequent tempering. The properties of the delivery condition can not be retained after exposure at service or preheating temperatures above 250 °C. Quard 550 is not intended for any further heat treatment. | |
| Machining | Quard 550 offers good machinability with HSS and HSS-Co alloyed drills. The feed rate and cutting speed have to be adjusted to the high hardness of the material. Face milling, counter boring and countersinking are best performed using tools with replaceable cemented carbide inserts. | |
| Other | Quard 550 is delivered with a unique combination of excellent flatness, tight thickness tolerances and superior surface finish. | |
| Testings | Ultrasonic testing (UT), is applied to secure the plate from discontinuities like inclusions, cracks and porosity. In thickness from 8 mm and up, all plates are UT tested and controlled against class S2, E2, according to EN 10160. | |
| Thermal cutting and welding | Plasma and flame cutting can be performed without the need for preheating in thicknesses up to 20 mm, provided the ambient temperature is above 0 °C. Subsequent to cutting, let the cut parts slowly cool down to room temperature. A slow cooling rate will reduce the risk of cut edge cracking (never accelerate the cooling of the parts). | |
| Welding | Quard 550 can be welded using any of the conventional welding methods, both as manual or automatic. Welding of Quard 550 is recommended to be performed at ambient temperature not lower than +5°C. Subsequent to welding, let the welded parts slowly cool down to room temperature (never accelerate the cooling process of the weld). If welding using a heat input of 1.7 kJ/mm, preheating is not required in single plate thickness up to 10 mm. The interpass temperature used should not exceed 225 °C. Soft weld consumables, giving low hydrogen weld deposits (<= 5 ml/100g), are recommended. The consumable strength should be as soft as the design and wear mode allows. In general, the welding recommendation of Quard 550 should be in the accordance to EN-1011. | |