450HBW Structural Steel Plate Low Alloy Steel High Hardness Full Hard
|Place of Origin:||China|
|Certification:||ISO9001:2015, ABS, BV, CCS, DNV GL, NKK|
Payment & Shipping Terms:
|Minimum Order Quantity:||5 metric tons|
|Packaging Details:||In bundles, standard seaworthy packing for export|
|Delivery Time:||15 days|
|Payment Terms:||L/C, T/T|
|Supply Ability:||3000 metric tons per month|
|Material:||Low Alloy Steel||Process:||Thermomechanically Rolled|
|Shape:||Flat Plate||Surface Treatment:||Plain And Smooth|
|Length:||Up To 12000mm||Condition:||Stress Relieved|
|Application:||Structure||Feature:||Atmospheric Corrosion Resistant|
structural steel sheet,
hr steel plate
S460ML FINE GRAINED STRUCTURAL STEEL is a thermomechanically rolled, fine grained structural steel with minimum yield strength of 460 MPa in its delivery condition ex works (referring to the lowest thickness range). It fulfils the requirements of EN 10025-4.
Due to its chemical composition, this material has a low carbon equivalent and hence excellent weldability. The steel is preferentially used by the customers in constructional steelwork, hydraulic steelwork and mechanical engineering, where exacting demands are placed on weldability despite the application of higher strength steels.
Designation and range of application
S460ML FINE GRAIN STRUCTURAL STEEL can be delivered as follows:
· Low-temperature quality with minimum impact values at -50 °C:
Material No. 1.8838 - S460ML in accordance with EN 10025-4.
S460ML FINE GRAINE STRUCTURAL STEEL can be delivered in thickness from 8 to 150 mm (EN 10025-4 defines the properties only up to a thickness of 120 mm).
For the ladle analysis the following limiting values are applicable in %:
Mechanical properties in the delivery condition
Tensile test at ambient temperature – transverse test specimens
Minimum yield strength
|t ≤ 16||460||540 – 720||17|
|16 < t ≤ 40||440|
|40 < t ≤ 63||430||530 – 710|
|63 < t ≤ 80||410||510 – 690|
|80 < t ≤ 100||400||500 – 680|
|100 < t ≤ 120||385||490 - 660|
Impact test on Charpy-V-specimens
|Material||Specimen direction||Impact energy KV2 [J] at test temperature of|
|0 °C||-10 °C||-20 °C||-30 °C||-40 °C||-50 °C|
The specified minimum value is the average of 3 tests. One individual value may be below the minimum average value specified, provided that it is not less than 70 % of that value. Undersize specimens are admitted for plate thickness ≤ 12 mm, the minimum specimen width is 5 mm. The minimum impact energy will be decreased proportionally.
1) Yield strength of 460 MPa, as well as a tensile strength of 540 MPa independent of plate thickness. In these cases, the following max. CEV values apply for t > 40 mm:
40 mm < t ≤ 63 mm: CEV ≤ 0.43 %
63 mm < t ≤ 150 mm: CEV ≤ 0.44 %
2) The impact properties and the tensile properties shall be verified for each mother plate.
Tensile test and impact tests are carried out once per heat, 40 t and thickness range as specified for the yield strength according to table 5 of EN 10025-4. Tests on every mother plate are possible on request (see option 2). The test pieces are taken and prepared according to part 1 and 4 of EN 10025.
Identification of plates
Unless otherwise agreed, the marking is carried out via steel stamps with at least the following information:
· steel grade (460ML)
· heat number
· number of mother plate and individual plate
· the manufacturer’s symbol
· inspection representative’s sign
The entire processing and application techniques are of fundamental importance to the reliability of the parts and assemblies made from this steel. The user should ensure that his design, construction and processing methods are aligned with the material, correspond to the state-of-the-art that the fabricator has to comply with and are suitable for the intended use. The customer is responsible for the selection of the material. The 460 a product brand of recommendations in accordance with EN 1011 and SEW 088 should be observed.
With regard to its high toughness, S460ML FINE GRAINE STRUCTURAL STEEL can generally be well cold formed, i.e. at temperatures below 580 °C. Cold forming is always related to a hardening of the steel and to a decrease in toughness. This change in the mechanical properties can in general be partially recovered through a subsequent stress relief heat treatment. Flame cut or sheared edges in the bending area should be ground before cold forming. For larger cold forming degrees we recommend consulting us prior to ordering.
Hot forming, i.e. forming at temperatures above 580 °C, leads to changes in the original material condition. It is impossible to re-establish the same material properties that had been achieved during the original manufacture through a further treatment. Therefore hot forming is not permitted.
Flame cutting and welding
S460ML FINE GRAINE STRUCTURAL STEEL can be flame cut in all thickness ranges without preheating due to its low hardenability. Plasma and laser cutting can also be carried out without preheating for typical thickness.
S460ML FINE GRAINE STRUCTURAL STEEL has an excellent weldability if the general technical rules are observed (EN 1011 has to be applied analogously). The risk of cold cracking is low. The choice of the appropriate preheating temperature depends on the construction, plate thickness, welding heat input, chosen welding process, welding filler materials and base materials (basic quality B and low temperature quality T). From experience, an appropriate choice of these parameters allows omitting the preheating, even for high plate thicknesses (> 50 mm). To avoid hydrogen induced cold cracking, only filler materials, which add very little hydrogen to the base metal, may be used (up to 5 ml/100 g DM according to ISO 6390).
The low content of carbon and other alloy elements leads to favourable toughness properties in the heat affected zone, even with high heat inputs. Depending on the chosen welding process, welding filler material as well as toughness requirements in the heat affected zone, it permits cooling temperatures above the limiting values of 25 s as stated in EN 1011-2 and SEW 088.
Welded joints of S460ML FINE GRAINE STRUCTURAL STEEL are usually used in welded condition. If a stress relief heat treatment is necessary, it is carried out in the temperature range between 530 and 580 °C with cooling in air. The holding time should not exceed 4 hours (even if multiple operations are carried out). For particular heat treatment requirements we recommend consulting us prior to ordering.
General technical delivery requirements
Unless otherwise agreed, the general technical delivery requirements in accordance with EN 10021 apply.
Unless otherwise agreed, tolerances are in accordance with 10029, with class A for the thickness.
Unless otherwise agreed, the specifications will be in accordance with EN 10163, class A2.
Unless otherwise agreed, S460ML FINE GRAINE STRUCTURAL STEEL meets the requirements of class S1E1 in accordance with EN 10160.
If special requirements, which are not covered in this material data sheet, are to be met by the steel due to its intended use or processing, these requirements are to be agreed before placing the order.