 |
AJ Marshall - Unit 89 Marston Moor Business Park,
Rudgate, Tockwith, York YO26 7QF. UK Sales Office - Tel: +44 (0)1423 359111 Sales Office - Fax: +44 (0)1423 359222 |
Email - sales@ajmarshall.com
|
OPTIM 700MC - High Strength Steel |
Technical Data: -
 Data Sheet (45kb) |
Scope
Optim™ 700 MC's extra high strength steel grade offers excellent bendability, weldability and cutting properties.
Lightened structures mean increased payloads for machines and equipment, reduced fuel consumption,
environmentally sound construction and sustainable development. Surface quality and dimensional and
geometrical accuracy are guaranteed.
Optim 700 MC is a thermomechanically rolled (M), cold formable (C) steel which exceeds EN standards requirements (EN 10149-2).
Application
Frame structures of mobile vehicles, surface structures of commercial vehicles, frames and booms of forestry vehicles, crane arms and other lifting equipment, load handling equipment and masts.
Tolerances
Tolerances on dimensions and shapes:
· The dimension and shape tolerances conform with, and in part exceed, EN 10051 requirements.
· Guaranteed flatness for cut lengths is 3mm/m.
· Optim 700 MC cut lengths are delivered with the Dead Flat guarantee.
Materials Testing
Materials testing and sampling are carried out in compliance with EN 10149-1
Mechanical Properties of High Strength Steel
Plate Thickness mm |
Yield Strength ReH or Rp0,2 MPa Minimum |
Tensile Strength Rm MPa |
Elongation % Minimum A80¹) A5 |
Impact Strength Longitudinal min. t°C Charpy V J |
3.0mm – 10.0mm |
700 ²) |
750 – 930 |
-- 15 |
-20 ³) 40 ³) |
Yield and tensile strength are tested longitudinal to the rolling direction, and guaranteed both in the longitudinal and
transverse directions. Elongation is tested longitudinal to the rolling direction.
Impact strength is tested by the Charpy V impact test in accordance with Standard EN 10045-1. The requirement
value 40 J means tests carried out with 10 x 10 longitudinal standard test pieces. When testing thicknesses less
than 10mm, the width of the test pieces corresponds with the strip thickness and the requirement values decrease
in direct relation to the surface area of the test piece.
No impact tests are carried out for thicknesses less than 6mm.
¹) Elongation A80 is used for thickness below 3mm.
²) For thickness (8) – 10mm the minimum yield strength can be 20 Mpa lower.
³) If agreed upon separately, Optim 700 MC can also be delivered with guaranteed impact strength Charpy V ≥29 J
at the temperature of -40°C.
Chemical Composition Content (ladle analysis)
C max. |
Si max. |
Mn max. |
P max. |
S max. |
AI max. |
CEV % |
0.10 |
0.20 |
2.10 |
0.020 |
0.010 |
0.015 |
0.37 ave. - 0.41 max. |
Processing
Welding
The weldability is excellent and all the common welding processes can be used. Preheating is not necessary under normal conditions. A narrow heat affected zone (HAZ) with a somewhat lower strength is formed immediately adjacent to the weld. The softening tendency can be limited by avoiding unnecessarily high heat input during welding. In applications where high strength is required, the welded joints should be placed in the less stressed locations. So, the effect of welds on the structure will be minimised. Matching welding materials are recommended when high strength of the weld is needed. Alternatively, undermatching consumables may be used if the weld is located in a less stressed part of the structure.
Cutting
Optim 700 MC steel can be cut easily using thermal methods such as flame, plasma, and laser cutting. Mechanical cutting can also be applied, but attention must be paid to the stiffness of the equipment, blade condition and clearance, and support the work piece.
Heat Treatment
Welded structures do not normally require any heat treatment after fabrication. If stress relieving is required, however, it must be carried out in accordance with the following recommendations:
Forming
Optim 700 MC steel is suitable for cold forming.
Minimum permissible bending radius, bending angle 90°
Minimum permissible inside bending radius mm.
Chemical Composition Content (ladle analysis)
Thickness mm (2.5) - 3 |
(3) - 4 |
(4) - 5 |
(5) - 6 |
(6) - 7 |
(7) - 8 |
(8) - 10 |
3.5 |
5 |
6 |
8 |
12 |
14 |
16 |
Heat Treatment Recommendations
Heat Treatment |
Temperature °C |
Treatment time & manner of cooling |
Stress relieving |
550 – 580 (target 560) |
2 minutes/mm thickness, min. 30 minutes. Slow cooling in the furnace |
Hot-Dip Galvanising
Optim 700 MC steel can be hot-galvanised. Control of the galvanising parameters produces a smooth and durable
coating.
Further information on processing in thermal cutting and flame straightening datasheets.
Inspection Document
An inspection certificate 3.1 in compliance with EN 10204 is granted. The inspection document states the chemical composition of steel based on cast analysis and hardness in delivery condition.
Full specification and details are available on request.
The above information is provided for guidance purposes only.
For specific design requirements please contact our technical sales staff.
AJ Marshall - Abrasion Resistant Steel Plate & High Strength Steel Specialists - COR-TEN® - Weathering Fine Grain Structural Steel - 12-14% Manganese Steel- CREUSABRO M Wear Resistant Steel with High Manganese Content - S690QL1 - High Strength, Quenched & Tempered Fine-Grain Structural Steel - XAR®300 - Wear Resistant Special Structural Steel - RAEX®400 - Wear Resistant Steel Plate - RAEX®500 - Wear Resistant Steel Plate - OPTIM 700MC - High Strength Steel - A J Marshall - Product Menu Page - A J Marshall - Steel Plate Processing - AJ Marshall - Contact Us For A Quote