 |
AJ Marshall - Unit 89 Marston Moor Business Park,
Rudgate, Tockwith, York YO26 7QF. UK Sales Office - Tel: 01423 359111 Sales Office - Fax: 01423 359222 |
Email - sales@ajmarshall.com
|
FORA 400 - 400 HB Hard Wearing Steel Plate |
Technical Data
|
Scope
FORA 400 is a water quenched martensitic steel, with a typical hardness of 400HB (42.5 HRC), constituting a real answer to abrasive wear.
Thanks to its toughness, its elevated hardness, its high yield strength, FORA 400 can be used wherever resistance to wear by sliding or by moderate impacts is required.
Compared to conventional steels, such as S355, FORA 400 offers a real benefit to equipment life times and allows a significant
thickness reduction in designs since its wear resistance is up to 3 times longer than S355 grade.
Moreover, FORA 400 is very easily welded and has good forming properties thereby contributing to ease of fabrication.
Typical Applications:
This steel is particularly suitable for applications in:
· Quarries, construction and earthmoving: skimmers, crushers, screens, bunkers, bulldozers etc.
· Cement plants: buckets, crushers and bunkers.
· Mines: excavator, winding and discharging machines, conveyors, etc.
· Iron and steel industries: Bunkers, various casing, guide and shifting plates, etc.
Chemical Analysis:
Guaranteed maximum values (% weight)
C |
Mn |
P |
S |
Cr |
Ni |
Mo |
B |
0.20 |
1.4 |
0.02 |
0.003 |
1.0 |
0.5 |
0.2 |
0.003 |
Mechanical Properties:
Typical Values
Hardness |
Yield Strength ¹ |
UTS ¹ |
E 5.65 √S(1) (%) |
KCV Transv. - 20°C (- 4°F) |
KCV Transv. - 40°C (- 40°F) |
400HB |
1100 N/mm ² |
1350 N/mm ² |
13 |
35J/cm²(t=15mm) 65J/cm²(t= 5mm) |
20J/cm²(t=15mm) 45J/cm²(t= 5mm) |
42.5 HRC |
160 Ksi |
195 Ksi |
13 |
21ft.lbs(t=15mm) 38ft.lbs(t= 5mm) |
12ft.lbs(t=15mm) 27ft.lbs(t= 5mm) |
Processing
Cutting
All the classical thermal cutting processes are compatible with FORA 400 (gas, plasma, laser).
Plates between 4mm to 40mm (0.16” to 1.6”) thick do not require preheating provided that thermal cutting is performed at a temperature greater than 10°C (50°F).
Where this is not the case or where the plates are thicker than 40mm (1.6”) preheating at 100 - 150°C (200-300°F) is recommended.
Thickness → Cutting Temperature ↓ |
4 - 40mm (0.16” – 1.6”) |
> 40mm > 1.6" |
≥ 10°C (50°F) |
No preheating |
Preheating at 100 - 150°C (212 - 302°F) |
< 10°C (50°F) |
Preheating at 100 - 150°C (212 - 302°F) |
|
Machining
Hard Wearing Steel Plate.
In spite of its high wear resistance, the steel exhibits good machinability if sufficiently heavy machine-tools and sharp carbide-tipped tools are used.
The feed rate and cutting speed have to be adjusted to the high hardness of the material.
Drilling |
Ø = 10mm |
Ø = 20mm |
Ø = 30mm |
Cutting Speed m/min ft/min |
6 - 12 20 - 40 |
6 - 12 20 - 40 |
6 - 12 20 - 40 |
Rotational Speed rev/min |
190 - 380 |
90 - 190 |
60 - 120 |
Feed mm/rev |
0,1 |
0,2 |
0,3 |
Tapping |
Ø = 10mm |
Ø = 20mm |
Ø = 30mm |
Cutting Speed m/min ft/min |
2 - 4 6.5 - 13 |
2 - 4 6.5 - 13 |
2 - 4 6.5 - 13 |
Rotational Speed rev/min |
60 - 120 |
30 - 60 |
20 - 40 |
Milling |
Depth (mm) (inch) |
Cutting Speed (m/min) |
Reed (mm/tooth) |
HSSCO AR 12.0.5.5 (T15) |
1 (0.04) 4 (0.16) 8 (0.31) |
12 – 15 10 – 12 7 - 9 |
0.08 0.10 0.15 |
Bending
Thanks to the high refining level of the steel (low sulphur and phosphorus contents), FORA 400 is easy to bend provided the following conditions are respected:
· Dressing (or grinding) of the ridges caused by gas cutting to limit hardened zones.
· Sufficiently powerful equipment.
· Respect of minimum forming radius.
For plates below 20mm (0.8”) thickness, forming conditions are summarised in the following table; beyond 20mm (0.8”), consult us.
Perpendicular to the Rolling direction |
Parallel to the Rolling direction |
|
Bending internal Radius R, (mini) |
3 x th |
4 x th |
Die opening V (mini) |
10 x th |
12 x th |
Within these allowable bending parameters, the force required to form a plate is function of the bent length, the metal thickness, die opening, die form (V or U), punch form etc..
The following table shows the bending forces, for the minimum die opening (V=10th), required for V bending plates for 1m bent.
* (± 10%) |
Bending force required per meter of bend* |
| SS | Tons/m |
5mm (0.20”) |
90 |
10mm (0.40”) |
175 |
15mm (0.60”) |
260 |
20mm (0.78”) |
350 |
Welding
Thanks to its chemical analysis with a low carbon content, FORA 400 shows very good welding characteristics. It can be welded in easy conditions in total safety.
Weld Preparation
Weld surface must be dry and clean and superficially ground in order to eliminate any rust, scale, grease or paint traces as well as any gas-cutting ridges.
Weld Process
Any conventional fusion welding method can be used, such as submerged arc welding (SAW), manual
metal arc welding (SMAW), flux core wire arc welding (FCAW), MIG, MAG (GMAW) and TIG (GTAW).
Heat input should be limited to 10 - 30 kj/cm with maximum interpass temperature of 200°C (392°F).
Weld Consumables
All products in accordance with the following standards are acceptable:
Stick electrodes |
MIG-MAG |
Flux core wire gas protected |
Sumerged arc welding Wire/flux |
|
AFNOR |
NFA81-340 EY50 1niMo Bxxx1xTBH |
NF A81-322 FP/x xx/xx xB x SA31 47 05 04 |
||
AWS |
A5-5-81 E 70xx |
A5-28 ER 70 S-x |
A5-29 E 7xT5-x |
A5-23 F7P4-Exxx-A2 |
DIN |
DIN 1913 E51 55 Bx |
Preheating
Hard Wearing Steel Plate.
FORA 400 can be welded without crack risk and without preheating up to a combined plate thickness of 50mm (2”). For higher thicknesses, the following conditions are recommended:
Pre-post heating conditions – Combined thickness – mm (in)
Welding Processes |
Energy (Kj/cm) |
30 40 50 60 70 80 90 100 110 1.18 1.57 1.96 2.36 2.75 3.14 3.54 3.93 4.33 |
|||||||||
| GMAW |
15 |
||||||||||
30 |
|||||||||||
| SMAW |
10 |
||||||||||
20 |
|||||||||||
| SAW |
20 |
||||||||||
30 |
|||||||||||
| Without pre-heating 0° plate >5°C (40°F) |
With slight pre-heating 75°C (165°F) |
With pre-post heating ≥100°C (210°F) |
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 Steel | Corrosion Resistant Steel - 12-14% Manganese Steel - Work Hardening Steel - CREUSABRO M - S690QL1 - High Strength Steel Plate - Quenched & Tempered - XAR®300 - Wear Resistant Steel - XAR®400 - Wear Plate Steel - XAR®500 - Wear Resistant Steel Plate - XAR®600 - Abrasion Resistant Steel Plate - RAEX®400 - Hard Wearing Steel Plate - RAEX®700 - High Strength Quenched & Tempered Steel Plate - FORA 400 - 400 HB Hard Wearing Steel Plate - A J Marshall - Product Menu Page - A J Marshall - Steel Plate Processing - AJ Marshall - Contact Us For A Quote