Fora 400

FORA 400
A 400 HB wear resistant steel
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 a wear resistance to wear by sliding or by moderate impacts is required. Compared to conventional steels, such asS355, 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 off fabrication. This steel is particularly suitable for applications in quarries, construction industry, mines,cement plants, iron and steel industry, etc…

STANDARD

FORA 400

CHEMICAL ANALYSIS

Typical values (% weight) C 0.20 S max 0.005 P max 0.02 Cr 1.00 Mn 1.60 Mo 0.30

t = 3/16 mm (0.12/0.62") Ceq ≤ 0.49 % t = 17/50 mm (0.66/1.97") Ceq ≤ 0.55 % t > 50 mm (>1.97") Ceq ≤ 0.64 %

Ceq = C +

Mn Cr + Mo+ V Ni+ Cu + + 6 5 15

MECHANICAL PROPERTIES

Typical values KCV long. KCV long. -20°C(-4°F) -40°C (-40°F) 1350 35 J/cm² (t=15mm) 20 J/cm² (t=15mm) 400 HB 13 N/mm² 65 J/cm² (t=5mm) 45 J/cm² (t=5mm) 21 ft.lb (t=15mm) 12 ft.lb (t=15mm) 42.5 HRC 160 KSI 195 KSI 13 38 ft.lb (t=5mm) 27 ft.lb (t=5mm) Hardness guaranteed at delivery: 360 / 440 HB (39 / 47 HRC) mini 1 Prismatic tensile values. Hardness UTS
1

Yield 1 Strength 1100 N/mm²

El%

FORA 400 – 18.03.2002 Issue – Page 1ABRASION RESISTANCE PROPERTIES

Wear tests data :
Lifetime Lifetime Lifetime

15 10 5

Low energy impact Dry media
Fora400 S355

15 10 5

Medium energy impact Wet media
Fora400

15 10 5
hardness

High energy impact
Fora400

S355

S355 hardness

hardness

Quartzite ... Coke ... Au, Ag ... Bauxite Fe, Cu, Zn

Quartzite ... Coke ... Au, Ag ... Bauxite Fe, Cu, Zn DolomiteKaolin Calcareous Gypsum

minerals

Typical relative lifetime data issued from field tests Fora 400 performs two times better than S355 in all wear conditions.

PROCESSING

Cutting All the classical thermal cutting processes are compatible with FORA 400 (gas, plasma, laser). Plates between 4 to 40 mm (0.16” to 1.6”) thick do not require preheating provided that thermal cutting is performedat 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 ↓ ≥ 10°C (50°F) < 10°C (50°F) 4 – 40 mm > 40 mm (0.16" – 1.6") > 1.6" No pre-heating Preheating at 100–150°C (212-302°F) Preheating at 100–150°C (212-302°F)

Water jet cutting or shearing canalso be used. Machining Drilling and milling should be performed with supercarburized cobalt high-speed steel type HSSCO, using wherever possible an oil lubricant. However, classical high-speed steels can be used. The typical cutting parameters are : Drilling Cutting Speed
Rotational speed Feed Ø = 10 mm 6-12 20-40 300 0,1 Ø = 20 mm 6-12 20-40 150 0,2 Ø = 30 mm 6-12 20-40 100 0,3

DolomiteKaolin Calcareous Gypsum

m/min ft/min rev/min mm/rev

Tapping
Cutting Speed Rotational speed m/min ft/min rev/min

Ø = 10 mm 2-4 6.5-13 120

Ø = 20 mm 2-4 6.5-13 70

Milling
Cutting Speed Rotational speed Feed m/min ft/min rev/min mm/rev

Ø = 10 mm 25-30 80-100 625 0,2

Ø = 20 mm 25-30 80-100 450 0,18

Bending Thanks to the high refining level of the steel (low sulphur andphosphorous contents), FORA 400 is easy to bend provided that following conditions are respected : Ø Dressing (or grinding) of the ridges caused by gas-cutting to limit hardened zones Ø Sufficiently powerful equipment Ø Respect of minimum forming radius
FORA 400 – 18.03.2002 Issue – Page 2

Quartzite ... Coke ... Au, Ag ... Bauxite Fe, Cu, Zn Dolomite Kaolin Calcareous Gypsum

Ø = 30 mm 2-4 6.5-13...