20CrNiA 4720 18NiCr5-4 1.5810 Alloy steel
MATERIAL CATEGORY: SAE, AISI, UNS system alloy structural steel
MATERIAL SPECIFICATIONS: SAE J1249 -2000
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.17~0.22
Si (%): 0.20~0.35
Mn (％): 0.50~0.70
P (％)≤: 0.035
S (％)≤: 0.040
Cr (%): 0.35~0.55
Ni (%): 0.90~1.20
Mo (%): 0.15~0.25
MECHANICAL PROPERTIES AND HOT WORKING
Mechanical property ≥ σb/MPa: 615
Mechanical property ≥ σs/MPa: -
Mechanical property ≥ δ5 (%): 25
Mechanical property ≥ ψ (％): -
Hardness /HB: 187~229
Hot working temperature /℃: 1100～850
MAIN FEATURES AND MELTING PROCESS
The steels shall be manufactured by melting process EF, LF + EAF+ VD, IFF + ESR Melted. VIM + ESR can be handled by agreement.
Forgings may be furnished in one of the following conditions: stress relieving; annealing; solution treatment; solution treatment and ageing; normalizing; normalizing and tempering; or quenching and tempering.
TYPICAL APPLICATIONS
Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.
Power generation – turbine fasteners – boiler support rods
Process plant – fasteners
Mechanical gears, gear shaft, main axis, valve rods
Mechanical parts - connecting rods, bolts and nuts
Multidiameter shafts
PRODUCT PROFILE AND SUPPLYING FORMS
Round bar (Diameter): 0.50mm to 800mm
Square bar / Flat bar: 3mm to 800mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy/middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
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