Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm

Product Details
Type: Square
Standard: ASTM
Technique: Hot Rolled
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  • Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm
  • Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm
  • Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm
  • Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm
  • Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm
  • Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm
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Basic Info.

Model NO.
SAE4340
Shape
Bar
Surface Treatment
Polished
Special Use
Cold Heading Steel
Transport Package
Wooden Box
Specification
Width 10-2000mm
Production Capacity
50000kgs

Product Description

Introduction:

 

Grade 1.6511 / SAE4340 has the characteristic of high strength, toughness and good hardenability and anti-overheating stability, but the white point sensitivity is high, and there is temper brittleness.The welding property is poor, before welding, it needs to be preheated by high temperature. After welding, the stress should be eliminated and used after adjustment.

 

 

Chemical composition(%):

 
C Si Mn S P Cr Mo Ni
0.38~0.43 0.15~0.35 0.60~0.80 ≤0.040 ≤0.035 0.70~0.90 0.20~0.30 1.65~2.00


Application:


Used as require good toughness, high strength, as well as the important conditioning of large size, heavy machinery such as high load of axial, turbine shaft, larger than 250 mm in diameter of helicopter rotor shaft, turbojet engine turbine shaft, blade, high load of transmission parts, fasteners of the crankshaft,gear, etc.
It can also be used for operating temperature over 400 ºC of rotor shaft and blade, etc. and after nitriding processing can also be used to make special performance requirements of the important parts, after low temperature tempering or can be used for ultra-high strength steel after thermal quenching.


Features:


Excellent hardenability, high toughness and good heat-resistance and fatigue-resistance.


Heat treatment:

 
Quenching Tempering
Heating temperature/ºC Cooling Heating temperature/ºC Cooling
850 Oil cooling 600 Water or oil cooling
Hardness ≤269HB
 

Mechanical properties:


Tensile strength sigma b (MPa): ≥980(100),
The elongation is delta 5 (%): ≥12,
The cross-sectional shrinkage of psi (%): ≥55.
Impact work Akv (J) is greater than 25, impact toughness value alpha kv (J/cm2): ≥98 (10).


Delivery time:

 

Hot rolled or forged, black surface.
For abundant stock, 15-20 days.For customized products, 30-50 days.

 
Our main products
Platic mould steel:

S50C, P20, P20+Ni, P21, 420

Hot work mould steel: H13/1.2344, H21/1.2581
Cold work mould steel: D2, D3, O1/1.2510
Alloy steel: 1.7035, 1.7225, En31, 1.6523
High speed steel: M2/1.3343, T1/1.3355, M35, M42
 

Product products:

 

 

 
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Material SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mmMaterial SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mmMaterial SAE4340 Per ASTM A322 Rectangular Bar Hot Rolled Annealed 228hb Surface Free of Scale Tolerances 1mm

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