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SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar
SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar
Specifications
MOQ :
1 Ton
Price :
US $1,020-1,380 / T
Material Grade :
SAE4340
Shape :
Bar
Surface Treatment :
Polished
Width Range :
10-2000mm
Carbon Content :
0.38~0.43%
Silicon Content :
0.15~0.35%
Manganese Content :
0.60~0.80%
Chromium Content :
0.70~0.90%
Molybdenum Content :
0.20~0.30%
Nickel Content :
1.65~2.00%
Tensile Strength :
≥980 MPa
Elongation :
≥12%
Cross-sectional Shrinkage :
≥55%
Impact Work :
>25 J
Hardness :
≤269 HB
Description
SAE4340 / 1.6511 Rectangular Bar - Hot Rolled Annealed
Material: SAE4340 per ASTM A322 • Condition: Hot Rolled Annealed • Hardness: 228HB • Surface: Free of Scale • Tolerances: ±1mm
Material Overview
SAE4340 (Grade 1.6511) offers exceptional strength, toughness, and hardenability with good resistance to overheating. This alloy steel exhibits high sensitivity to white points and temper brittleness, with welding requiring preheating and post-weld stress relief treatment.
Chemical Composition
ElementContent (%)
C (Carbon)0.38-0.43
Si (Silicon)0.15-0.35
Mn (Manganese)0.60-0.80
S (Sulfur)≤0.040
P (Phosphorus)≤0.035
Cr (Chromium)0.70-0.90
Mo (Molybdenum)0.20-0.30
Ni (Nickel)1.65-2.00
Key Features
  • Excellent hardenability for uniform properties
  • High toughness and impact resistance
  • Superior heat and fatigue resistance
  • Good anti-overheating stability
Applications
Ideal for high-stress components requiring exceptional toughness and strength, including:
  • High-load axles and turbine shafts
  • Helicopter rotor shafts (>250mm diameter)
  • Turbojet engine turbine shafts and blades
  • Heavy machinery transmission components
  • Fasteners, crankshafts, and gears
  • Components operating above 400°C
  • Nitrided parts for specialized applications
Heat Treatment
ProcessTemperatureCoolingHardness
Quenching850°COil≤269HB
Tempering600°CWater/Oil
Mechanical Properties
  • Tensile Strength (σb): ≥980 MPa (100 kgf/mm²)
  • Elongation (δ5): ≥12%
  • Reduction of Area (ψ): ≥55%
  • Impact Energy (Akv): >25 J
  • Impact Toughness (αkv): ≥98 J/cm² (10 kgf·m/cm²)
Delivery Information
Condition: Hot rolled or forged, black surface
Stock Products: 15-20 days
Customized Products: 30-50 days
Additional Steel Products
Plastic Mold Steel
DINAISI/SAEJISGBPlate Size (mm)Round Bar (mm)Process
1.12101050S50C50#10-1000×155-2200×3000-6000Ø10-350×3000-6000Hot Rolled
1.11911045S45C45#10-700×155-2200×3000-6000Ø10-300×3000-6000Hot Rolled
1.2311P20PDS-33Cr2Mo12-800×155-2200×2000-6000Ø20-200×2000-6000Forged/Hot Rolled
1.2738P20+Ni-3Cr2NiMnMo21-1000×155-2200×2000-6000Ø20-200×2000-6000Forged/Hot Rolled
1.2083420-4Cr1312-500×155-1200×2000-6000Ø12-300×3000-6000Forged/Hot Rolled
Hot & Cold Work Mold Steel
DINAISI/SAEJISGBPlate Size (mm)Round Bar (mm)Process
1.2344H13SKD614Cr5MoSiV116-500×155-500×2000-6000Ø16-200×3000-6000Forged/Hot Rolled
1.2379D2SKD10SKD106-200×155-810×2000-6000Ø10-180×3000-6000Forged/Hot Rolled
1.2080D3SKD13Cr2Mo10-200×155-810×2000-6000Ø10-180×3000-6000Forged/Hot Rolled
1.2510O1SKS39CrWMn10-200×155-810×2000-6000Ø20-200×3000-6000Forged/Hot Rolled
SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar
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SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar

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Product Detail
MOQ :
1 Ton
Price :
US $1,020-1,380 / T
Material Grade :
SAE4340
Shape :
Bar
Surface Treatment :
Polished
Width Range :
10-2000mm
Contact Supplier
SAE4340 Steel Round Bar Hot Rolled Annealed 228HB Hardness Free of Scale Surface Rectangular Bar

JIANGSU MITTEL STEEL INDUSTRIAL LIMITED

Verified Supplier
4 Years
jiangsu, wuxi
Business Type :
Manufacturer, Distributor/Wholesaler, Exporter
Main Products :
stainless steel roofing sheet, Stainless Steel Strip, Others stainless steel sheet
Total Annual :
>1000000
Employee Number :
>100
Certification Level :
Verified Supplier
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