4340 Alloy Steel Flat Bar:
Specifications Of 4340 Flat Bar:
| Specifications |
ASTM A29 |
| Grade |
4340,G43400 |
| Length |
As Required |
| Thickness |
2mm-100mm |
| Condition |
Hot rolled,Smooth turned,Peeled,Cold Drawn,Centreless Ground,Polished |
| Surface Finish |
Black, Polished |
Alloy Steel 4340 Bar Equivalent Grades:
| STANDARD |
WERKSTOFF NR. |
UNS |
| 4340 |
1.6565 |
G43400 |
4340 Steel Flat Rod Chemical Composition:
| Grade |
C |
Mn |
Si |
Cr |
Ni |
Mo |
| 4340 |
0.38-0.43 |
0.60-0.80 |
0.15-0.30 |
0.70-0.90 |
1.65-2.0 |
0.20-0.30 |
Mechanical properties :
| Tensile Strength |
Yield Strength (0.2%Offset) |
Elongation |
Hardness |
| 850-1000MPa |
680-860MPa |
14 % |
24-28HRC |
4340 Steel Bar UT Test :
Our 4340 alloy steel flat bars undergo rigorous ultrasonic testing (UT) to ensure internal soundness and defect-free structure. This non-destructive testing method detects internal discontinuities such as cracks, voids, and inclusions that are invisible to the naked eye. UT inspection is conducted in accordance with industry standards, ensuring each bar meets high-performance requirements for aerospace, automotive, and heavy-duty engineering applications. Reliable quality control guarantees enhanced fatigue resistance, structural integrity, and customer confidence.
4340 Alloy Bar PMI Test :
4340 Bar Hardness Test :
4340 Steel Flat Bar Test Report :
According to: Standard ASTM A370-24a.
Applications of AISI 4340 Alloy Bar
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High Tensile Steel Flat 4340 Packing: