Specifications

4340 steel round bar
1)Dia 20-650mm
2)Technique: Hot rolled or forged
3)Surface: Black or machined
4)annealing

SAE 1045 4140 52100 8620 8640 4340 Steel Round Bar

1.Delivery condition of 4340 steel round bar: Hot-rolled, black surface

2. Chemical composition of 4340 steel round bar:

C: 0.38~0.43 Si: 0.15~0.35 Mn: 0.60~0.90 S: ≤ 0.040 P: ≤ 0.035 Cr: 0.60~0.90 Ni: 1.65~2.00 Cu: ≤ 0.025 Mo: 0.20~0.30

3. Process of 4340 steel round bar: EAF + LF + VD + Forged + Heat Treatment (optional)

4. Delivery condition of 4340 steel round bar: EAF, black

5. Technical Data of 4340 steel round bar: According to the customer's requirement of Chemical Composition, Physical Properties and Mechanical Testing

6. Test of 4340 steel round bar: Ultrasonic test according to SEP 1921-84 GR.3 CLASS C/C.

7. Material details of 4340 steel round bar:will be as per agreed technical specifications

8. Certificate of Quality of 4340 steel round bar: Issued in English, in addition the normal terms, production process, the mechanical property (yield strength, tensile strength, elongation and hardness), forged ratio, UT test result, Grain size, heat treatment methods and the sample of is shown on the Certificate of Quality.

9. Marking of 4340 steel round bar: Heat No. Will be cold stamped and Steel grade, diameter (mm), length (mm), and the manufacturer LOGO and weight (kg) is painted.