Prime Mill Forged 4340 Steel Bar Connecting Rod

Product Details

Prime Mill Forged 4340 steel bar connecting rod

Forged 4340 steel we can supply with round, square and flat shapes, black and bright surface.

AISI 4340 steel is Nickel Chromium Molybdenum alloy steel known for its toughness and ability to attach high strength in the heat treatment.
1. Advantages:
aisi4340 steel has good toughness in heat treated condition and very good fatigue resistance.
2. Application: aisi4340 steel can be used to produce commercial and military aircraft, automobile systems, forged hydraulic and other machine tool and forged steel crankshafts.
3. Production Line: EAF(EBT) ? LF ? VD ? IC ? ESR ? AOD ? Forging ?NDT ? Rough Machining ? NDT ? Heat Treatment ? NDT ? Finish Machining ? Consignment
4. Steel Grades in different standards:

GB

JIS

DIN

ASTM/AISI/SAE

40CrNiMo(A)

--

--

4340

5. Chemical composition:


C

SI

MN

S

P

Cr

Mo

Ni

40CrNiMo(A)

0.37-0.44

0.17-0.37

0.50-0.80

0.035 (max)

0.035 (max)

0.60-0.90

0.15-0.25

1.25-1.65

AISI 4340

0.38-0.43

0.15-0.35

0.60-0.80

0.035 (max)

0.035 (max)

0.70-0.90

0.20-0.30

1.65-2.00

6. Mechanical Properties:

Yield Strength(MPa)

Tensile Strength(MPa)

Elongation (%)

AKV

835(min)

985(min)

12(min)

55(min)

7. Delivery condition and Dimensions:

Forged round bar

200mm to 800mm

forged square bar

200*200mm to 800*800mm

forged ring

OD: 200mm to 800mm

8. Dimension Tolerances: +/-5mm for black surface and +/-3mm after peeled/rough turned.
9. Processing:
Surface Treatment: Peeling, Turning, Grinding, Milling, Drilling, Boring
Heat Treatment: Normalizing, Annealing, Quenching+ Tempering
10. Markings: Material, Dimension, Heat No.

Third Party inspection that is preferred by new customers is proved to be convincing. Through years’ of operation, M/S Ruicheng Steel has established stable contact with world famous third party inspection authorities, like Lloyd’s, BV, SGS, ABS, Intertek, ect. More than 10,000Mtons of steel pipes, tubes, fittings and flanges have been inspected by them.

Any questions or inquiries will be highly appreciated.

Kindly please contact us freely at gracewang@ruichengsteel.cn

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