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Steel circle AISI 4340

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Steel circle AISI 4340

The goods can be picked up by self-delivery at metal depots in Kyiv. Also, in agreement with the customer, rolled metal products can be delivered to any region of Ukraine

  • Characteristics
  • Description

AISI 4340 steel circle delivery forms

Steel circles

Steel grades

Dimensions supplied (mm)

AISI 4340 steel circle

50 – 485

AISI 4340 steel

marked AISI 4340 belongs to the category of low-alloy heat-treatable alloys. The composition of steels of this type contains chromium, nickel and molybdenum additives in various concentrations.
Key benefits include:
high durability;
ease of processing;
possibility of additional hardening (cementing, nitriding) ;
Corrosion resistance;
deformation resistance;
good plasticity.
Features and Applications
The main forms of release are: steel circle 4340, bar, rebar, wire. Depending on the manufacturing technology, there are forged wheels 4340, cold-rolled and hot-rolled
The main direction of use is the production of elements, parts, structures with high requirements for rigidity and strength, as well as with minimal wear. Alloys of this grade are used in mechanical engineering for the production of parts for transmission boxes and systems, for the manufacture of shafts and universal joints, gearboxes.
In addition, AISI 4340 alloys and their closest analogues are used for the production of aircraft landing gear. The world’s largest aircraft manufacturers have appreciated the reliability and durability of this series alloys in those situations where it is required to ensure maximum safety under fairly severe regular loads.

AISI 4340 steel chemical composition

Standard

Grade

C

Mn

P

S

Si

Ni

Cr

Mo

ASTM A29

4340

0.38-0.43

0.60-0.80

0.035

0.040

0.15-0.35

1.65-2.00

0.70-0.90

0.20-0.30


AISI 4340 mechanical properties

Mechanical Properties

( Heat Treated Condition )

Condition

Ruling section
mm

Tensile Strength MPa

Yield Strength
MPa

Elong.
%

Izod Impact
J

Brinell
Hardness

T

250

850-1000

635

13

40

248-302

T

150

850-1000

665

13

54

248 -302

U

100

930-1080

740

12

47

269-331

V

63

1000-1150

835

12

47

293-352

W

30

1080-1230

925

11

41

311-375

X

30

1150-1300

1005

10

34

341-401

Y

30

123 0-1380

1080

10

24

363-429

Z

30

1555-

1125

5

10

444-

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