FUSHUN Metals

AISI 4140 Alloy Steel Tube

Group Hollow Bars
Min. Order 1 piece
Terms of Payment all
Update Time 2019-06-18
Item specifics
OD40-400MM
WT5-30MM
Delivery conditionQT
Surface conditionpeeled
  • Description
  • Product review
Introduce

4140 Seamless Tubing Are The Low Alloy Materials Used In The Industries. It Consists Of Manganese, Molybdenum And Chromium Chemical Components Which Adds Advanced Properties And Characteristics To AISI 4140 Material. Hence, Making It More Applicable For The Applications As Compared To Other Materials.The Molybdenum Chemical Component Used To Enhance The Resistivity Of The Material In High Elevated Temperatures.

Applications

Superior tensile strength and toughness

High strength to weight ratio

Easily heat treatable to a broad range of strength, machinability, and hardness.

Applications: aircraft components, hydraulic cylinders, rollers, structural apps, truck and automotive parts.

Tube Size

Type and Finish:

Seamless and Welded

Hot Finish and Cold Drawn


Thermal Treatments:

Quenched and Tempered

Annealed

Stress Relieved

Normalized

Customer Spec

CD SRA 100,000 min. yield


Sizes Available:

Hot Finish
2″ – 20″ OD
.250″ – 3.00″ walls

Cold Drawn
.688″ – 8.00″ OD
.035″ – .875″ walls

Chemical Composition (%)

Steel (UNS)

C

Si

Mn

P (≤)

S (≤)

Cr

Mo

4140 (G41400)

0.38-0.43

0.15-0.35

0.75-1.00

0.035

0.040

0.80-1.10

0.15-0.25

Mechanical Property

Steel

Tensile strength (Mpa)

Yield strength (Mpa)

Elongation in 50 mm, %

Reduction in area, %

Hardness (HB)

Sample diameter

Conditions

AISI 4140

1020

655

17.7

46.8

302

25.4mm (1 inch)

Normalized at 870 °C

655

414

25.7

56.9

197

Annealed at 815 °C

1075

986

15.5

56.9

311

Water quenched from 845 °C & tempered at 540 °C

Equivalent Material

USA

European Union

China

Japan

Standard

Grade (UNS)

Standard

Grade (Steel Number)

Standard

Grade

Standard

Grade

AISI;
SAE;
ASTM A29/A29M

4140 (G41400)

EN 10083-3

42CrMo4 (1.7225)

GB/T 3077

42CrMo

JISG 4105

SCM440

Heat Treatment

AISI 4140 has enough carbon present to allow for adequate heat treatment. Recommended hardening procedures are to bring the steel up to 1,675 degrees Fahrenheit for normalization (removal of stress within the steel). After it cools properly, heat the steel to 1,550 degrees Fahrenheit before quenching it in oil. The toughness of the steel makes machining in its hardened form difficult. However, after annealing the steel at 1,600 degrees followed by a slow cooling, the steel is much softer and far easier to machine. It can then be heat-treated after machining to produce a hard, precise item.

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