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Alloy 4140 in bar, plate, and tube

SPECIFICATIONS: GRADE ALLOY 4140, AISI 4140, UNS G41400

Castle Metals stocks a wide range of Alloy 4140 in bar distributed globally from our distribution centers in the U.S., Canada, Mexico, U.K, Singapore, and Shanghai. Customers calling for 4140 a lot of times are upset about dealing with fluctuations in their build schedules. Sometimes, we find that custom stocking programs help our customers react faster to changes.

 Alloy 4140 is a direct hardening alloy that can be quenched and tempered to obtain a wide range of hardness, ductility and strength levels. These results are influenced by both the thermal treatment applied and the alloying elements present.

The Purecut® series offers our customers the opportunity to improve machinability with the addition of Bismuth. Bismuth steels will machine equal to leaded steels without any of the environmental problems.

E4140 Aircraft Quality is a chrome-moly alloy produced in Electric Furnaces and Vacuum Degassed. When quenched and tempered, it is a relatively deep hardening steel.

This strong alloy is used for its good hardness penetration and hardness uniformity. Its high machinability and ability to maintain its properties at high temperatures make this alloy useful in many industries.

 

Applications: 

  • Drill collars
  • Bolts
  • Subs
  • Couplings
  • Reamer bodies
  • Joints
  • Shafts
  • Valves
  • Sprockets
  • Axles
  • Piston rods
  • Rams
  • Screws

Chemistry (range or Maximum in %)

Grade C
mn p max
s
si
ni
cr
mo
other
4140
 .38/.43 .75/1.00 .035 0.04
 .15/.35
-
 .80/1.00 .15/.25 -
41L40
.38/.43 .75/1.00  .035  0.04 .15/.30  -  .80/1.00  .15/.25  Pb
.15/.35
Purecut 40
 .38/.43 .75/1.00 .035 .02/.04  .15/.30 -
 .80/1.00  .15/.25  Bi
TREATED
Telcut 40
.38/.43  .70/1.00 .035  .02/.04   .15/.35  - .80/1.10 15/.25
 Se
Supercut 150
 TREATED
E4140
AIRCRAFT
QUALITY
.38/.43  .75/1.00 .025 .15/.35  .15/.35  - .80/1.10  .15/.25
 -
4140
PLATE
 .38/.44  .70/1.00  .035 .15/.40 .15/.40  - .80/1.15 
 .1/.25  -

 

Grade 4140 Hot Roll and Annealed Bar Properties

 

Grade
shape
Size Range
Condition of Steel
Specification
Relative Machinability
Based on aisi 1212 as 100%

4140



Rounds


 
3/4" - 30"
Hot Rolled/ As Rolled
ASTM A29/A322
66%
Hot Rolled &Annealed

ASTM A29/A322
Annealed & Forged & Rough Turned

ASTM A29/A322
Cold Finished & Annealed- 229 HBW MAX

ASTM A29/A108
Hexagons  7/16" - 4" Cold Finished & Annealed- 229 HBW MAX

ASTM A29/A108

66%
Squares   1/4"- 4" Cold Finished &
Annealed- 229 HBW MAX

ASTM A29/A108

66%
 41L40 Rounds
 3/16"- 6"
Hot Rolled and Annealed

ASTM A29/A322


83%
Cold Finished & Annealed- 229 HBW MAX

ASTM A29/A108
Hexagons   1/4" - 3" Cold Finished & Annealed- 229 HBW MAX

ASTM A29/A108

83%
Purecut 40
Rounds
 3/8-4" Cold Finished & Annealed- 229 HBW MAX

ASTM A29/A108

83%
Telcut 40
Rounds
 1/4" - 3"
Cold Finished & Annealed- 229 HBW MAX

ASTM A29/A108

83%
E4140 AQ Rounds


 1/4" - 4"
Cold Finished & Annealed- 241 HBW MAX

 

 
AMS 6382





66%
 3/4" - 10"
Hot Rolled M.S. & Annealed- 229 HBW MAX
Hexagons
 1/2" - 1 1/2"
Cold Finished & Annealed- 241 HBW MAX
Squares
1/2" - 1 1/2"  Cold Finished & Annealed- 241 HBW MAX
Flats  1/2" - 1 1/2" Cold Finished & Annealed- 241 HBW MAX

1/4"x1" Min.
1 1/2" X 6 Min.

Cold Finished & Annealed- 241 HBW MAX
 1"x2" Min
4"x6" Min
Hot Rolled & Annealed- HBW MAX



Castle 4140 annealed bars are 80% minimum lamellar pearlite for improved machinability

 

Grade 4140 Quenched and Tempered “Stress Free” Bar

 Minimum Properties

spec size range
Tensile-ksi
yield-ksi
elongation-% Red. of area-%
35RC MAX/
321 HBW MAX
ASTM A193 B7
ASTM A434 BC

To 1.5"

130
110
16
50
>1.5" To 2.5"
125
105
16
50
>2.5" To 4"
115
95
16
50
 285/321 HBW
ASTM A434 BC
> 4" to 7"
110
85
 16 45
 285/341 HBW
ASTM A434 BC
 >7" to 9.5"
 105  80  15 40
 285/341 HBW
HR ROUNDS
 >9.5" to 12"
 Reported Reported
Reported
Reported
 SUPERCUT 150
32/37 RC
ROUNDS
 1" to 4.125"
150
130
14
38

 

 

Grade 4140 Quenched and Tempered, Forged, Rough Turned Bar Properties

 

Spec size range
tensile-ksi  Yield-ksi
elongation-%
 Red. of area-%
285/341 HBW
Forged & RT
10" to 25"
NA
NA
NA
NA

 

 For more information, see Alloy Steel Quick Guide

 


Grade 4140 Plate Properties

gRADE sHAPE
THICKNESS
CONDITION OF STEEL
SPECIFICATION
4140
PLATE
1/4"-14"
AS ROLLED
ASTM A829

Castle’s 4140 plate is an economical Cr-Mo alloy steel that will develop high hardness and strength after heat treat. It is calcium treated for improved machining characteristics.

For more information, see Carbon, Alloy and Stainless Steel Plate Quick Guide


Grade 4140 Oil & Gas Chemistry
Grade Size range
c
mn
pmax
s
si
ni
cr
mo
cu
al
P110


1.5" - 7"
3.8/.43
.75/1.00
0.025
0.02
.15/.35
0.25
.80/1.10
.15/.25
0.35
0.02
>7" - 12"
.15/.30
4140 Hot Rolled & Annealed
All
.40/.43
.75/1.00
0.02
0.025
.15/.30
0.25
.80/1.10
.15/.25
0.35
-
L80
All
.40/.43
.75/1.00
0.025
0.025
.15/.30
.0.25
.80/1.00
.15/.25
0.35
-


Grade 4140 Oil & Gas Properties

grade Shape Size range
condition of steel
specification
P110




Rounds


1.5" - 7"
Hot Rolled, Quenched & Tempered - 341 HBW MAX AT SURFACE 
ASTM A29/A322


>7" - 12"
Hot Rolled, Quenched & Tempered - 341 HBW MAX 1" BELOW SURFACE
Tubing 2" - 20"
Hot Rolled, Quenched & Tempered
ASTM A519
4140


Rounds
1" - 12"
Annealed - 229 HBW MAX
ASTM A29/A322
Tubing
 2" - 20"
Hot Rolled
ASTM A519
L80


Rounds
2" - 12"
Hot Rolled, Quenched & Tempered
ASTM A29/A322
Tubing
2" - 20"
Hot Finished, Quenched & Tempered
ASTM A519

Castle 4140 Oil & Gas products - minimum mechanical properties:

Grade
Shape Tensile- ksi
yield- ksi
elongation- %
red. of area- %
P110
Rounds
125
110 13
35
140 Mid-Radius
Tubing 125 110 13 13
L80
Rounds 100 Min 1" below surface 95 20 40
Tubing 95 80 20 16
4140 Hot Rolled
& Annealed
 Rounds  125  105  30  60
Tubing 80 60 25 25

 

For more information, see The Oil and Gas Industry's Premier Source for Bar and Tubing Products & Carbon and Alloy Tubing Quick Guide