Alloy 4150 in bar
SPECIFICATIONS: GRADE ALLOY 4150, AISI 4150, UNS G41500
Castle Metals stocks Alloy 4150 in rounds, squares and flats throughout our distribution network, which spans the United States, Mexico, Canada, France, U.K, Singapore, and Shanghai. When customers call us about 4150, sometimes we also hear about their struggles achieving specific material properties. When Castle hears this, delivering custom material properties by thermal or mechanical treatment can be a solution we discuss with you.
Alloy 4150 is a direct hardening alloy which allows flame and induction hardening. Direct Hardening alloys can be quenched and tempered to obtain a wide range of hardness, ductility, and strength levels while also being able to resist stress. Alloy 4150 develops good hardness and uniform strength while also being easy to machine.
The Telcut 50® Alloy is the same as Alloy 4150 but with a double machining additive. It is used for heavily machined applications like screw machine parts and has a machinability rating of 100%. Lower cycle times, less tool wear, better surface finish, and improved productivity are achieved with no sacrifice in mechanical properties or heat treat response.
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.
Bar Properties
Grade 4150 Properties
Shape |
Size Range |
Condition of Steel |
Specification |
Relative Machinability Based on aisi 1212 as 100% |
Rounds | 1" - 12" |
Hot Rolled M.S. & Annealed - 229 HBW MAX |
ASTM A29/A322 |
60% |
10"-20" |
Forged & Rough Turned & Annealed |
ASTM A29/A322 |
60% |
|
3/8" - 5" |
Cold Finished & Annealed- 241 HBW MAX |
ASTM A29/A108 |
60% |
|
1.5" - 12" |
Hot Rolled & Heat Treated 285/341 HBW |
ASTM A29/A322/ A434-CLASS BD* |
55% |
|
10"- 20" |
Forged & Rough Turned & Heat Treated |
ASTM A29/A322 |
55% |
|
Squares |
1" - 6" |
Hot Rolled M.S. & Annealed |
ASTM A29/A322 |
60% |
Flats |
1/2" - 11/4" Min. .4"x6" Max. |
Hot Rolled & Annealed |
ASTM A29/A322 |
60% |
Castle 4150 annealed bars are 80% minimum lamellar pearlite for improved machinability.
Castle 4150 quench and tempered "STRESS FREE" bars - minimum mechanical properties.
Spec |
size range |
tensile- ksi |
yield- ksi |
elongation-% |
red. of area-% |
285/341 HBW ASTM A434- Class BD Rounds |
To 1.5" |
155 |
130 |
14 |
35 |
>1.5" to 2.5" |
150 |
120 |
14 |
35 |
|
>2.5" to 4" |
140 |
110 |
14 |
35 |
|
>4" to 7" |
135 |
105 |
14 |
35 |
|
>7" to 9.5" |
130 |
100 |
14 |
35 |
|
285/341 HBW Rounds |
>9.5" to 12" |
Reported |
Reported |
Reported |
Reported |
For more information, see Alloy Steel Quick Guide
Chemistry(range or Maximum in %)
Chemistry (range or maximum in %)
grade | c |
mn |
p max |
s max |
si |
ni |
cr |
mo |
4150 | .48/.53 |
.75/1.00 |
0.035 |
0.04 | .15/.35 | - |
.80/1.00 |
.15/.25 |