4140 Aircraft Annealed & Cold Finished Alloy

This chromium molybdenum alloy is a deep hardening steel used where strength and impact toughness are required. It has high fatigue strength making it suitable for critical stressed applications at normal as well as elevated temperatures. For increased resistance to wear and abrasion, it may be nitrided.
This grade is a quality product melted under the best of steelmaking practices for aircraft quality steels. It is vacuum degassed to meet the magnetic particle inspection standards of AMS 2301.

UNS G41400, MIL-S-5626 - AMS 6382 - AMS 2301

Color Marking:
Normalized Bars—Ends painted Gray
Annealed Bars—Ends painted Brown

Physical Conditions C
Surface Condition 4

Stock Lengths: 12' and 20'

Maximum Brinell 241

Size	Estimated Weight per Foot	Estimated Weight 12-Ft. Bar
1/4	N/A .1671 lb	N/A 2.005 lb
5/16	N/A .2610 lb	N/A 3.132 lb
3/8	N/A .3759 lb	N/A 4.510 lb
7/16	N/A .5116 lb	N/A 6.139 lb
1/2	N/A .6682 lb	N/A 8.019 lb
9/16	N/A .8457 lb	N/A 10.15 lb
5/8	N/A 1.044 lb	N/A 12.53 lb
11/16	N/A 1.263 lb	N/A 15.16 lb
3/4	N/A 1.504 lb	N/A 18.04 lb
13/16	N/A 1.765 lb	N/A 21.17 lb
7/8	N/A 2.046 lb	N/A 24.56 lb
15/16	N/A 2.349 lb	N/A 28.19 lb
1	N/A 2.673 lb	N/A 32.07 lb
1 1/16	N/A 3.017 lb	N/A 36.21 lb
1 1/8	N/A 3.383 lb	N/A 40.59 lb
1 3/16	N/A 3.769 lb	N/A 45.23 lb
1 1/4	N/A 4.176 lb	N/A 50.12 lb
1 5/16	N/A 4.604 lb	N/A 55.25 lb
1 3/8	N/A 5.053 lb	N/A 60.64 lb
1 7/16	N/A 5.523 lb	N/A 66.28 lb
1 1/2	N/A 6.014 lb	N/A 72.17 lb
1 5/8	N/A 7.058 lb	N/A 84.70 lb
1 3/4	N/A 8.186 lb	N/A 98.23 lb
1 7/8	N/A 9.397 lb	N/A 112.8 lb
2	N/A 10.69 lb	N/A 128.3 lb
2 1/4	N/A 13.53 lb	N/A 162.4 lb
2 1/2	N/A 16.71 lb	N/A 200.5 lb
2 3/4	N/A 20.21 lb	N/A 242.6 lb
3	N/A 24.06 lb	N/A 288.7 lb

1/4

N/A .1671 lb

N/A 2.005 lb

5/16

N/A .2610 lb

N/A 3.132 lb

3/8

N/A .3759 lb

N/A 4.510 lb

7/16

N/A .5116 lb

N/A 6.139 lb

1/2

N/A .6682 lb

N/A 8.019 lb

9/16

N/A .8457 lb

N/A 10.15 lb

5/8

N/A 1.044 lb

N/A 12.53 lb

11/16

N/A 1.263 lb

N/A 15.16 lb

3/4

N/A 1.504 lb

N/A 18.04 lb

13/16

N/A 1.765 lb

N/A 21.17 lb

7/8

N/A 2.046 lb

N/A 24.56 lb

15/16

N/A 2.349 lb

N/A 28.19 lb

N/A 2.673 lb

N/A 32.07 lb

1 1/16

N/A 3.017 lb

N/A 36.21 lb

1 1/8

N/A 3.383 lb

N/A 40.59 lb

1 3/16

N/A 3.769 lb

N/A 45.23 lb

1 1/4

N/A 4.176 lb

N/A 50.12 lb

1 5/16

N/A 4.604 lb

N/A 55.25 lb

1 3/8

N/A 5.053 lb

N/A 60.64 lb

1 7/16

N/A 5.523 lb

N/A 66.28 lb

1 1/2

N/A 6.014 lb

N/A 72.17 lb

1 5/8

N/A 7.058 lb

N/A 84.70 lb

1 3/4

N/A 8.186 lb

N/A 98.23 lb

1 7/8

N/A 9.397 lb

N/A 112.8 lb

N/A 10.69 lb

N/A 128.3 lb

2 1/4

N/A 13.53 lb

N/A 162.4 lb

2 1/2

N/A 16.71 lb

N/A 200.5 lb

2 3/4

N/A 20.21 lb

N/A 242.6 lb

N/A 24.06 lb

N/A 288.7 lb

Size

Estimated Weight per Foot

Estimated Weight 12-Ft. Bar