4140 Steel Round Bar

Steel 4140 Round Bar Prices

Current 4140 Steel Round Bar prices by dimension, with $/lb for cross-size comparison.

4140-Quenched & Tempered Round Bar currently ranges from $1.94/lb to $4.46/lb, up 2.5% over the last 7 days.

About 4140|The workhorse alloy steel. Chromium-molybdenum with 0.40% carbon gives you excellent strength, toughness, and wear resistance through a wide range of heat treatments. Available annealed, normalized, or pre-hardened (Q&T to 28-32 HRC). Pre-hardened 4140 machines well with carbide at moderate speeds. Don't dwell or take light cuts. It will work-harden if you rub instead of cut, so keep the feed up (0.006-0.010 IPR minimum) and maintain a productive depth of cut. Chips break cleanly. Weldable with preheat and proper procedure, but it's not casual. The 4140 you buy at the distributor is not all the same. 'Pre-hard' is vague. Ask for the actual hardness and MTRs. Compare to 4340 (stronger, tougher, more expensive), 1045 (cheaper but less hardenable), 8620 (case-hardening steel, different use case), and ETD-150 (pre-hardened alternative that skips heat treat).
About Round Bar|The default starting stock for lathe work. It gets turned, bored, and parted into shafts, pins, bushings, spacers, and just about anything round.

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See how it compares to distributor benchmarks for this order size.

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Raw Material Market Prices
2.6%30d
Steel HRC
$1,244/short ton
$0.62/lb

Hot Rolled Coil (HRC) is the benchmark for raw steel prices.

TemperQuenched & TemperedAnnealed
Show additional sizes(4 products, retail pricing)
Diameter
Diameter
$/lb
$/ft
7d
1/2"$4.46$2.98
2.1%
5/8"$3.38$3.53
1.5%
3/4"$2.59$3.89
2.0%
7/8"$2.55$5.21
2.4%
1"$2.44$6.51
2.1%
1-1/8"$2.44$8.25
2.1%
1-1/4"$2.44$10.18
2.1%
1-3/8"$2.44$12.32
2.1%
1-1/2"$2.44$14.66
2.1%
1-5/8"$2.44$17.20
2.1%
1-3/4"$2.44$19.95
2.1%
1-7/8"$1.94$18.21
3.2%
2"$2.44$26.06
2.1%
2-1/8"$1.94$23.40
3.2%
2-1/4"$2.44$32.99
2.1%
2-3/8"$1.94$29.22
3.2%
2-1/2"$2.44$40.72
2.1%
2-5/8"$1.94$35.70
3.2%
2-3/4"$2.44$49.26
2.1%
3"$2.44$58.63
2.1%
3-1/8"$1.94$50.60
3.2%
3-1/4"$2.64$74.47
2.3%
3-1/2"$2.64$86.35
2.3%
3-3/4"$2.44$91.62
3.4%
4"$2.64$112.81
2.3%
4-1/4"$2.44$117.68
3.4%
4-1/2"$2.49$134.66
3.3%
4-3/4"$2.44$147.01
3.4%
5"$2.49$166.39
3.3%
5-1/4"$2.44$179.58
3.4%
5-1/2"$2.49$201.14
3.3%
5-3/4"$2.44$215.43
3.4%
6"$2.44$234.56
3.4%
6-1/4"$2.32$241.98
3.6%
6-1/2"$2.46$277.49
3.4%
6-3/4"$2.34$284.78
3.5%
7"$2.34$306.31
3.5%
7-1/4"$2.36$331.34
3.1%
7-1/2"$2.34$351.47
3.5%
7-3/4"$2.34$375.34
3.5%
8"$2.34$399.91
3.5%
8-1/4"$2.36$429.05
3.1%
8-1/2"$2.34$451.39
3.5%
8-3/4"$2.34$478.53
3.5%
9"$2.36$510.47
3.1%
9-1/4"$2.55$583.06
2.8%
9-1/2"$2.55$614.55
2.8%
10"$2.66$710.22
3.1%
10-1/2"$2.54$747.78
2.4%
11"$2.45$791.60
0.0%
11-1/2"$2.55$901.40
2.8%
12"$2.98$1195.28
2.8%
12-1/2"$2.98$1294.85
2.8%
13"$2.98$1398.40
2.8%
13-1/2"$2.98$1505.93
2.8%
14"$2.64$1432.90
3.1%
14-1/2"$2.98$1732.94
2.8%
15"$2.98$1852.42
2.8%
15-1/2"$2.81$1863.16
1.1%
16"$2.81$1983.33
1.1%
17"$2.81$2234.95
1.1%
18"$2.81$2501.58
1.1%
19"$2.81$2783.24
1.1%
20"$2.81$3001.08
1.1%
21"$2.81$3308.69
1.1%
22"$2.81$3631.31
1.1%
23"$2.81$3968.93
1.1%
24"$2.81$4416.84
1.1%
28"$2.81$5882.12
1.1%
30"$2.81$6752.43
1.1%

70 items

Prices last updated September 2026

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