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 $1.93/lb to $4.02/lb, flat 0.0% over the last 7 days.

Eric Na

Ordering in quantity? I'll pull 3~4 supplier quotes.

Send me your spec, quantity, and need-by date. I'll contact the suppliers, follow up until they quote, and send back price and lead time side by side in 2~3 business days. You place your own PO. The first RFQ is free.

Eric Na · Founder, Material Price Book

Get quotes on this spec

Already have a supplier quote in hand? Check if the price is fair.

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.
Raw Material Market Prices
2.8%30d
Steel HRC
$1,339/short ton
$0.67/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"$4.02$2.68
0.0%
5/8"$3.39$3.54
0.0%
3/4"$2.60$3.91
0.0%
7/8"$2.55$5.21
0.0%
1"$2.45$6.54
0.0%
1-1/8"$2.45$8.28
0.0%
1-1/4"$2.45$10.22
0.0%
1-3/8"$2.45$12.37
0.0%
1-1/2"$2.45$14.72
0.0%
1-5/8"$2.45$17.27
0.0%
1-3/4"$2.45$20.04
0.0%
1-7/8"$1.93$18.12
0.0%
2"$2.45$26.17
0.0%
2-1/8"$1.93$23.28
0.0%
2-1/4"$2.45$33.12
0.0%
2-3/8"$1.93$29.07
0.0%
2-1/2"$2.45$40.89
0.0%
2-5/8"$1.93$35.51
0.0%
2-3/4"$2.45$49.47
0.0%
3"$2.45$58.87
0.0%
3-1/8"$1.93$50.33
0.0%
3-1/4"$2.64$74.47
0.0%
3-1/2"$2.64$86.35
0.0%
3-3/4"$2.81$105.52
0.0%
4"$2.64$112.81
0.0%
4-1/4"$2.81$135.53
0.0%
4-1/2"$2.87$155.21
0.0%
4-3/4"$2.81$169.30
0.0%
5"$2.87$191.78
0.0%
5-1/4"$2.81$206.82
0.0%
5-1/2"$2.87$231.84
0.0%
5-3/4"$2.81$248.09
0.0%
6"$2.81$270.13
0.0%
6-1/4"$2.30$239.89
0.0%
6-1/2"$2.83$319.22
0.0%
6-3/4"$2.32$282.34
0.0%
7"$2.32$303.69
0.0%
7-1/4"$2.34$328.54
0.0%
7-1/2"$2.32$348.46
0.0%
7-3/4"$2.32$372.13
0.0%
8"$2.32$396.49
0.0%
8-1/4"$2.34$425.41
0.0%
8-1/2"$2.32$447.53
0.0%
8-3/4"$2.32$474.44
0.0%
9"$2.34$506.14
0.0%
9-1/4"$2.53$578.48
0.0%
9-1/2"$2.53$609.73
0.0%
10"$2.64$704.88
0.0%
10-1/2"$2.52$741.89
0.4%
11"$2.45$791.60
0.0%
11-1/2"$2.53$894.33
0.0%
12"$2.95$1183.25
0.0%
12-1/2"$2.95$1281.81
0.0%
13"$2.95$1384.32
0.0%
13-1/2"$2.95$1490.77
0.0%
14"$2.62$1422.05
0.0%
14-1/2"$2.95$1715.49
0.0%
15"$2.95$1833.77
0.0%
15-1/2"$3.10$2055.44
0.0%
16"$3.10$2188.02
0.0%
17"$3.10$2465.60
0.0%
18"$3.10$2759.75
0.0%
19"$3.10$3070.48
0.0%
20"$3.10$3310.80
0.0%
21"$3.10$3650.16
0.0%
22"$3.10$4006.07
0.0%
23"$3.10$4378.53
0.0%
24"$3.10$4872.67
0.0%
28"$3.10$6489.17
0.0%
30"$3.10$7449.30
0.0%

70 items

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