Steel 4140 Plate Prices
Current 4140 Steel Plate prices by dimension, with $/lb for cross-size comparison.
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 Plate|Thick flat stock, generally 3/16" and up, used for machined base plates, fixture plates, wear surfaces, and structural fabrication. Heavier grades get milled, drilled, and tapped directly.
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Raw Material Market Prices
4.3%30d
Steel HRC
$1,084/short ton
$0.54/lb
Hot Rolled Coil (HRC) is the benchmark for raw steel prices.
Show additional sizes(7 products, retail pricing)
Rows with a colored edge have retail pricing only
Thickness
Thickness | $/lb | $/ft | 7d |
|---|---|---|---|
| 1/4"Retail | $390.46 | $332.67 | 0.0% |
| 3/8"Retail | $297.24 | $379.87 | 0.0% |
| 1/2"Retail | $243.26 | $414.51 | 0.0% |
| 5/8"Retail | $210.32 | $447.98 | 0.0% |
| 3/4"Retail | — | — | — |
| 1"Retail | $248.57 | $847.11 | 0.0% |
| 1-3/4"Retail | $156.98 | $936.22 | 0.0% |
7 items