Steel 4130 Round Bar Prices
Current 4130 Steel Round Bar prices by dimension, with $/lb for cross-size comparison.
4130-Hot Rolled Round Bar currently ranges from $1.78/lb to $2.57/lb, down 6.3% over the last 7 days.
About 4130|The weldable chromoly. Same chromium-molybdenum family as 4140 but with 0.30% carbon instead of 0.40%. That lower carbon makes a real difference in weldability and ductility while still giving good strength after heat treatment. This is the aerospace tube and race car chassis steel. 4130 tube is everywhere in aircraft frames, roll cages, and structural fabrication where you need to weld chromoly and trust the joint. Machines well in the annealed condition. Not as strong as 4140 when heat treated because of the lower carbon, so if you're making a shaft or gear that needs maximum hardness, go with 4140 or 4340. But if the part gets welded, 4130 is almost always the better choice. Compare to 4140 (stronger but harder to weld) and 1045 (cheaper, similar strength range but no alloy content for hardenability in thick sections).
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
2.1%30d
Steel HRC
$1,218/short ton
$0.61/lb
Hot Rolled Coil (HRC) is the benchmark for raw steel prices.
Show additional sizes(18 products, retail pricing)
Diameter
Diameter | $/lb | $/ft | 7d |
|---|---|---|---|
| 3" | $2.18 | $52.44 | 0.0% |
| 3-1/4" | $2.53 | $71.65 | 9.0% |
| 4" | $2.04 | $87.24 | 5.7% |
| 4-1/2" | $2.07 | $112.04 | 10.4% |
| 4-3/4" | $2.17 | $130.87 | — |
| 5" | $2.34 | $156.36 | 0.0% |
| 5-1/4" | $2.15 | $163.14 | 10.4% |
| 5-1/2" | $1.91 | $154.43 | 11.6% |
| 6" | $1.78 | $171.28 | 14.8% |
| 6-1/2" | $2.14 | $241.67 | 10.1% |
| 7" | $2.15 | $281.44 | 10.4% |
| 7-1/2" | $2.17 | $326.26 | — |
| 8-1/2" | $2.07 | $399.76 | 10.8% |
| 9" | $2.11 | $456.39 | 0.0% |
| 10" | $2.57 | $686.19 | 0.0% |
15 items
Prices last updated August 2026
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