Steel 4150 Round Bar Prices
Current 4150 Steel Round Bar prices by dimension, with $/lb for cross-size comparison.
4150-Annealed Round Bar currently ranges from $1.73/lb to $2.47/lb, down 1.0% over the last 7 days.
About 4150|4140's stronger sibling. Same chromium-molybdenum alloy system but with 0.50% carbon instead of 0.40%. The extra carbon gives higher achievable hardness (up to HRC 55+ vs 50-55 for 4140) and better wear resistance, but at the cost of reduced toughness, ductility, and weldability. Used for parts that need to be harder than what 4140 can deliver: heavy-duty gears, high-strength shafts, and tooling. More difficult to machine than 4140, especially in the hardened condition. Needs careful heat treatment to avoid cracking. If you're specifying 4150, make sure you actually need the extra hardness. Most applications are fine with 4140 at the right temper. Compare to 4140 (tougher, easier to work with, usually sufficient) and ETD-150 (which is essentially elevated-temperature-drawn 4150 chemistry).
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.
Get pricing analysis in your inbox
The Material Report, twice a month.
Raw Material Market Prices
2.9%30d
Steel HRC
$1,079/short ton
$0.54/lb
Hot Rolled Coil (HRC) is the benchmark for raw steel prices.
Diameter
Diameter | $/lb | $/ft | 7d |
|---|---|---|---|
| 2-1/2" | $2.36 | $39.39 | 1.3% |
| 2-3/4" | $2.36 | $47.65 | 1.3% |
| 3" | $2.36 | $56.71 | 1.3% |
| 3-1/4" | $2.18 | $61.50 | 1.4% |
| 3-1/2" | $2.36 | $77.20 | 1.3% |
| 3-3/4" | $2.18 | $81.86 | 1.4% |
| 4" | $1.73 | $73.92 | 0.0% |
| 4-1/4" | $2.19 | $105.62 | 1.4% |
| 4-1/2" | $2.19 | $118.44 | 1.4% |
| 5" | $2.19 | $146.20 | 1.4% |
| 5-1/4" | $2.19 | $161.18 | 1.4% |
| 5-1/2" | $2.19 | $176.91 | 1.4% |
| 5-3/4" | $2.19 | $193.36 | 1.4% |
| 6" | $2.19 | $210.52 | 1.4% |
| 6-1/4" | $2.19 | $228.42 | 1.4% |
| 6-1/2" | $2.35 | $265.08 | 1.3% |
| 7" | $2.47 | $323.32 | 2.1% |
17 items
Prices last updated May 2026
Related Items
11L17 Round Bar12L14 Round Bar41L40 Round Bar86L20 Round Bar1008 Round Bar1010 Round Bar1018 Round Bar1045 Round Bar1117 Round Bar1141 Round Bar1144 Round Bar1144 A311 CL-B Round Bar1144 CENTURY Round Bar1215 Round Bar4130 Round Bar4140 Round Bar4140H Round Bar4145M Round Bar4330 Round Bar4330V Round Bar4340 Round Bar4340H Round Bar8620 Round Bar8620H Round Bar9310 Round Bar52100 Round BarA36 Round BarA193 Round BarA307 Round BarA588 Round BarETD-150 Round BarLF2 Round BarLF2/A105 Round BarMaraging 250 Round BarMaraging 300 Round BarMaraging 350 Round Bar