QuotedPartCost guides · Updated 2026-10-30
What does 4140 steel cost per pound?
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4140 pre-hard steel is $8.42 per pound for a small lot in this catalog; the turned pin quotes at $313.57 for one, $45.02 each at 10, and $16.56 each at 100. Density, slow cutting, setup and inspection—not the bar price alone—drive the finished number. Record diameter, cut length and condition before release. Keep the supplier date beside the quantity break so a later bar-price change is easy to audit.
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The 4140 pre-hard steel example part
The example part is a two-inch pin from 1.5-inch round bar, with one drilled end and one relief groove. Purchased stock weighs more than the finished pin, and the shop may have to buy a cut piece or a full bar. The material assumption says which case the table uses; it is not a scrap-credit promise.
How the quantity break works
4140 is tougher to cut than 1018 and more expensive than mild steel. The machinability factor controls the illustrative cycle, while the pound price controls the stock line. Tool life, coolant and a post-heat-treat grind can matter more than a dollar per pound on a tight production job.
What the material or process changes
At ten pieces, the fixed lathe setup is divided across the lot. At one hundred, the volume material curve and repeat cycle dominate. If your supplier sells a different diameter or condition, replace the stock price and rerun rather than applying a generic market multiplier.
How to turn this into a firm quote
Quote hardness, condition, saw cut, certification and any treatment separately. The buyer can then choose pre-hard stock or an annealed route with heat treat while seeing exactly which line changed.
Questions to settle before release
Capture the supplier’s diameter, cut length, condition, heat number and freight terms with the 4140 price. The same pound rate can produce a different blank cost when the saw charges a minimum or the bar is sold by full length. Ask whether the shop credits the drop. Those details keep a price-per-pound page useful for a real quote instead of a disconnected commodity number.
For this 4140 steel price per pound estimate, for a firm release, have the programmer and machinist read the assumptions together. They can spot an inaccessible feature, an extra load, a tool change or an inspection step before the number reaches the buyer. Treat the computed table as a shared starting point: the shop’s measured method and the customer’s print decide which edits belong in the final route.
Pricing engine output for the stated Steel 4140 pre-hard CNC turning example part
- • Material: Steel 4140 pre-hard; the US catalog stores its small-lot price and machinability factor.
- • Process: CNC turning; setup, machine time, deburring and inspection are generated from the example-part geometry.
- • Markup: 30% default US catalog markup; quantities are 1, 10, 100.
- • Fictional 2 in turned part from 1.5 in bar; one drilled end hole and one groove.
- • No outside finish, tax, freight, or customer-specific rate is included.
- • These are computed examples, not supplier quotes or market averages.
| Qty | Setup min (lot) | Cycle min (part) | Cost / part | Quoted / part | Lot price | Lead days |
|---|---|---|---|---|---|---|
| 1 | 123.3 | 4.4 | $241.21 | $313.57 | $313.57 | 9 |
| 10 | 123.3 | 4.4 | $34.63 | $45.02 | $450.20 | 9 |
| 100 | 123.3 | 4.4 | $12.74 | $16.56 | $1656.00 | 10 |
Sources and limits
Claims are dated where they can change. Product calculations are examples from the stated inputs, not a promise about a customer's quote. Competitor wording is attributed to the source shown.
- The figures are computed from the stated example part and US catalog assumptions.
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