QuotedPartCost guides · Updated 2026-10-30
How much more does Inconel cost to machine than stainless?
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On the milled block, Inconel 718 costs $547.78 more per part than 316 at one, $246.10 more at 10, and $260.44 more at 100 pieces ($1145.05 for Inconel versus $597.27 for 316 at one). The gap comes from Inconel’s high stock price and much slower cutting, before any special tooling or inspection.
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The Inconel 718 versus 316 stainless example part
The reference block has a pocket and six holes, so it includes both metal removal and drilling. Inconel’s low removal factor stretches the cycle and raises tool-risk exposure. A production Inconel job may also need slower engagement, special tooling, coolant control or a post-machining inspection plan.
How the quantity break works
The material premium is visible even before the first chip. On a one-off, setup remains large, but the stock can still be a meaningful part of the line. At 100 pieces, repeat cycle and alloy price dominate. 625, 718 and austenitic stainless should not be swapped by a flat percentage.
| Qty | Setup min (lot) | Cycle min (part) | Cost / part | Quoted / part | Lot price | Lead days |
|---|---|---|---|---|---|---|
| 1 | 191.0 | 26.7 | $459.44 | $597.27 | $597.27 | 11 |
| 10 | 191.0 | 26.7 | $111.45 | $144.89 | $1448.90 | 12 |
| 100 | 191.0 | 26.7 | $74.05 | $96.27 | $9627.00 | 17 |
What the material or process changes
Temperature, corrosion, weldability and strength requirements decide whether Inconel is necessary. Ask for condition, heat treatment, traceability and any edge or surface requirement. Heat treat and outside inspection are not included unless they are named in the table assumptions.
How to turn this into a firm quote
A useful quote states what would change the number: a smaller roughing allowance, a 5-axis route, a ceramic tool, a different condition or a buyer-supplied billet. Keep those as explicit options rather than hiding them in a risk premium.
Questions to settle before release
Confirm temperature, corrosion, strength, heat treatment, certification and tool-life expectations before offering stainless as an Inconel substitute. Ask whether the customer permits a slower cycle or a different surface finish. Inconel jobs often need a prove-out and an inspection plan. The paired tables explain cost; the engineering specification decides whether either alloy is acceptable.
For this inconel vs stainless machining cost 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 Inconel 718 CNC milling example part
- • Material: Inconel 718; the US catalog stores its small-lot price and machinability factor.
- • Process: CNC milling; 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 4 × 3 × 1 in milled block; no finish or outside process.
- • 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 | 191.0 | 63.9 | $880.81 | $1145.05 | $1145.05 | 11 |
| 10 | 191.0 | 63.9 | $300.76 | $390.99 | $3909.90 | 12 |
| 100 | 191.0 | 63.9 | $274.39 | $356.71 | $35671.00 | 25 |
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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