How to Get an Accurate Metal Stamping Quote: The 8 Things Your RFQ Must Answer

Short answer: an accurate metal stamping quote needs eight decisions locked before a die shop can price anything — material gauge and alloy, the tolerance list (which dimensions are actually critical), monthly versus annual volume, whether tooling is amortized or billed separately, finish priced with and without, the documentation class (none, FAI, PPAP), the delivery form (reel or loose), and the trade term (EXW, FOB or DDP). Everything else — lead time, die life, price breaks — falls out of those eight. A RFQ that answers them gets a real number in 24-48 hours; a RFQ that doesn't gets a range, and ranges are where stamping programs quietly go wrong.

This guide is written from the buyer side of quotes we have actually run — the 37 mm × 4 mm steel stamping at 500,000 pieces per month, the battery contact blades at 10K per year, the Cu-ETP busbar at 250,000 pieces per year with a die-ownership question attached. Each field below is a place where a missing answer cost somebody money or time, and each has a checklist you can paste into your next RFQ.

1. Gauge and Alloy: Write the Material, Then Verify It Exists

The single most common RFQ defect is a drawing that carries no material callout, or a callout that names a class instead of an alloy. "Steel" is not a specification: SPCC cold-rolled, SGCC hot-dip galvanized, SUS301 spring stainless and Q235 structural plate all stamp — but with different tonnage, different die clearance, different springback and different plating adhesion. On the coil-fed progressive line the practical working band is 0.05 mm to 3.0 mm strip; thick-gauge structural work lives on the 45-110 ton presses up to 3.0 mm. Below 0.3 mm you are in thin-gauge territory where burr ratio and punch protection dominate the die design — see the thin-gauge lead frame stamping capability page.

Alloy families matter for the same reason a buyer named "C72900 copper" — a cupronickel used for stamped electronic contacts — in an RFQ and asked a supplier to confirm capability: the answer is not "yes we stamp copper." It is which alloy, at what temper, with what conductivity and spring-force requirement. Phosphor bronze C5191, beryllium copper C17200 (verified to ASTM B194/B196 hardness classes), brass C26000 and ETP copper C11000 each have a price and a tooling behavior. If your assembly draws current and springs, write both the alloy and the temper on the drawing before anyone quotes.

2. Tolerances: Mark What Actually Matters

A drawing with every dimension boxed to ±0.01 mm is not a tight drawing; it is an expensive guess. High-speed progressive stamping holds ±0.005 mm positional accuracy on piloted features — holes and profiles positioned by the strip feed — while free-formed dimensions settle around ±0.025 mm (±0.001 in), and formed heavy-gauge angles typically hold ±0.05 mm. When a buyer boxed bend angles and cosmetic dimensions at press-brake tolerances on a part stamped at 300 strokes per minute, the die cost roughly doubled versus marking two functional holes critical and letting the rest float.

The fix is a tolerance list, not a tolerance field: identify the three to six dimensions that control fit, function or assembly, box those, and explicitly accept standard stamping tolerance on everything else. If you can't tell which features are critical, ask for a DFM pass before tooling — a competent stamping engineer can usually name your critical dimensions back to you better than your print does.

3. Volume: Annual Total, Monthly Run, and the Set Question

"10K per year" is ambiguous in a way that changes quotes by an order of magnitude. Is it 10,000 pieces per part number, or 10,000 sets of four part numbers — 40,000 pieces of tooling investment versus 10,000 pieces? A surgical-instrument battery contact blade inquiry taught us this the hard way: four contact blade numbers, annual volume 10K, and the whole quote hinges on whether that is one program of 40K pieces or four programs of 10K.

Quote-ready volume statements carry three numbers: annual total, typical monthly (or per-order) release, and expected lifespan or repeat cadence. A monthly figure of 500,000 pieces — one month of a six-million-a-year stamping program — prices the die differently from the same total released quarterly, because tooling amortization and coil changeovers follow the release pattern, not the calendar. Progressive dies become the obvious answer when annual volume crosses roughly 100,000 pieces per part geometry; below tens of thousands, ask about transfer tooling, simple dies or day-tool approaches before accepting a progressive-die quote.

4. Tooling: Separate, Amortized, or Owned and Shipped

Every high-volume RFQ eventually hits the money question: is tooling inside the unit price or a separate line? Both models work; one number always beats a range. The buyer who wrote "模具费用可以单独支付，请不要把模具开发费用包含在产品单价里面" (tooling paid separately, keep it out of the unit price) was protecting a real thing — the ability to see piece cost and tool cost independently and to walk away with a proven die. A supplier quoting a blended price can hide either number inside the other.

Three questions settle the structure: who owns the die after payment, where does it run, and what happens at end of life. If you own it and want it in your plant, that is a die export program: the tool is built, tried out and first-article-qualified on the supplier's presses, then released with the fixture package and try-out records. If you amortize, cap the amortization quantity in writing so a program that ends early doesn't leave you buying a half-paid die at unit price.

5. Finish: Price With and Without, and Name the Section

"Price and lead-time, with and without finish" — a short-run stamper's RFQ line that every supplier should love, because it forces both numbers out before the program locks. Plating and coating are where stamping quotes drift: reel-to-reel selective plating (gold 2-8 µm, tin, zinc or electroless nickel 10-20 µm) runs through managed partner lines under the stamping supplier's quality plan, and the cost depends on chemistry, thickness band, masking and whether precious metal lands on every contact or only where current moves.

Two fields prevent the drift: the drawing's plating section (chemistry, thickness, adhesion and corrosion test class) and the acceptance method (XRF on samples per lot, salt-spray to the named standard). If the plating section is blank, ask the supplier to propose the standard build and price both options — that is exactly what happens on a battery contact blade print that says "refer to plating section" and the section is empty.

6. Documentation: Pick Your Class Before You Need It

Documentation is a volume decision, not a size decision. A consumer bracket with an MTC and an FAI report costs almost nothing extra; the same bracket re-specced as an automotive part inherits IATF 16949:2016 controls, PPAP, SPC on critical features and lot traceability, and the quote should say so at the start, not after a failed qualification. The four common classes, cheapest to most demanding: no paperwork (commercial goods), MTC + FAI (material certificate and first-article against the drawing), PPAP with SPC (automotive, EV, regulated industrial), and aerospace/defense documentation packages (traceability plus process records, quoted per program). Ask for the class you'll actually audit against — buying PPAP for a garden hinge is waste, skipping it for a safety system is a re-build.

7. Delivery Form: Reels, Loose Pieces, and the Assembly Downstream

The cheapest field to forget: how parts leave the press. Terminals, contacts and lead frames stamped at up to 300 strokes per minute come off as strip, and if your line feeds them automatically, reel-to-reel with an agreed pitch, orientation and splicing protocol is part of the stamping price — not a packaging afterthought. If the parts go to a plating house or a manual assembly bench, loose piece changes both the die's cut-off station and the secondary handling. Decide this before the die is cut, because converting a reeled tool to loose-piece cutoff later is a tooling change order.

8. Trade Terms and Logistics: EXW, FOB, DDP and the Zip Code

Same parts, three different prices depending on where the supplier's responsibility ends. EXW Dongguan is the factory-direct baseline; FOB adds inland and port handling; DDP lands the parts at your dock with duties and freight inside the number — and DDP quotes need your postal code before they are honest, because a battery contact program quoted DDP to a wrong zone shipped a wrong number. If you are consolidating freight from multiple Chinese suppliers, ask your forwarder for a target warehouse and quote FOB to it; if you want the supplier to own the door-to-door risk, quote DDP and make the quote state duties, carrier class and lead-time basis.

The Paste-Ready RFQ Checklist

Field	Write this	Why it changes the quote
Material	Alloy + temper + gauge (e.g., C5191, 0.3 mm SPCC)	Tonnage, die clearance, plating adhesion
Tolerances	Boxed critical list, rest = standard stamping	Die cost, inspection method, price breaks
Volume	Annual total / monthly release / program life	Tooling choice and amortization math
Tooling	Separate or amortized; ownership; die export y/n	Front-end cash and walk-away rights
Finish	Plating section or "quote with & without"	Two honest prices instead of one blended
Documentation	None / MTC+FAI / PPAP / aerospace class	Quality system inheritance
Delivery form	Reel (pitch, orientation) or loose piece	Cut-off station and downstream handling
Trade term	EXW/FOB/DDP + zip or warehouse	Freight, duties, lead-time basis

What Happens After You Send It

A supplier working from a complete RFQ returns three things within a day or two: a DFM mark-up (where the geometry will fight the die), a tooling number with a lead time (typically 4-8 weeks for a production progressive die, samples 2-4 weeks after DFM approval), and a piece-price ladder keyed to your actual release volumes — not generic 1K/10K/100K rows. If any of the three is missing, the quote is a guess with your logo on it. For the underlying process, the progressive die tooling guide covers how station count and strip layout drive the die price, and the bracket spec-and-quote guide walks the same checklist through a structural part.

FAQ

How fast can a stamped part be quoted? With the eight fields above answered and a clean STEP file: 24-48 hours for a preliminary tooling and piece-price estimate from most competent shops, one week for a formal quote with the T&C set. Missing fields turn a quote into an estimate with an escape hatch.

Should tooling be included in unit price? Either is fine — pick deliberately. Separate tooling buys you walk-away ownership and honest piece cost; amortized tooling lowers front-end cash but must cap the amortization quantity in writing.

What is the minimum order quantity for progressive stamping? ISTAMPING's stated floor is 10,000 pieces per part number, but the economic floor is volume × die cost: below roughly 100,000 pieces per year per geometry, ask about simple dies or transfer tooling instead.

Can I move a die to another factory later? Yes — buy it outright and run a die-export transfer: try-out records, first-article reports and the checking-fixture package travel with the tool. Qualification on your presses after transfer is your program's work; the records are the bridge.