From hot upset to ±0.025 mm post machining. One accountable owner from drawing to your US dock. Zero Section 301 tariffs on our China Plus One programs.
If you have ever sourced forgings from anywhere in the world, you know the routine. Email at 9 in the morning. No reply. Email again at 4. Maybe an answer Tuesday. We built VIA INDIGOS so the fifth email never lands. Because one missed handoff on a forging program can cost you three weeks of production line downtime.
If you have ever sourced forgings from anywhere in the world, you know the routine. Most buyers spend their week chasing updates instead of doing their real work. We built VIA INDIGOS to give that time back. Most forging programs need CNC machining, heat treatment, and surface finishing to get to your dock, and we run the whole chain under one owner. 33+ forging partner facilities across 22+ Indian cities, part of a 470+ facility audited partner network. Combined forging network capacity of 2,000 tonnes per month. One owner on your program from drawing intake through US dock delivery. Whether your monthly volume is 200 pieces or 20,000, we set up the program the same way.
I walk the press floor before a single PO is placed. We check press tonnage rating against the part footprint, billet preparation, induction heating uniformity, and the lab that will run your spectro analysis and mechanical tests. We pick partners who run heat treatment and CNC secondary operations under their own roof, on their own QA team, on their own clock. One roof, one floor, one accountable team for the full forging chain. DFM happens before a die is cut. T0, T1, and T2 validation gates come with photographic evidence, dimensional data, grain flow inspection, and a written verdict from our quality lead. Boots on the ground, every step of the way.
My team runs weekly checks on die wear, shot count, and heat treatment cycle compliance. We track SPC on critical dimensions, hardness traverse data on every heat treated lot, and lot to lot consistency on critical fatigue zones. We send you a status report every Friday that covers WIP, NDT results, tooling health, and shipping milestones. Container loading photos reach your inbox before the seal goes on. Every lot carries a traceability ID from billet to your receiving dock. Nothing ships until the dimensional report and the NDT report both show green. We do not wait for you to ask. We report because that is how a forging program should run.
Most contract manufacturers worldwide drop the ball at the handoff between two teams. We hold every one. Ten real stages, drawing to your dock. No sub-step skipped, no handoff left to chance.
A forging is not a casting with extra steps. The metal grain is aligned, not poured. The microstructure is verified, not assumed. Three controls separate a forging program that survives the field from one that ships the field a warranty claim.
Heat plus pressure aligns the metal grain along the load path. Cast metal has random grain. We verify alignment on first article using macro-etch per ASTM E381 because a forged knuckle that takes three times the fatigue cycles of a cast one is not a marketing claim, it is what keeps the part in the field for 250,000 miles.
Quench and temper. Normalize. Anneal. Case harden. Each cycle changes the steel inside, not just outside. We sign the cycle with the lab thermocouple log and a hardness traverse on the critical zone. Because a forging that left the press correct can leave the heat treat oven wrong, and the part will not tell you which one happened until it fails.
T0 first samples. T1 dimensional. T2 sign off. Each gate carries a checklist, photos of the cavity, and the shot sample side by side with the print. Because a die that runs without a gate review is a die that fails at shot 4,000, and we would rather catch it on the bench than on your line. NDT, MPI, and dimensional reports run on every production lot before it ships.
Closed die, open die, drop hammer, hot upset, and cold forging all run through the same VIA INDIGOS playbook. One owner from drawing to dock. One status update every Friday. One India network of 33 plus audited partner facilities behind every program.
The workhorse for steering knuckles, crankshafts, con rods, axle beams. Net shape with consistent grain flow along the load path. Tolerances from plus minus 0.4 mm as forged down to plus minus 0.025 mm post machining.
For shafts, blocks, rolls, and rings where the part is too big or the volume too low for closed die. Long lengths and heavy sections. Verified grain orientation through controlled draw and upset cycles.
Steam, air, or counterblow drop hammers for parts where impact energy and rapid deformation deliver better die fill on intricate geometries. Strong fit for hand tools, cutlery blanks, and aerospace fittings.
Headers, flange ends, valve stems, and bolt blanks. Localised heat and a horizontal forge upset the bar end into the die cavity. Material savings versus turning from bar stock are typically 30 to 50 percent.
Below recrystallisation temperature for tight tolerance and fine surface finish straight off the press. Common for fasteners, pinions, bearing rings, and hardware. Strain hardening adds strength without heat treatment for many alloys.
Three gates, three sign offs, photo evidence at every step. We do not move a die forward unless the gate before it is closed. A die that runs without a gate review is a die that fails at shot 4000, and we would rather catch it on the bench than on your line.
The die is machined, polished, and inspected on the bench. Cavity geometry compared back to the print. Draft angles, fillet radii, and parting line alignment all signed off before any heat touches the steel.
The first hot shot off the die. Full dimensional report on every callout. Macro etch on a sectioned sample to verify grain flow. Hardness traverse on critical zones. We send you the report before the next shot fires.
PPAP Level 3 package complete. PSW signed by the buyer. Capability studies on critical features above Cpk 1.67. Lot traceability live. Production releases only after the buyer has the full PPAP package in hand.
A forging program that runs across two countries, three suppliers, and a dozen handoffs is going to break unless someone owns every step. Below is what your program looks like under one VIA INDIGOS owner, end to end.
If a metric does not have an owner, a target, and a data source, it is not a metric. Below is the scoreboard we run on every forging program, refreshed weekly, surfaced in your Friday status email.
Upload your drawings. We review, run DFM, and return a full landed cost breakdown with tooling timeline and PPAP scope. You get one contact from intake to ship.
Tell us three things and we recommend the right forging process for your part. Closed die, open die, drop hammer, hot upset, or cold forging. Engineered for your geometry, your volume, and your tolerance.
Most India sourcing is run from a laptop in Cincinnati. Ours is not. Our team is physically present at partner facilities for tooling trials, T1 first samples, heat treat sign offs, and production launches. When something slips, we see it before you do. When quality holds, we have the photo evidence to prove it.
22+ Indian manufacturing cities. 33+ qualified forging partner facilities. Real people on the floor making sure your drawing becomes a part that passes PPAP the first time.
22+ cities. 33+ audited forging partners across closed die, open die, drop hammer, hot upset, and cold forging. Hover any marker to see partner count and what runs there.
22+ cities · 33+ forging partners · 2,000 tonnes monthly forging capacity
Every drawing carries a tolerance. Every tolerance carries a process. Below is what each forging process can hold as forged, and what we can deliver after a finishing pass. Numbers are typical for VIA INDIGOS programs and assume standard ASTM A788 carbon and alloy steels.
| Forging process | Typical materials | As forged tolerance | Post machining tolerance | Reference standard |
|---|---|---|---|---|
| Closed die | 4140, 4340, 1045, 8620, SCM440 | ±0.4 mm | ±0.025 mm | DIN 7526 grade E |
| Open die | 4140, 4340, A105, 1045, alloy steel rounds and blocks | ±2.5 mm | ±0.05 mm | ASTM A788 standard |
| Drop hammer | 1045, 4140, 8620, brass, copper | ±0.6 mm | ±0.025 mm | DIN 7526 grade F |
| Hot upset | 4140, 4340, A105, alloy bar stock | ±0.3 mm | ±0.025 mm | DIN 7526 grade E |
| Cold forging | 1018, 1020, brass, aluminum 6061, stainless 304 | ±0.05 mm | ±0.025 mm | ISO 286 IT8 |
Tighter tolerances available on request. Section size, alloy hardenability, and heat treatment cycle all affect achievable tolerance. We confirm callouts during DFM review before quote.
Closed die vs open die vs drop hammer vs hot upset vs cold forging. Five honest comparisons, not marketing claims. Use this to short list before you send the drawing.
Net shape, repeatable tolerance, recurring volume.
Shafts, rings, blocks, low volume, large parts.
Complex geometry, mid volume, decorative grade.
Bar end forming, fasteners, valve stems, axles.
High volume, tight tolerance, no heat treat needed.
Not sure which fits? Use the process picker above and we recommend the right process for your geometry, volume, and tolerance in 30 seconds. Or send the drawing and we quote both options where it makes sense.
Every industry has its own certs, its own regulatory pressure, its own drawing conventions. The handoff discipline stays the same. What changes is the technical documentation that moves with the part.
When forging is the answer and when it is overkill. Grain flow, fatigue performance, tooling economics, and the volumes where each process actually wins.
Read the post →The two workhorse alloys for forged automotive and industrial components. Which one earns the cost premium, which one is overspecified, and what your heat treat partner actually needs to know before quoting.
Read the post →IATF 16949, ISO 9001, AS9100D. What the certifications mean, what they actually prove, and what laser focus on compliance buys your forging program when something goes wrong.
Read the post →Plain English answers, written for procurement and engineering teams who want a real number, not a brochure. Last reviewed by Mandeep Singh in May 2026.
Standard closed die tooling for a part under 10 kg runs 8 to 12 weeks from PO to T0 first sample, depending on cavity complexity, alloy, and heat treat package. Larger or multi-impression dies push to 14 to 16 weeks. Open die rarely needs custom tooling, so a first article can land in 3 to 5 weeks.
If your competitor is quoting you 6 weeks tooling, ask whether that includes T1 dimensional, T2 PPAP, and the dimensional report. It usually does not.
Closed die wins for parts under 80 kg with recurring volume above 1,000 pieces a year and net shape requirements. Tighter tolerance, less machining stock, faster cycle. Higher tooling cost paid back over volume.
Open die wins for shafts, rings, and blocks above 80 kg, low volume runs under 500 pieces, and parts where you do not want to invest in dies. Looser as forged tolerance, more machining stock to remove, slower cycle, but no tooling NRE.
Use the picker above and we will recommend in 30 seconds.
PPAP Level 3 means we send the buyer the full Production Part Approval Process package: signed PSW, design records, dimensional report on every callout, material test reports, capability studies with Cpk on critical features, MSA on the inspection method, control plan, PFMEA, and the appearance approval report when surface finish is a callout.
Production does not release until the buyer has the package in hand and the PSW is signed. That is the discipline. No PPAP, no shipping.
No. Section 301 tariffs are levied on goods of Chinese origin. Forgings of Indian origin enter the United States under standard MFN duty rates, typically 0 to 5 percent on raw forgings, sometimes higher on specific HS codes for finished assemblies.
If your current China supplier is passing 25 percent Section 301 to your COGS, an India backup is the cleanest move on the table. We help with the HS classification, certificate of origin, and broker handoff.
For closed die programs, our partners typically run 200 piece minimums per release, with annual volume above 1,000 pieces to justify tooling. Below that, drop hammer or open die makes more sense.
For open die work and aftermarket programs, we run as low as 50 pieces per lot. Tell us the part and we tell you the floor.
Macro etch per ASTM E381 on a sectioned first article. Hot acid etches reveal the deformation pattern. We photograph the etched section side by side with the print, mark the grain alignment direction, and confirm it follows the load path.
For high cycle fatigue applications like steering knuckles or axle beams, we add intergranular grain size verification per ASTM E112. Reports go in the PPAP package.
4140 is the workhorse alloy steel. Quench and temper to 28 to 32 HRC for general structural use. Surface induction harden when wear resistance matters. Section sizes up to 75 mm hardenable through.
4340 adds nickel for deeper hardenability and better impact toughness. Quench and temper to 35 to 42 HRC. Section sizes up to 150 mm hardenable through. Use it when section is heavy or impact loading is high. Costs about 35 to 50 percent more than 4140.
We sign the heat treat cycle with the lab thermocouple log and a hardness traverse on the critical zone. No verbal sign offs.
T0. Die machined, polished, inspected on the bench. 3D scan vs CAD print. Draft and fillet check. Photos archived. No heat at this gate.
T1. First hot shot off the die. Full dimensional report. Macro etch grain flow. Hardness traverse. Buyer engineering call before T2.
T2. Production sign off. PPAP Level 3 package complete. PSW signed by the buyer. Cpk above 1.67 on critical features. MSA on the inspection method. Lot traceability ID assigned. Production releases only after the buyer has the full package.
Default is FOB Nhava Sheva or CIF US West Coast. We offer DDP on request with a logistics markup that we disclose up front. Inbound preferences are Los Angeles, Long Beach, New York, Newark, and Chicago, with alternates only when they improve lead time or cost.
For programs with US warehouse pull, we hold inventory and ship JIT to your dock. Storage and handling fees on a published rate card.
You do. Tooling ownership transfers to the buyer on full payment, in writing, with a tooling passport that documents die set ID, shot count, refurb history, and storage location. We hold the die at our partner facility on a bailment basis, available for inspection or transfer at any time.
If you want to move programs in 18 months, the die is yours. We do not lock dies to facilities or hold them hostage.
Send us your drawings. You get a full landed cost breakdown, a tooling timeline, the recommended forging process, and a PPAP scope. One contact from intake to ship. No commitment required.
30 minutes · no obligation · bring your drawings
Three working templates we use on every forging program. PPAP checklist. Tooling Gantt template. Supplier audit checklist. Yours to keep, even if we never work together.
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