K403 Cast Master Alloy Bar Ordered as a Trial Lot
K403 master alloy bar, vacuum melted and cast into round sections from 8.0 mm to 200 mm, sized for a first trial lot and cut to the charging length in use at the foundry.
0K403 master alloy bar, vacuum melted and cast into round sections from 8.0 mm to 200 mm, sized for a first trial lot and cut to the charging length in use at the foundry.
K403 master alloy bar is cast to order in round sections from 8.0 mm to 200 mm, and the first lot a foundry buys does not have to match the size of the production run it is planned for. Composition and impurity limits are fixed on the order, one grade per cast, and the lot is released with a mill test certificate for its heat.
K403 is a designation from the cast grade series applied to high-temperature alloys in the Chinese standard system. A foundry buys the bar as a charge addition rather than as a finished part, so the specification exchanged before the cast covers what the addition has to carry into the heat and which elements have to be held low.
In form the bar comes off the same cast route as the rest of the high temperature alloy bar range made at this plant: vacuum melting and a composition check before bar casting into round section. Diameter and cut length are taken from the order, and a value that is not on the order is not substituted at the furnace.
A first lot can be cast at the size a foundry needs before a production run is placed.
Composition checked against the agreed grade before the bar is packed.
Bar cut to the length the foundry charges with.
A first cast and a recurring lot follow one route and one release check.
Lot records held so a later production order can be matched to the trial it followed.
The size of a first lot follows from the crucible rather than from a catalogue minimum. A foundry evaluating a grade needs enough bar to charge the heats used for the evaluation, and not much more while the grade is unproven. Diameter and cut length are read together with the quantity for that reason: a heavy section means fewer pieces for the same weight, and a length matched to the charging bucket keeps the pieces usable without a second operation on site.
A trial lot is not a separate process. It goes onto the same melt plan as any other cast. Vacuum melting and a composition check against the agreed grade come first, then casting into round section and cutting to the ordered length, with the surface inspected before packing. What makes it a trial is the size of the order and the purpose it serves, not a shortened route or a lighter release check.
Qualification happens at the customer's furnace. The bar is charged with the rest of the charge, the resulting heat is analysed, and the analysis is compared with the composition the grade is expected to produce. Because the certificate issued with the lot states the composition of the material supplied, any difference found in the customer's own analysis can be traced to a documented input rather than to an assumption about what was delivered.
Once a grade has been charged and accepted, the items settled for the trial stay settled. The diameter and the length are already on file with the lot record, so a production order repeats them without re-specification, and the marking and the document set follow the same pattern at a larger quantity.
A first lot is booked the same way as a production lot. The offer is settled before the cast: grade and diameter fix the material and the section, cut length follows the charging practice, and the destination port sets the freight. A slot cannot be reserved against a moving specification, which is why those items are agreed first. Trial quantities are cast ahead of the production run they are intended to support, so a foundry can charge and analyse before committing to the volume it will need if the grade is accepted. The sea leg sits outside the production period.
Composition is checked against the grade agreed on the order at the melt and again on the finished lot before release. The surface of the bar is inspected for cracks and contamination, and structure uniformity is assessed where the order asks for it. A first cast is released on the same check as a recurring lot, so the certificate that arrives with a trial can be read in the same way as one from a long-running supply.
K403 is drawn from the cast grade series used for high-temperature alloys in the Chinese standard system. Composition and impurity limits are verified against the grade agreed on the order, and lot chemistry and structure are checked against the mill test certificate and in-house inspection records. Background on nickel-base additions and elevated-temperature service is taken from the ASM Specialty Handbook on nickel and cobalt alloys and from Nickel Institute technical publications.
Bar travels in rod bundles with protective wrapping inside export wooden cases marked with the grade and the lot number. A first lot is packed to the same specification as a production shipment, so the material reaches the foundry ready to be charged. Production is scheduled 15-30 days from order confirmation, a trial is cast ahead of the run it supports, and freight is quoted on FOB, CFR or CIF terms against the destination named on the enquiry.
ISO 9001 and SGS audits cover the melting and casting route at the Changzhou, Jiangsu plant of Jiangsu DZX Technology Co., Ltd., which has supplied 1,000+ products to buyers in 60+ export countries since 2002. A first cast for a new grade is handled by the same melt shop and released on the same check as the recurring lots the plant ships every month, and each lot is recorded against the heat that produced it.
Name the grade and the quantity planned for a first cast, and a quotation with a scheduling date follows.
Q: Is K403 kept in stock?
A: No. The grade is cast to order against the composition agreed for the lot, which is why a first cast is scheduled rather than drawn from stock.
Q: Can a first lot be smaller than a production run?
A: Yes. The first lot is sized to the heats used for evaluation rather than to the volume a production run will need, and the quantity is agreed with the grade when the order is placed.
Q: What has to be settled before a first lot is booked?
A: The grade, the diameter, the cut length, the quantity and the destination port, since a slot is held against a fixed specification.
Q: Does a trial lot run on a lighter route than a production lot?
A: No. It goes onto the same melt plan and is released on the same composition check, with the surface inspected before packing.
Q: How is the grade qualified at the foundry?
A: The bar is charged with the rest of the charge and the resulting heat is analysed against the composition the grade is expected to produce, with the certificate issued for the lot documenting the input.
Q: Which documents arrive with a first lot?
A: A mill test certificate stating the composition of the heat, a packing list and the commercial documents prepared for the destination.
Q: How is a first lot packed?
A: In rod bundles with protective wrapping inside an export wooden case marked with the grade and the lot number, to the same specification used for a production shipment.
Q: How long does a first lot take to schedule?
A: Trial quantities are cast ahead of the production run they are intended to support, and the export window is 15-30 days from order confirmation.
Q: Does a first lot commit the buyer to a production order?
A: No. A trial can be ordered and evaluated on its own, and a production order is placed separately if the grade is accepted.
Q: What changes between the first cast and a production order?
A: The quantity and the packing volume. Everything else, from the grade to the length, stays as it was agreed for the trial.
E-mail: dzx@dlx-alloy.com
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Tel: 0086-19906119641
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