A foundry planning its melt around a fixed date is buying a place on the plant's melt plan rather than a box off a shelf. CoCrMo master alloy bar is cast to order in round sections from 8.0 mm to 200 mm, and the slot is dated from order confirmation, with the lot released and packed before the sea leg begins.

CoCrMo as a Charge Addition, and What It Is Charged Into

CoCrMo is a cast grade designation for a cobalt-chromium-molybdenum alloy, and it reaches a foundry as an addition to its own melt rather than as a finished part. The order fixes the composition and the impurity limits, and the cast is made to those figures.

In form the bar comes off the same cast route as the rest of the high temperature alloy bar line at this plant: vacuum melting, a composition check against the agreed grade, then bar casting into round section. Wear-facing and heat-exposed castings take the bar as an input, including turbocharger wheels and pump or valve bodies, and hardware for glass production.

Specifications

Key Strengths

• Cast to order against limits agreed before the melt.

• The slot carries a date tied to order confirmation.

• Cut to the ordered length before packing, so the bar is weighed in on arrival.

• Melting and cutting handled at one plant, which keeps the dates in one place.

• Documents prepared while the lot is still on the melt plan.

Technical Details

What Has to Be Fixed Before a Slot Is Booked

A slot goes onto the melt plan only against a specification that has stopped moving. The cast section and the quantity decide how much metal is melted and how long the cast occupies the plant, while the grade and the cut length are carried on the order. All of them have to be settled before a date can be given. That is why an offer comes back with the specification written on it and a cast date beside it rather than with a date alone.

What Happens Between Confirmation and Dispatch

Once the order is placed, the lot takes its turn. Melting and a composition check against the agreed grade come first, then bar casting and cutting, with the surface inspected and the lot packed before the export documents are drawn up. Nothing stands on a shelf in between, so the sequence runs the same way whether the lot is large or small, and the dates move only when the specification does.

Why the Cut Length Matters to the Dates

Cutting sits before packing in the sequence, so a length agreed when the order is placed costs nothing extra at the end of the window. A length left open until the bar has been cast adds a step after the cast, and that step falls inside the window rather than after it. Settling the length early is the simplest way to protect a date.

Holding the Dates on a Repeat

A repeat order does not restart the conversation. The grade and the cast section are already recorded, and the cut length with them, so the offer is built on the same figures and the lot goes straight onto the plan. Keeping one specification also lets a buyer set one delivery beside the next on identical terms, which is what a casting programme needs when the melt shop is working to a calendar.

What Moves a Cast Date

Two kinds of change behave differently. A change to the specification, whether that is the grade, the section, the cut length or the quantity, is a change to the cast itself and is quoted as a fresh date, because the slot has to be re-planned around it. A change to the destination port or to the freight terms sits after the window and does not move the cast. Knowing which is which saves a buyer from re-quoting work that has not changed.

Quality Assurance

The melt is checked against the grade agreed on the order, and the finished lot is checked again before it is released. Cracks and contamination are looked for on the surface of the bar before it is packed, and the structure is assessed for uniformity where the order asks for it. Release is what starts the packing and dispatch sequence, so the certificate for a lot is issued on the same route that ends with the case being closed.

References

The grade designation comes from the cast grade series applied in the Chinese standard system, and CoCrMo denotes a cobalt-chromium-molybdenum alloy. Composition and impurity limits are set against the grade agreed on the order, and the chemistry and structure of each cast are read against the mill test certificate issued for the heat. Background on cobalt and nickel-base additions is drawn from the ASM Specialty Handbook covering nickel and cobalt alloys and from Nickel Institute publications.

Packaging & Delivery

Rod bundles travel with protective wrapping inside export wooden cases, and every case carries the grade and the lot number for identification on arrival. Cutting to the ordered length is finished before the cases are closed, so the consignment leaves ready for the charge rather than for a saw. Production is scheduled 15-30 days from order confirmation, and freight is quoted on FOB, CFR or CIF terms against the destination named on the enquiry.

About DZX Alloy

Jiangsu DZX Technology Co., Ltd. has melted and processed alloys at its Changzhou, Jiangsu plant since 2002 and moves consignments to buyers in 60+ export countries under ISO 9001 and SGS audited systems. Cast grade lots for this line are booked against the plant's own melt plan, so the date a buyer is given comes from the shop that will cast the lot rather than from a warehouse note.

Give the grade, the section, the cut length and the quantity, and the offer comes back with a cast date against each line.

FAQ

Q: How far ahead should a cast slot be booked?
A: The lot is booked on a 15-30 day window from order confirmation, so an enquiry answered against a fixed melt date gives the plant the notice it needs to place the cast.

Q: What happens between order confirmation and dispatch?
A: Melting and a composition check come first, then casting and cutting, with the surface inspected and the lot packed before the documents are prepared. The sequence runs in that order for every lot.

Q: How is the cast date given?
A: Against the specification, not on its own. The offer states the specification it is priced on, with the date the melt plan can hold for those figures.

Q: Can the same dates be held for a repeat order?
A: The grade and the cut length already on file go straight onto the plan again, so a repeat does not have to be re-specified before a date is quoted.

Q: Does the sea leg count inside the production window?
A: No. The window covers the cast and the packing, and the sea leg is quoted separately against the destination port on the enquiry.

Q: Does the cut length affect the dispatch date?
A: A length agreed at the enquiry is cut before packing and costs no extra time. A length settled after the cast adds a step inside the window.

Q: Can the cut length be changed after a slot is booked?
A: It is a change to the cast order, so the slot is re-planned and a fresh date is quoted rather than the original one being carried forward.

Q: What if the material is needed earlier than the window?
A: The earliest date is the one the melt plan can hold, since the lot is cast rather than taken from a shelf. Placing the enquiry early is what moves that date forward.

Q: Does a larger quantity move the date?
A: Quantity is fixed when the slot is booked because it sets the size of the melt. A later increase is quoted as its own lot with its own date.

Q: Which documents are ready when the lot ships?
A: The mill test certificate for the heat, the packing list carrying the case numbers, the commercial invoice and the bill of lading.