The Mn18Cr2 designation alone does not establish dimensional fit or service life. A useful enquiry identifies the requested component and gives the supplier enough information to review the proposed material against the application. Treat a material change and replacement-part identification as separate points to confirm. This guide prepares that discussion; it does not prescribe a grade or certify a casting.
Identify the bowl liner and installed arrangement
Record the crusher make, model and machine version, the chamber designation and the complete public reference number, including its suffix. Identify the bowl liner separately from the mantle. Add the required quantity and unit for each component, and state whether accessories are requested. If a number or chamber detail is uncertain, mark it as unknown and request confirmation against the installed arrangement before agreeing the replacement.
Describe the operating conditions and wear history
Provide the feed material, available feed-size information, operating setting and position in the crushing circuit. Include the current material grade if known, the service period and clear photographs of the worn surfaces. Explain what the maintenance team wants to review, such as uneven wear or a replacement interval that no longer suits the operation. Observations and photographs support a technical review; they do not establish the cause of damage on their own.
Compare the material specification on the quotation
Ask the supplier to state the proposed grade and, where specified, the applicable material standard and revision. Keep the original designation in the enquiry rather than substituting a similar grade name. Separate the requested material from what the supplier has confirmed. Agree which composition, process or inspection information will be provided for this order, the acceptance basis and any additional charges. Do not treat a general material table as the specification for the supplied part.
Read material records with their limits in view
Check that the report identifies the material being tested and states the relevant result and basis of comparison. If the report applies to a heat or batch, ask how that record is linked to the delivered part. Keep the original supplier record in the private order file.
Do not decide that a liner will last longer from a manganese figure alone. Material selection and service conditions need a separate technical review. A chemistry result does not establish dimensional fit, and an example report does not certify another shipment.
Use our crusher parts quality-document checklist to agree the records needed for the order. Document availability and any inspection charges must be confirmed in the quotation.
Send the details behind the price request
For each line, include the machine version, cavity designation, complete public reference if available, requested material and quantity. Ask the supplier to itemize mantle, bowl liner and accessories. State the destination and commercial delivery term, then ask what inspection evidence, packing and delivery commitment are included. There is no useful universal price per liner: geometry, material, supply scope and freight arrangement must be known for the order at hand.
Send your replacement-parts list to GUBT
Chengdu GUBT Industry Co., Ltd. supplies aftermarket replacement parts. Brand and model names identify equipment applications and do not imply affiliation with the original equipment manufacturer. Supply scope, material and inspection requirements are confirmed for the individual quotation.
Material families used for crusher wear parts
Manganese steels are the usual starting point for compression crushing parts — mantles, bowl liners and jaw plates. Their surface work-hardens under repeated impact while the core stays tough. Lower grades suit gentler duties; grades with more manganese, and chromium-bearing variants such as the Mn18Cr2 type discussed on this page, are considered where impact and abrasion are both high. The key point is matching: the grade only develops its working surface if the application gives it enough impact.
High-chrome iron resists abrasion strongly and is used mainly in impact crushing positions with clean, controlled feed. It is less tolerant of heavy impact and uncrushable material, so feed control matters as much as the material name. Martensitic steels sit between the two, balancing hardness with toughness for duties that are too abrasive for a plain manganese choice but too impact-heavy for chrome. Ceramic-insert options exist for some abrasive positions and need the same duty check.
Process matters as much as the grade name
Two castings with the same grade name can behave differently. Casting soundness, heat treatment, and machining of mating and fixing surfaces affect how a liner seats, how evenly load is carried, and how the wear pattern develops. When you compare offers, ask what is controlled for your order: chemistry and heat treatment for the agreed grade, machining scope, and dimensional inspection of the profile and fixing points. Keep that record with the part number so a reorder repeats the same specification.
What drives service life
Wear life is a system result: feed hardness and abrasiveness, feed size and grading, chamber profile and closed-side setting, feed distribution, and whether mating parts were renewed together. Changing only the grade while keeping a worn mating part or an uneven feed can hide the benefit of the new material. Record operating hours or tonnage, the setting, and the remaining thickness at change-out; that history is what turns the next material decision from a guess into a comparison.
Selection, delivery and quantity — a short checklist
Before ordering, confirm: part and position; equipment and chamber; current grade and its measured life; feed description; requested grade or the duty for the supplier to review; quantity (trial piece, working set or stock); inspection scope; packing and delivery destination. Lead time and any minimum quantity follow the part size, pattern availability and machining route, so have them confirmed for the actual order rather than relying on a general figure.
GUBT supplies independent aftermarket replacement parts. Any reference numbers or equipment names shared for identification are used only to check compatibility. They do not imply affiliation with, or endorsement by, the original equipment manufacturer.
Frequently asked questions
Is a higher manganese grade always better for crusher wear parts?
No. Manganese steel work-hardens under impact, so it needs enough impact to develop its hard surface. In a low-impact or mainly abrasive position, a higher grade may not work-harden fully and can wear faster than a better-matched grade. Match the grade to feed hardness, abrasion and impact, and review each crusher position separately.
How do I choose between manganese, chrome and martensitic materials?
Start with the duty: manganese steels are generally chosen for high-impact compression parts such as mantles, bowl liners and jaw plates; high-chrome iron suits clean, highly abrasive impact duties where impact is controlled; martensitic steel sits between the two. Then confirm with the supplier against your feed, feed size and any risk of uncrushable material.
What information helps a supplier recommend a material change?
Give the part and position, equipment model and chamber, feed material and size, operating setting, the life and wear pattern of the current part, and photos of the wear. A worn-part photo showing uneven wear, cracking or metal flow tells the supplier more than a request to simply ‘upgrade the grade’.
Which tolerances and checks should I ask about?
Ask which mating dimensions, fixing positions and profile points will be inspected, and how the results will be recorded for your order. Agree the inspection scope before production, then compare markings and key dimensions on arrival before the parts are fitted.
Can I order a single liner to test a new material?
A single-part or single-set trial is often the sensible way to test a material change, but availability and minimum quantity depend on the part, pattern and machining route. State that it is a trial, record the duty carefully, and agree in advance how wear will be compared with the previous part.
