Equipment Series
Metso Cone Crushers
METSO · Part Details
Arm Guard
Arm Guard / Arm Liner
Identify parts for Metso cone crushers, check models and drawing numbers, confirm materials and processes, and submit an inquiry.
Equipment, Models and Drawing References
Identify the installed machine model and key dimensions, then check the part number, drawing number, drawing revision and physical interfaces.
Models and Key Dimensions
Metso HP series (HP100-HP800), GP series (GP100-GP550), and MP series (MP800-MP1000)
Drawing Number / Part Number
See the OEM part number table below
Provide the equipment nameplate, complete model and existing part number so that the installation position and drawings can be checked.
Drawing Revision
Confirm dimensions by measuring the sample or using the customer drawing. Cross-check the drawing revision against the model on the equipment nameplate.
Materials and Processes
Select the material grade and heat treatment for the operating conditions, processed material and equipment specifications. The options below are commonly used; confirm the final grade against the drawing and technical agreement.
High-Manganese Steel Mn13Cr2
Solution-treated, water-quenched high-manganese wear steel; the degree of work hardening depends on impact loading and actual operating conditions.
High-Manganese Steel Mn18Cr2
A high-manganese steel option; compare it with Mn13Cr2 using impact severity, material abrasiveness and actual wear records.
Hardox 400 Wear-Resistant Steel Plate
For low-to-moderate impact and high sliding wear; verify hardness against the specific grade, thickness and material certificate.
Metso XT710
Metso's proprietary manganese alloy uses a tailored carbon content and alloy composition to balance toughness and wear resistance.
Wear and Replacement Criteria
Common wear patterns and maintenance guidance are outlined below. Determine replacement intervals from operating conditions, processed material and equipment performance data.
Common Wear Patterns
- Material impact causes surface dents and plastic deformation.
- Sliding material causes grooves and localized thinning.
- Progressive wear exposes the metal structure of the arm; replace the liner before structural damage occurs.
- Wear enlarges the mounting bolt holes and loosens the fastening.
Replacement Criteria
Assess replacement against the arm guard remaining-thickness limit in the drawing. Replace if through-cracks, extensive spalling or bolt hole wear causing fastening failure occurs.
Materials and Processes
Materials, heat treatment, composite construction and inspection requirements depend on the specific drawing, operating conditions and technical review.
Material Grade / Substrate
Mn13Cr2 and Mn18Cr2 high-manganese steels, Hardox 400 wear plate, and other specified materials
Heat Treatment Condition
Solution heat treatment with water quenching. Final hardness and microstructure must meet the drawing and agreed technical specification.
Composite / Hardfacing Requirements
Weld Hardox wear plate using an approved procedure for the grade and thickness. Select consumables, preheat, interpass temperature and repair limits in accordance with the manufacturer's recommendations and the drawing.
Dimensions and Inspection
Manufacture to drawings produced from part measurements or supplied by the customer. Critical mating surface tolerances follow OEM requirements. Use UT/MT inspection to assess castings for shrinkage porosity and cracks against the agreed acceptance criteria.
Parts with the same name may not be interchangeable because of differences in machine model, drawing revision, mounting interface or material specification. Use the complete model, serial number, drawing number and drawing before manufacture.