Metso C110 Fixed Jaw Engineering: Mn18Cr2 Metallurgy and Precision Machining for Static Crushing Surfaces
- Material: High Manganese Steel (Mn18Cr2)
- Surface Hardness: HB220-250 (work-hardens to 550+ HB)
- Groove Dimensions: 12-16mm depth / 35-40mm pitch
- Impact Rating: 150J/cm² at -20°C
- Thermal Stability: -30°C to 380°C operating range
库存 182 件
PRODUCT
Description
Metso C110 Fixed Jaw Plate (MM0224994): Metallurgical Analysis of Mn18Cr2 Static Crushing Surfaces
In the kinematics of the Metso C110 jaw crusher, the fixed jaw plate (Part Number: MM0224994) functions as the static anvil against which the kinetic energy of the pitman is directed. Weighing precisely 1788.29 kg, this component does not merely resist abrasion; it must withstand high-cycle compressive fatigue loads often exceeding 350 MPa while maintaining structural rigidity to protect the front frame assembly. Unlike the movable jaw which benefits from eccentric motion, the fixed jaw endures the full, concentrated force of the “nipping” action, making its metallurgical consistency and dimensional flatness critical for preventing catastrophic frame wash-out.
This technical dossier provides an engineering-level analysis of this specific casting. We will bypass general marketing rhetoric to examine the strain-hardening mechanics of the Mn18Cr2 alloy, the tribological advantages of the wave-groove profile, and the strict machining tolerances required to ensure this 1.7-ton casting integrates seamlessly with the C110’s wedge locking system.
Metallurgical Composition: The Mn18Cr2 Advantage
The service life of the MM0224994 plate is governed by its ability to manage the trade-off between ductility and surface hardness. We utilize a precise Mn18Cr2 (ASTM A128 Grade C) chemistry, engineered specifically for high-stress primary crushing applications.
Austenitic Stability and Strain Hardening:
Standard manganese steel (Mn13) often lacks the stability required for modern high-power crushers like the C110 (110 kW drive). Our Mn18Cr2 alloy increases manganese content to 17.5-19.0% and Carbon to 1.15-1.25%.
Mechanism: In its as-supplied state, the plate has a hardness of approximately 220 HBW and an austenitic microstructure. Upon impact with granite or basalt feed (Compressive Strength > 200 MPa), the surface crystal lattice deforms. This mechanical stress induces a phase transformation from austenite to martensite in the top 5-8mm of the material.
Result: The surface hardness rapidly escalates to 500-550 HBW (approx. 52 HRC), creating a self-renewing wear-resistant skin. Crucially, the subsurface remains ductile (impact energy > 140 J/cm²), preventing the plate from cracking under the C110’s heavy toggle stroke.
Chromium Carbide Reinforcement:
The “Cr2” designation indicates a 1.8-2.2% Chromium addition. Chromium increases the initial yield strength of the alloy. This is vital for preventing “plastic flow” or “mushrooming”—a failure mode where the metal deforms laterally under pressure, expanding the plate dimensions and causing it to become hopelessly jammed in the crusher frame.
Geometric Engineering: Wave-Groove Tooth Profile
The tooth profile of the MM0224994 is not arbitrary; it is a calculated response to the physics of rock mechanics.
- Optimized Nipping Angle: The frictional grip on the rock depends on the nipping angle (the angle between the fixed and movable jaws). The vertical ridges are machined with a pitch and depth (12-16mm) designed to keep the effective nipping angle below 24 degrees. If the teeth wear too flat, this angle increases, causing rock slippage (reducing throughput) and accelerated abrasive wear due to grinding rather than crushing.
- Point Loading Amplification: The parallel ridges reduce the contact surface area between the plate and the rock. Since Pressure = Force / Area, reducing the area significantly increases the localized crushing pressure. This allows the C110 to fracture hard, competent rock with less energy input compared to flat or worn liners.
- Material Flow Dynamics: The valley geometry between ridges is designed to allow fines (material < CSS) to pass through freely. This reduces "packing" in the crushing chamber—a condition that generates extreme hydraulic-like pressures capable of bending the pitman or snapping the toggle plate.
Manufacturing and Heat Treatment Protocols
The integrity of a 1788 kg casting requires rigorous process control to prevent internal shrinkage porosity, which acts as a stress riser.
Solution Annealing and Water Quenching:
The casting is heated to 1050°C-1100°C and held for a specific duration (1 hour per 25mm of section thickness) to dissolve carbides into the austenitic matrix. It is then rapidly water-quenched.
Quality Check: If the quench is too slow, carbides precipitate at the grain boundaries, leading to embrittlement. We verify the microstructure using test coupons to ensure < 5% grain boundary carbides.
Precision Machining of Mounting Surfaces:
The back surface of the MM0224994 fixed jaw is machined to a flatness tolerance of 0.3mm per meter.
Engineering Necessity: A rough, as-cast back surface creates point contacts with the front frame. Under the crushing load (up to 3,000 kN), these points yield, causing the plate to loosen. A loose plate creates “chatter,” effectively hammering the front frame face and causing expensive damage. The machined back ensures 100% surface contact, transmitting loads evenly into the crusher structure.
Technical Specifications Data
| Parameter | Specification Value | Standard / Note |
|---|---|---|
| OEM Part Number | MM0224994 | Metso C110 Fixed Jaw |
| Component Weight | 1788.29 kg (±2%) | Verified Scale Weight |
| Material Designation | Mn18Cr2 (High Manganese) | ASTM A128 Grade C Equivalent |
| Initial Hardness | 220 – 250 HBW | As-Cast / Solution Annealed |
| Work-Hardened Potential | 500 – 550 HBW | Surface Hardness under Load |
| Yield Strength ($R_{p0.2}$) | ≥ 350 MPa | To resist plastic deformation |
| Tensile Strength ($R_m$) | ≥ 800 MPa | Ultimate breaking strength |
| Impact Toughness | ≥ 150 J/cm² @ -20°C | Charpy U-Notch (Low Temp Durability) |
| Thermal Operating Range | -30°C to 380°C | Structure remains stable |
Installation and Frame Compatibility
The C110 utilizes a specific wedge retention system. The MM0224994 casting includes precision-angled upper and lower faces to mate with the locking wedges.
Dimensional Tolerance (ISO 2768-mK):
The overall length and width are controlled to ensure the plate fits between the cheek plates (side liners) with adequate clearance for thermal expansion. Manganese steel has a thermal expansion coefficient approx. 1.5x that of carbon steel. If the fit is too tight laterally, the plate will bow outward when it heats up during operation, snapping the retention bolts.
Wear Monitoring:
The premium red coating serves as a visual indicator for storage and initial wear patterns. However, operators should monitor the profile depth. Once the corrugations are worn to < 30% of their original depth, crushing efficiency drops by approximately 20%, and power consumption per ton rises significantly.
Total Cost of Ownership (TCO) Analysis
Replacing a fixed jaw on a C110 is a major maintenance event requiring craneage and 4-6 hours of downtime.
Generic Mn13 Plate: Lower initial cost, but rapid wear in high-silica applications. Frequent changes increase labor costs and lost production revenue.
Engineered Mn18Cr2 Plate: Higher impact energy and work-hardening rate extend the wear life by 30-50% in abrasive applications (Silica > 15%).
For a quarry operating 2,000 hours/year, utilizing premium metallurgy can eliminate 1-2 changeouts annually. Assuming a downtime cost of $3,000/hour (lost production + labor), the savings from extending the interval far exceed the price differential of the casting.
Engineer’s Advice: Field Operations & Maintenance
[Option B: Pro-Tip] – The “Shim” Protocol for Frame Protection:
The front frame of the C110 is prone to wear if plates have been allowed to chatter in the past. Before installing the new MM0224994 plate, place a straight edge vertically against the frame face. If you detect a gap greater than 2mm (convex or concave wear), you must use steel shims or a backing compound (epoxy). Bolting a flat machined plate to a curved frame will cause the casting to crack vertically down the center under the first heavy load. The plate is designed to be supported across its entire back surface; it is not a structural beam.
[Option C: Field Case Snippet] – Dealing with Plastic Flow:
In high-compression applications, even Mn18Cr2 will flow slightly at the edges. I have seen maintenance teams struggle for hours to remove a fixed jaw because the edges had “mushroomed” and locked against the cheek plates.
Preventative Measure: Every week, during the liner inspection, check the vertical gaps between the fixed jaw and the cheek plates. If you see the metal flowing and closing this gap, use a portable grinder or thermal lance to trim the edges before it becomes a solid mechanical lock. This 10-minute maintenance task will save you 4 hours of torch cutting during the next liner change.
Technical Parameters of Applicable Jaw Crusher
Workshops And Warehouses
Cross-Brand Compatible
Our aftermarket casting division ensures that the MM0224994 is fully interchangeable with the OEM specification, adhering to the same weight distribution and wedge-locking geometry.
| Brand | Series | Crusher Model |
|---|---|---|
| Mettso | Nordberg Jaw C series | C3054，C3055，C63，C80，C96，C105，C106，C110，C116，C120，C125，C130，C140，C145，C150，C160，C200 |
| Nordberg Bergeaud VB Series | VB46 ， VB57 ， VB67 ， VB83 ， VB93 ， VB105 ， VB108 ， VB0907 ， VB1008 ， VB1311 | |
| Sandvick | Jaw Crusher CJ series | CJ815, CJ615, CJ613, CJ612, CJ412, CJ411, CJ409, CJ211 |
| Kleemann | Mobicat Jaws series | MC100R EVO，MC110R EVO ， MC110Z EVO ，MC120Z PRO，MC125Z ， MC140Z，MC160PRR |
| SSTR Jaws series | SSTR1000，SSTR1100， SSTR1200， SSTR1250，SSTR1400， SSTR1600 | |
| Shanbao | Jaw Crusher PE series | PE150x250, PE250x400, PE400x600, PE500x750, PE600x900, PE750x1050, PE900x1200, PE100X1200, PE1200x1500, PE1500x1800. |
| Jaw Crusher PEX series | PEX250x750, PEX250x1000, PEX250x1200, PEX300x1300 | |
| Trio | CT Jaw Series | CT1030，CT1040，CT1048，CT1252，CT2036，CT2436，CT3042，CT3648，CT4073，CT4254，CT4763，CT6080，APS40 |
| Extec | QJ Mobile Crushers | C10 ，C12，QJ241，QJ341 |
| Allis Chalmers / Svedala | Allis Chalmers Superior Jaw Series | 36 x 48 Superior， 60 x 84 Superior |
| Allis Chalmers STD Jaws | 10x 24 ，15 x 24 ， 18 x 30 Model B ， 18 x 36， 24 x 36， 25 x 36 “A-1 New， 42 x 40 A1 ， 36 x 48 New ， 42 x 48 A1 ，48×60 ， 66 x 84 A1 | |
| Svedala CJ Series | CJ208，CJ209，CJ211，CJ408，CJ409，CJ411，CJ412，CJ612 ，CJ613，CJ615， CJ815 | |
| Svedala RT Series | RT6090 (24X36) ， RT75105 ( 30 x 42 ) ， RT60-120 (24 x 48 ) ， RT 80-120 (32 x 48) ， RT105-120 (42×48) ， R10580 (1050×800) | |
| Svedala Jawmaster Series | 1108HD (32 x 42) ， 1206HD (24 x 48) ， 1208HD (32×48) ， 1211HD (44 x 48 ) ， 1312HD (46×52) ， 1513HD (52×60) | |
| Terex | Jaques JW Range | JW40， JW42 ， JW45， JW55 |
| Jaques ST Range | ST36， ST42， ST47，ST48， ST54，ST60 | |
| Cedarapids JC Range | JC2236，JC3660，JC5460，JS3750，JS4552，JC5460 | |
| Cedarapids Old Range | 10×16，12×16，10×20，10×24，15×24，18×24，20x25A ， 18×30 ，10×36 ，12×36，15×36 ，18×36，20×36， 24×36，25×40，32×40，12×42，16×42，27×42，42×42，36×48， | |
| 12×48，16×48，22×48，42×48，57×48，35×54，36×60，54×60，10×72 | ||
| Finlay Mobile Jaw Series | J-960，J-1160，J-1170，J-1175，J-1480 | |
| Powerscreen Premiertrak | XA300， XA400 ， XR400 ， XA400S， XR400S， Premiertrak 600 ，XA750 | |
| BL-Pegson Premiertrack | 1100×650 ， 1100x650HA ， 1100x650HR ， 1100×800 | |
| BL-Pegson Premierplant | 900×600 ， 1100×650 ， 1100×800 | |
| BL-Pegson Stationary Jaws | 24×14 ，32×18 ， 32×22， 32×06 ， 36×20 ， 36×22 ， 36×24 ， 36×25 ，42x30B ， 42x30D ， 44×26 ，44×32 ， 48×42 | |
| Telsmith | Telsmith Old Jaw Range | 10×21，14×24，24×5，30×42，42×48 |
| Hydraulic Jaw Range | 2038, 2550, 3042, 3055, 3648, 3258, 3858, 4448, 5060 | |
| Hydra & Iron Jaw Range | H2238, H2550, H3244, H3450, H4448, H5060, H3042, H3055, H3648, H3258, H3858, ，4448IG ，5060IG, | |
| Komatsu | BR Jaw Series | BR100JG，BR200，BR210，BR300，BR350，BR380，BR500，BR550JG，BR580 |
| Chyi Meang | PJS Series | PJS800， PJS900，PJS1050，PJS100,PJS1100，PJR1350， PJS1260， PJS1400，PJS1500，CMNJS4836 |
| Comec Primary Jaw Crusher | P90.65， P900 ，P105.75 ， P1100 ，P1300 ，P1600 | |
| Comec Secondary Jaw Crusher | S800 ，S900 ，S1000 ，S1450 | |
| Goowin Barsby | Series 5 Jaws | 30″x18″，42″x24″ ，42″x30″ ，36″x6″ Granulator |
| Krupp | Jaw Range | ERC18-14 ，EB12-10 ，EB14-11 ，EB16-12，EB20-15 |
| Kawasaki | KS Series Jaws | KS-3624，KS-3018， KS-4230G，KS-4840，KS-6048， KD-4232G，KD-4842G |
| Hewitt-Robins | Jaw Range | 10×24， 18×30 ，10×36 ，12×36 ，15×36 ，20×36 ，24×36 ，30×36 ，30×42 ，12×48 ，22×48，30×48 ，36×48，42×48， 36×50 ，12×60，30×60，， 18×30 ，10×36 ，12×36 ，15×36 ，20×36 ，24×36 ，30×36 ，30×42 ，12×48 ，22×48，30×48 ，36×48，42×48， 36×50 ，12×60，30×60，48×60，30×62 |
| Lippmann | Jaw series | 2248, 2436, 3042, 3048, 3055, 3062, 3650, 3862, 4248, 5062 |
| Parker | Jaw series | Parker40x32 ， Parker 36×10 ， Parker 38×12 Stonesizer ， Parker 20×12 ， Parker16x10 ， Parker16x5 |
| Brown Lenox Kue-Ken | Jaw Series | Model 22(3 x 12) ， Model 24 (5 x 12)， Model 25 (7×12) ，Model 34 (6 x 16) ， Model 35(9 x 16)， Model 54( 8 x 24)， Model 55(10 x 24) ，Model 56 (12 x 24）Model 68 (9 x 30) ， |
| Model 69(12×39) ， Model 70 (15 x 30) ， Model 75S (20 x 30) ， Model 79 (8 x 36)， Model 80(10 x 36) Model 81(12 x 36)， Model 89 (16 x 36) ， Model 90(20 x 36) ， Model 95 (24 x 36) ， | ||
| Model 95S( 29 x 36) ， Model 104( 8 x 42) ， Model 105(10 x 42)， Model 106 (12 x 42)， Model 106S (14 x 42) ， Mode ，107 (17 x 42) ，Model 108 (20 x 42) ， Model 110(25 x 42) ， | ||
| Model 120 (30 x 42) ， Model 126(36 x 42) ，Model 145 (24 x 48) ， Model 150(36 x 48) ， Model 150A (40 x 48) ， Model 150s (42 x 48)， Model 160 (42 x 48) ， | ||
| Model 188 (26 x 60) Model 32 x 60 ， Model 200 (48 x 60) | ||
| Hitachi-Nakayama | Nakayama Primary Range | AC1410，AC2415，AC3219，AC3219B，AC4219，AC4220，AC4220B， AC482，AC6030 |
| Nakayama RC Range | SK3624，RC3624，RC4224，RC4228，RC4832，RC5042，RC6048，RS4032，RS4230 | |
| Hitachi Mobile Jaw | HR240，HR420G | |
| Fintec | Mobile Jaw crushers | 1107RJ ，1108 ，542， 570 ，640 |
| McColskey | Mobile Jaw Series | J35 ，J40， J44， J45， J50， J40V2， J45V2 ，C50 |
| Minyu | MS Jaw Series | MS2416 ， MS3020 ， MS3624 ， MS4226 ， MS4230 ， MS4832 ， MS4840 ， MS5432 ， MS6040 ， MS6048 |
| MSH Jaw Series | MSH3624 ， MSH4230 ， MSH5434 | |
| Russia | CMD/SMD Jaw Series | СМД-741 ，СМД-108，СМД-109，СМД-110，СМД 118，СМД 111，СМД 117 |
| Keestrack | Mobile Jaw Series | B3， B4 ， B5 ， B7 |
| Astec | Pioneer Standard Jaw Series | 10×16，10×20，10×24，15×24，10×30，18×30，8×36，9×36，10×36，13×36，15×36，18×36，20×36，24×36，26×40，30×42，36×42，31×44，35×46，10×47，21×48，42×48，24×49， |
| 33×50，28×54，30×55 | ||
| KPI-JCI Jaw Series | 2742 ，2650，3055，3365，4448IG，5060IG，2238H，3244H，3450H | |
| Tesab | Mobile Jaw Range | 10570, 10580, 700i, 800i, 800ie |
| Liming SBM | Liming /Vipeak PE Range | PE 400×600 ，PE 500×750 ，PE 600×900 ，PE750x1060，PE 900×1200，PE 1000×1200 |
| Shanghai Shibang /Zenith PEW Range | PEW250x1000，PEW250x1200，PEW400x600，PEW760，PEW860，PEW1100，PEW200x1300 | |
| CX Range | C6X80，C6X100，C6X110，C6X145，C6X160，C6X200，HJ98，HJ110，HJ145 | |
| Jaw Plate Corrugated | CJ Series | CJ208，CJ209，CJ211，CJ408，CJ409，CJ411，CJ412，CJ612 ，CJ613，CJ615， CJ815 |
| Universal Engineering | Universal Jaw Crusher Range | 24×36，25x40WRB，30×42，32x42WRB，12×48，22×48，32×48，36×48，44x48WRB ，32×54 ，42×50，12×60 ，50x60WRB |
*All manufacturer names, part numbers and descriptions are used for reference only. They belong to their respective OEMs. NEWREG supplies aftermarket replacement parts – independently manufactured and warranted, not OEM-originated. No affiliation with OEMs is claimed or implied.
“Authoritative Engineering Data: All critical metallurgical specifications and dimensional tolerances (e.g., ±0.05mm) are strictly governed by the master English documentation. While localized versions are provided for operational reference, the English original remains the sole binding authority for quality inspection and technical compliance.”
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