STANDARD ALLOYS INDIACr-Mo and martensitic steels
Grates and plates in most mills.
IS 4896 · Customer specification
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Diaphragms and discharge grates
Diaphragms separate the chambers of a cement mill; discharge grates let ground material leave a ball mill while holding the media back. Either way, slot condition decides grinding efficiency long before the plate wears out.
- Works in
- Intermediate and outlet diaphragms of two-chamber cement mills and discharge grates of grate-discharge ball mills.
- Industries
- Cement, Mining
- Materials
- Cr-Mo steel, High-chromium iron
- Size
- Single pieces from 3 kg to 7 tonnes, to drawing
- Supplied
- As cast, or machined to drawing
- Inspection
- Chemistry and hardness on every heat; UT, MPI or DPT and a dimensional report as specified
- From a worn part
- Yes. Send the part or photographs with key dimensions and we will reverse-engineer it
01
How it fails and what we do about it
- 01Slot wear that lets coarse media throughSlot widths cast to drawing, with a harder grade on the coarse side.
- 02Slots blindingSlot taper and layout kept to the original design.
- 03Cracking of plates and gratesHeat-treated Cr-Mo steel for toughness.
02
Choosing the grade
Typical values from the governing standards. A metallurgist confirms the grade for your duty with every quotation.
High-chromium white iron
Positions with high abrasion and low impact.
ASTM A532 Class II and III · IS 4771 · ISO 21988 / EN 12513
03
What we control
- Hardened through the sectionWhite iron alloyed and heat treated for the thickness of each segment, not just its surface.
- Structure checkedMicrostructure examined with an image analyser, so carbide and matrix are verified, not assumed.
- Fit as a setSegments checked against each other and against gauges so they assemble without forcing.
- Machined to drawingBores, journals and fixing faces finished on vertical lathes and machining centres.
04
For a quotation, send any of these
- Equipment make and model, or the OEM part number
- Drawing, or the worn part or photographs with key dimensions
- The grade used today and the life it gives
- Quantity per set and sets per year
No drawing? Send the worn part or photographs with key dimensions and we will reverse-engineer it.
Diaphragms and discharge grates
A metallurgist reviews every enquiry and replies with a price, a lead time or the right questions.
Or call +91 145 269 5110
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