STANDARD ALLOYS INDIAAustenitic manganese steel
Large feed, low-abrasion rock and tramp metal, such as primary crushing of limestone.
ASTM A128 · IS 276 · EN 10349
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Blow bars
Blow bars strike the feed at rotor speed and throw it against the impact plates. No single alloy suits every rock: the choice is a trade between wear life and the risk of breakage.
- Works in
- Rotors of horizontal-shaft impact crushers in quarries and cement plants.
- Industries
- Aggregate, Cement
- Materials
- Manganese steel, 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
Simplified 3D model · drag to turn
01
How it fails and what we do about it
- 01Edge wear that rounds the striking faceA harder grade where the feed is clean and impact is moderate.
- 02Fracture on tramp metal or oversizeA tougher grade where tramp metal or large feed is expected.
- 03Movement in the rotorSeating faces and clamping grooves held to drawing.
02
Choosing the grade
Typical values from the governing standards. A metallurgist confirms the grade for your duty with every quotation.
Cr-Mo and martensitic steels
All-round duty: secondary crushing, mixed feed and moderate abrasion.
IS 4896 · Customer specification
High-chromium white iron
Clean, abrasive feed of controlled size, with no tramp metal.
ASTM A532 Class II and III · IS 4771 · ISO 21988 / EN 12513
03
What we control
- Grade set by the dutyFeed size, abrasiveness and the risk of tramp metal decide the alloy, not habit.
- Fast quenchManganese parts go from furnace to water in about 45 seconds, so carbides stay in solution.
- Tested every heatChemistry by spectrometer and hardness on every heat; tensile and impact tests as specified.
- Fit where it mattersPin bores, seats and clamping faces machined to drawing.
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.
Blow bars
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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