NP1213 Blow Bar
Cast in Cr26 or ceramic-insert composite at 1285 x 320 x 108 mm. Machined to your drawing, not pulled off a shelf. Minimum order one set, quotation within 24 hours.
Metso NP1213 / Nordberg NP series
1285 x 320 x 108 mm
58-66 HRC, material dependent
one set
What actually decides how long an NP1213 bar lasts
Feed size, not chemistry
A bar rated at 62 HRC will still fail in three weeks if 700 mm lumps are going into a 1,200 mm rotor. We ask for your top size and closed-side setting before recommending a grade, because it changes the answer more than the chrome content does.
Chrome content is a range, not a label
Cr26 covers a wide spread. We verify every heat by optical emission spectrometry before pouring, and hold 58-66 HRC after heat treatment. A three-point hardness drop across a batch is what makes one bar last 40% longer than its neighbour.
Fit and gap
A bar sitting 2 mm proud changes the impact angle for the whole rotor and wears the rest of the set with it. Every set is checked dimension by dimension against your drawing or a measured sample.
Cr26 or ceramic insert? Match it to the feed
| Feed material | Abrasiveness | Our recommendation |
|---|---|---|
| Limestone, low silica | Medium | Cr26 high chrome |
| River gravel, high silica | High | Ceramic-insert composite |
| Granite, basalt | Very high | Ceramic-insert composite |
| Reinforced concrete, C&D recycling | High, with tramp metal | Martensitic or ceramic-insert |
What ships with every order
Optical emission spectrometry report, traceable to the heat number
Hardness map, three points per bar
Dimensional report measured against your drawing
Photos of the packed case before it leaves the yard
If a shipment arrives with a problem, these four documents are how we settle it in one conversation instead of three weeks of emails.
How to order
Send three numbers
Length, width, thickness. Or a drawing, a part number, or a photo of the worn bar next to a ruler.
We come back within 24 hours
With the grade we recommend, the weight per piece, the CBM per case, and the lead time.
Approve, deposit, cast
25 days from deposit to a packed case. Air freight available for trial orders of one or two sets.