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TFI Co. supplies M51 bi-metal bandsaw blade stock in 30 metre coils for plants in Dubai and across the UAE that cut tough, heat-resistant metals. This page explains what M51 adds over M42, which materials justify it, how 30 m coils fit a planned inventory, and how our bulk M51 coil programme works.
What makes M51 different from M42
M42 is the general-purpose workhorse of metal-cutting bandsaws; M51 is the step up for severe conditions. Its high-speed steel edge carries more cobalt (10%) plus tungsten, with a tooth-tip hardness of approximately 68-69 HRC. The practical gains:
Red hardness.
Teeth keep hardness and sharpness at the high temperatures of cutting tough alloys.
Wear resistance.
Better resistance to the abrasion of titanium, Inconel, nickel superalloys and heavy stainless.
Fatigue-resistant back.
Takes heavy feed forces without premature cracking.
Red hardness.
Teeth keep hardness and sharpness at the high temperatures of cutting tough alloys.
Wear resistance.
Better resistance to the abrasion of titanium, Inconel, nickel superalloys and heavy stainless.
Fatigue-resistant back.
Takes heavy feed forces without premature cracking.
| Property | M42 bi-metal | M51 bi-metal |
|---|---|---|
| Role | General production cutting | Severe, high-heat cutting |
| Tooth edge alloying | HSS with cobalt | HSS with higher cobalt (10%) and tungsten |
| Typical materials | Carbon, structural and alloy steel, stainless, tube | Titanium, Inconel, nickel superalloys, heavy stainless, tool steel |
| Blade cost | Lower | Higher, offset by longer life on difficult work |
Role
- M42 bi-metal
- General production cutting
- M51 bi-metal
- Severe, high-heat cutting
Tooth edge alloying
- M42 bi-metal
- HSS with cobalt
- M51 bi-metal
- HSS with higher cobalt (10%) and tungsten
Typical materials
- M42 bi-metal
- Carbon, structural and alloy steel, stainless, tube
- M51 bi-metal
- Titanium, Inconel, nickel superalloys, heavy stainless, tool steel
Blade cost
- M42 bi-metal
- Lower
- M51 bi-metal
- Higher, offset by longer life on difficult work
Materials that justify M51
M51 earns its price where heat at the tooth tip, rather than tooth breakage, limits blade life. Typical cases in the region:
Nickel-based alloys and Inconel for oil and gas, power and petrochemical components
Titanium bar and billet
Duplex and heavy-section austenitic stainless steel
Tool steels and high-alloy steels
Large solid sections where the blade spends a long time in each cut
Nickel-based alloys and Inconel for oil and gas, power and petrochemical components
Titanium bar and billet
Duplex and heavy-section austenitic stainless steel
Tool steels and high-alloy steels
Large solid sections where the blade spends a long time in each cut
| Material group | Cutting practice |
|---|---|
| Nickel alloys and Inconel | Low blade speed, typically around 20 to 30 m/min; positive feed; generous coolant |
| Titanium | Low speed, steady feed so the tooth never dwells; plenty of coolant to carry heat away |
| Duplex and heavy stainless | Slower than carbon steel; keep teeth cutting, not rubbing, to avoid work hardening |
| Tool and high-alloy steel | Moderate speed; check hardness first, as fully hardened stock may need carbide |
Nickel alloys and Inconel
- Cutting practice
- Low blade speed, typically around 20 to 30 m/min; positive feed; generous coolant
Titanium
- Cutting practice
- Low speed, steady feed so the tooth never dwells; plenty of coolant to carry heat away
Duplex and heavy stainless
- Cutting practice
- Slower than carbon steel; keep teeth cutting, not rubbing, to avoid work hardening
Tool and high-alloy steel
- Cutting practice
- Moderate speed; check hardness first, as fully hardened stock may need carbide
Why buy M51 in 30 metre coils
A 30 m coil can be cut and welded into several blades of your machine length, so a plant with an in-house welder can make a replacement whenever needed. Coil also allows non-standard lengths and one stock item across every saw sharing a width and thickness.
Weld M51 with the same care as any bi-metal stock: a flash butt welder rated for the band size, the correct annealing cycle on every weld, and flash ground flush. If you do not weld in-house, ask about welded blades.
Specifying M51 coil for your saws
Coil is bought by width, thickness and tooth pitch, so each combination you hold must suit both machine and work. Width and thickness come from the saw: read them from your current blade or the manual. Pitch comes from the work, keeping at least three teeth in the material.
| Large solid billet | Coarse variable pitch, such as 2/3 or 1.4/2 TPI |
|---|---|
| Heavy-wall tube and medium bar | Typically 4/6 or 5/8 TPI |
| Tooth form for tough alloys | Variable pitch with positive rake |
| Saws cutting mainly ordinary steel | Better served by M42 |
- Large solid billet
- Coarse variable pitch, such as 2/3 or 1.4/2 TPI
- Heavy-wall tube and medium bar
- Typically 4/6 or 5/8 TPI
- Tooth form for tough alloys
- Variable pitch with positive rake
- Saws cutting mainly ordinary steel
- Better served by M42
Because M51 is premium stock, avoid holding too many variants. Group the saws that cut difficult alloys and agree one or two pitches that cover their work.
Signs M51 will pay off
M42 teeth turn blue or lose their edge long before they chip; cuts slow down noticeably through each blade; operators reduce speed until output suffers; blade changes on one saw dominate your tooling spend.
Signs to fix setup first
Teeth strip or chip, the cut runs off square, or blades crack in the back. These point to pitch, feed, tension or guide problems that a harder edge will not cure.
Planning M51 stock instead of ordering in a hurry
Downtime on a production saw costs far more than the blade. We favour planned maintenance: treat M51 as a planned consumable, replaced on a schedule by cuts or wear checks rather than at breakage, and we help set that plan up.
Measure consumption.
Record coil metres or blades used per saw per month.
Set a safety stock.
Cover the time between order and delivery, plus a margin for unusual jobs.
Set a reorder point.
Order when stock reaches it; many plants trigger this from maintenance or MRP software.
Review regularly.
Adjust quantities as product mix and volumes change.
Measure consumption.
Record coil metres or blades used per saw per month.
Set a safety stock.
Cover the time between order and delivery, plus a margin for unusual jobs.
Set a reorder point.
Order when stock reaches it; many plants trigger this from maintenance or MRP software.
Review regularly.
Adjust quantities as product mix and volumes change.
The TFI Co. bulk M51 coil programme
Our bulk M51 coil programme is built for companies that manage tooling through demand forecasting. You share expected consumption; we plan production of your coils in line with your lead times, and bulk volumes get good prices.
Suits plants with a structured production schedule and inventory thresholds.
Rewards forecast-based purchasing and long-term tooling cost over reactive buying.
Not an overnight emergency service.
Suits plants with a structured production schedule and inventory thresholds.
Rewards forecast-based purchasing and long-term tooling cost over reactive buying.
Not an overnight emergency service.
Is M51 worth it over M42?
Yes when you cut titanium, nickel alloys, Inconel, heavy stainless or tool steel and M42 blades are dulling quickly from heat. On mild and structural steel, M42 is usually the more economical choice.
How should I compare M51 and M42 on cost?
Compare cost per cut, not purchase price. Divide the blade or coil cost by the number of cuts it delivers in your material, then add the downtime of each blade change. On difficult alloys the longer-lasting M51 edge often wins; on mild steel it rarely does.
What can I make from a 30 m coil?
The number of blades depends on your machine length. Divide 30 m by your blade length, allowing a small amount for squaring the ends at each weld.
Can you supply welded M51 blades?
Ask us when you request a quote. Tell us the welded length and quantity, along with the size and TPI.
How does the bulk coil programme work?
You share your forecast consumption and lead times, and we schedule production of your M51 coils to match. Contact us to discuss volumes.
What details do you need to quote?
Width x thickness, TPI, number of 30 m coils, materials cut and delivery emirate. The guide to ordering TFI Co. bandsaw blades covers the rest.
Order M51 bandsaw blade coils online
Because coil orders depend on the right TPI, width and thickness, TFI Co. works on a direct-quote basis. Include the blade width x thickness, TPI, number of 30 m coils, materials cut, expected monthly consumption and delivery emirate. Bulk and scheduled coil orders get good prices.
- Section
- Bandsaw guides
- Updated
- October 20, 2026
- Reading time
- 6 min read
Order or plan your blade supply
We appreciate scheduled orders, favour planned blade maintenance and offer good prices for bulk orders. Tell us what you need and our team replies by email.
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