The industry-standard nickel-alloyed backing strip. Ni 1.80–2.10% provides unmatched fatigue resistance, low-temperature toughness, and perfect weld compatibility with M42/M51 cutting edges.
Get Quote for 75Ni8 View Specs ↓75Ni8 is explicitly listed in EN 10132-4 for band saw and frame saw applications. The nickel content provides superior fatigue resistance — critical for the millions of flex cycles a bi-metal blade endures. This is the grade that major European and Asian bi-metal blade manufacturers specify.
Competitive Note: Major competitors such as baomitsteel.com do not list 75Ni8 in their product range. Our direct supply of this critical bi-metal backing grade is a distinct advantage for blade manufacturers seeking reliable sourcing.
75Ni8 combines 0.72–0.78% carbon with 1.80–2.10% nickel. The nickel refines the grain structure, increases toughness, and provides the ductility needed for electron-beam or laser welding with HSS cutting edges.
| C % | Si % | Mn % | Cr % | Ni % | Mo % |
|---|---|---|---|---|---|
| 0.72–0.78 | 0.15–0.35 | 0.30–0.50 | — | 1.80–2.10 | — |
Bi-metal backing demands tight thickness control for consistent weld quality. Standard supply at T2–T3 class per EN 10132-4.
| Thickness (mm) | T1 | T2 | T3 | T4 | T5 |
|---|---|---|---|---|---|
| 0.020–0.040 | ±0.002 | ±0.003 | ±0.004 | ±0.005 | ±0.008 |
| 0.040–0.080 | ±0.003 | ±0.004 | ±0.006 | ±0.008 | ±0.012 |
| 0.080–0.150 | ±0.004 | ±0.006 | ±0.008 | ±0.012 | ±0.018 |
| 0.150–0.300 | ±0.005 | ±0.008 | ±0.012 | ±0.016 | ±0.024 |
| 0.300–0.600 | ±0.008 | ±0.012 | ±0.016 | ±0.024 | ±0.035 |
| 0.600–1.000 | ±0.010 | ±0.016 | ±0.022 | ±0.030 | ±0.040 |
| 1.000–1.600 | ±0.014 | ±0.020 | ±0.028 | ±0.036 | ±0.050 |
| 1.600–2.500 | ±0.018 | ±0.026 | ±0.035 | ±0.045 | ±0.060 |
| Width (mm) | W1 | W2 | W3 |
|---|---|---|---|
| ≤ 25 | ±0.05 | ±0.10 | ±0.15 |
| 25–50 | ±0.08 | ±0.15 | ±0.25 |
| 50–100 | ±0.10 | ±0.20 | ±0.35 |
| 100–200 | ±0.15 | ±0.30 | ±0.50 |
| 200–300 | ±0.20 | ±0.40 | ±0.60 |
Purpose-built for high-fatigue applications where crack propagation resistance determines blade life.
The industry standard backing material for M42 and M51 bi-metal blades. Nickel content ensures reliable electron-beam weld joints with HSS cutting edges. Used by tier-1 blade manufacturers globally.
Frame saws demand extreme fatigue resistance due to high-frequency reciprocating motion. 75Ni8 resists crack initiation at the weld zone and blade body under sustained cyclic stress.
Continuous-loop band knives for heavy-duty cutting applications where plain carbon steel would fatigue-fail prematurely. The nickel alloying extends service life by 2–3x.
The consistent fatigue properties and tight thickness tolerances make 75Ni8 a viable alternative for compressor valve reeds where traditional C-steel grades fall short.
Plain carbon C75S costs less per kg, but 75Ni8 is the only serious choice for bi-metal band saw production where fatigue life and weld integrity determine blade quality.
Verdict: C75S is a budget option, but no serious bi-metal blade manufacturer uses plain carbon for backing. 75Ni8 is the mandatory specification for blades that need to survive millions of flex cycles without weld-zone cracking.
Direct factory supply of a grade that many competitors cannot source. Full traceability and EN 10132-4 compliance.
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