Gang Saw Steel
Gang saw steel, also known as gangsaw steel or gang saw blade steel, refers to a type of high-quality steel used in the manufacturing of gang saw blades. Gang saw blades are large, multi-toothed saw blades that are used in the stone processing industry, sawing of marble, granite and other species of rocks for the building industry and other purposes. Up to 100 saw blades can be fitted in a single set-up. The demands made on stone sawing call for straight cuts, high cutting speed and maximum utilization of the expensive diamond-segmented saw blades. Baomit strip steel meets the demands made by saw blade manufacturers and consumers on the quality of the blade material.
| Parameters | Recommendation |
| Thickness Tolerance | T3 |
| Roughness | Class 3 |
| Flatness | Class 3 |
| Surface | White Polished |
| Edges | Slit / deburred |
| Hardness | 41 – 45 HRC |
| Steel Grade | 75Cr1, 75Ni8, 8660 |
Our Advantages
• Excellent fatigue resistance
• High productivity
• Precise thickness and width tolerances
• Maximum straightness deviation of 1 mm / 3 m
• Good surface finish
• Consistent, uniform microstructure
Steel Grades
| Comparison of Norms | ||
| EU / EN | USA / AISI | Chemical Composition |
| 75Cr1 | / | C: 0.70-0.80, Si: 0.25-0.50, Mn: 0.60-0.80, P: max 0.025, S: max 0.025, Cr: 0.30-0.40 |
| 75Ni8 | / | C: 0.72-0.78, Si: 0.15-0.35, Mn: 0.30-0.50, Ni: 1.80-2.10, P: max 0.025, S: max 0.025, Cr: max 0.15, Mo: max 0.10 |
| / | 8660 | C: 0.56-0.64, Si: 0.15-0.35, Mn: 0.75-1.00, P: max 0.035, S: max 0.04, Cr: 0.40-0.60, Ni: 0.40-0.70, Mo: 0.15-0.25 |
Thickness Tolerances
| Thickness (mm) | Tolerances ± mm | ||||
| T1 | T2 | T3 | T4 | T5 | |
| 0.020 – 0.040 | 0.004 | 0.003 | 0.002 | – | – |
| 0.040 – 0.100 | 0.006 | 0.005 | 0.004 | 0.003 | 0.002 |
| 0.100 – 0.125 | 0.007 | 0.005 | 0.004 | 0.003 | 0.002 |
| 0.125 – 0.160 | 0.009 | 0.006 | 0.005 | 0.004 | 0.003 |
| 0.160 – 0.200 | 0.010 | 0.007 | 0.005 | 0.004 | 0.003 |
| 0.200 – 0.250 | 0.011 | 0.008 | 0.006 | 0.004 | 0.003 |
| 0.250 – 0.400 | 0.015 | 0.011 | 0.008 | 0.006 | 0.004 |
| 0.400 – 0.600 | 0.020 | 0.014 | 0.010 | 0.007 | 0.005 |
| 0.600 – 0.800 | 0.023 | 0.017 | 0.012 | 0.008 | 0.006 |
| 0.800 – 1.000 | 0.027 | 0.019 | 0.013 | 0.009 | 0.007 |
| 1.000 – 1.250 | 0.034 | 0.024 | 0.017 | 0.012 | 0.008 |
| 1.250 – 1.600 | 0.039 | 0.028 | 0.020 | – | – |
| 1.600 – 1.750 | 0.046 | 0.033 | 0.023 | – | – |
Width Tolerances
| Thickness (mm) | Width (mm) | Tolerances ± mm | ||
| W1 | W2 | W3 | ||
| ≤0.25 | ≤50 | 0.10 | 0.07 | 0.05 |
| 50 – 125 | 0.15 | 0.11 | 0.07 | |
| >125 | 0.20 | 0.15 | 0.10 | |
| 0.25 – 0.50 | ≤50 | 0.15 | 0.11 | 0.07 |
| 50 – 125 | 0.20 | 0.15 | 0.10 | |
| >125 | 0.25 | 0.20 | 0.15 | |
| 0.50 – 1.00 | ≤50 | 0.20 | 0.15 | 0.10 |
| 50 – 125 | 0.25 | 0.20 | 0.15 | |
| >125 | 0.30 | 0.25 | 0.15 | |
| 1.00 – 1.60 | ≤50 | 0.20 | 0.15 | 0.10 |
| 50 – 125 | 0.30 | 0.25 | 0.15 | |
| >125 | 0.35 | 0.25 | 0.20 | |
| 1.60 – 1.75 | ≤50 | 0.30 | 0.20 | 0.15 |
| 50 – 125 | 0.35 | 0.30 | 0.20 | |
| >125 | 0.40 | 0.30 | 0.20 | |
Surface Roughness
Available in white polished, blue polished and yellow.
| Thickness (mm) | Roughness | ||
| Class 1 | Class 2 | Class 3 | |
| ≤0.50 | Ra≤ 0.30 µm Rt≤ 3.00 µm | Ra≤0.25 µm Rt≤ 2.50 µm | Ra≤ 0.20 µm Rt≤ 2.00 µm |
| 0.50 – 1.00 | Ra≤ 0.35 µm Rt≤ 3.50 µm | Ra≤ 0.25 µm Rt≤ 2.50 µm | Ra≤ 0.20 µm Rt≤ 2.00 µm |
| 1.00 – 1.75 | Ra≤ 0.40 µm Rt≤ 4.00 µm | Ra≤ 0.30 µm Rt≤ 3.00 µm | Ra≤ 0.30 µm Rt≤ 3.00 µm |
Flatness Deviation
Maximum flatness deviation per inch strip width.
| Thickness (mm) | Flatness Deviation | |||
| Class 1 | Class 2 | Class 3 | Class 4 | |
| 0.02 – 0.10 | P60 | P50 | P40 | P30 |
| 0.10 – 0.25 | P50 | P40 | P30 | P20 |
| 0.25 – 0.50 | P40 | P30 | P20 | P10 |
| 0.50 – 1.75 | P35 | P25 | P15 | P10 |
Straightness Deviation
| Strip Width (mm) | Measured Length (3m) | ||
| Class 1 | Class 2 | Class 3 | |
| ≤50 | 3 mm | 2 mm | 1 mm |
| 50 – 125 | 3 mm | 2 mm | 1 mm |
| >125 | 3 mm | 2 mm | 1 mm |
Hubei Baomit Steel Materials Co., Ltd.
ISO 9001: 2015 Certified Manufacturer of Hardened and Tempered (H & T) Strip Steel
