SK5 SK85 Special Steel Strip Bright Tempered Carbon Steel Coil
Parameters | Recommendation |
Steel Grade | SK5 (SK85) |
Brand | Baomit |
Certification | ISO9001:2015 |
Hardness | 580 – 620 HV |
Surface Finish | White polished, blue polished, yellow polished |
Edges | Slit, square or round |
Thickness Tolerance | +/- 0.005 |
Width Tolerance | +/- 0.10 |
Camber | Max 1mm per 3m |
![SK5 SK85 Special Steel Strip Bright Tempered Carbon Steel Coil](https://baomitsteel.com/wp-content/uploads/8660.png)
Our Advantages:
• Excellent wear resistance
• Precise thickness and width tolerances
• Maximum straightness deviation of 1 mm / 6 m
• Good surface finish
• Consistent, specially adapted microstructure
Chemical Composition % of Steel SK5 (SK85)
C | Si | Mn | P | S | Cr | Ni | Cu |
0.80-0.90 | 0.10-0.35 | 0.10-0.50 | max 0.03 | max 0.03 | max 0.3 | max 0.25 | max 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 |
SK5 SK85 Special Steel Strip Bright Tempered Carbon Steel Coil
Place of Origin: China
Manufacturer: Hubei Baomit Steel Materials Co., Ltd.
Steel Grade: SK5 (SK85)
Equivalent Grades: SAE1085, C90U
Supply Condition: Hardened and Tempered (H & T)
Applications: Tape Measures
Brand: BAOMIT
Min Order: 1 Ton
Package: Pallet
Delivery Time: 4-5 weeks
Payment Term: L/C, T/T, Western Union
Production Capacity: 300 tons per month
![SK5 SK85 Special Steel Strip Bright Tempered Carbon Steel Coil](https://baomitsteel.com/wp-content/uploads/baomit-steel.jpg)
"Baomit strip steel stands for precision, quality and high performance. Our factory is excellent in terms of comprehensive delivery indicators, such as straightness, flatness, mechanical properties and metallographic uniformity."
- Mr. Lixian Yang
Company CEO