TEMPERED SPRING
STEEL STRIPS
High performance strip steel with narrow tolerance for your specific applications
DOCTOR BLADE STEEL
Our strip steel for doctor blades uses high grade steel and is manufactured with precision, making it a key component for ensuring reliable processes in the printing industry. Manufacturers of doctor blades used in gravure or flexographic printing for example, appreciate the consistent quality of our strip steel for doctor blades. It can be reliably processed and its precision guarantees that the products made from it are of excellent quality.
SPECIFICATIONS
High Carbon Steel Chemistry for Doctor Blades Steel
GRADE
MANGANESE
SILICON
SULPHUR
PHOSPHOROUS
CHROME
CARBON
C98
0.95-1.05%
0.35-0.80%
0.15-0.35%
0.35% MAX
0.35% MAX
-
Dimension for Doctor Blades Steel available in stock
Thickness (mm)
Width (mm)
Supply Form
Hardness in HRC
Edge
Surface Finish
0.10
25, 30, 35, 40, 45, 50, 60
Coil
Deburred, rounded
Bright Polished
57 / 58
0.15
25, 30, 35, 40, 45, 50, 60
Coil
Deburred, rounded
Bright Polished
57 / 58
0.20
25, 30, 35, 40, 45, 50, 60
Coil
Deburred, rounded
Bright Polished
57 / 58
Stainless Steel Chemistry for Doctor Blades Steel
GRADE
MANGANESE
SILICON
SULPHUR
PHOSPHOROUS
CHROME
CARBON
SS440B
0.65%
0.45%
0.35%
0.01%
0.02%
13%
Dimension for Stainless Steel Doctor Blades Steel available in stock
Thickness (mm)
Width (mm)
Supply Form
Hardness in HRC
Edge
Surface Finish
0.15
25, 30, 35, 40, 45, 50, 60
Coil
Deburred, rounded
Bright Polished
54 / 55
0.185
25, 30, 35, 40, 45, 50, 60
Coil
Deburred, rounded
Bright Polished
54 / 55
0.235
25, 30, 35, 40, 45, 50, 60
Coil
Deburred, rounded
Bright Polished
54 / 55
Improve
Productivity
Call us on +91-9987568507 for your free samples
FLAPPER VALVE STEEL
The performance and durability of cooling units and air conditioners heavily rely on the quality of valve flaps within their compressors. These flaps play a critical role in managing power fluctuations during compressor operation. Here's where our technical prowess in flapper valve steel and our swift access to these materials set us apart competitively. If you'd like to experience firsthand the exceptional quality of our strip steel, don't hesitate to get in touch with us today
FLAPPER VALVE STEEL PROPERTIES
High Carbon Steel Chemistry for Flapper Valve Steel
GRADE
MANGANESE
SILICON
SULPHUR
PHOSPHOROUS
CHROME
CARBON
C98
0.95-1.05%
0.35-0.80%
0.15-0.35%
0.01
0.02
0.2
Dimension of Flapper Valve Steel available in stock
Thickness (mm)
Width (mm)
Supply Form
Hardness in HRC
Edge
Surface Finish
0.105
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.152
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.203
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.254
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.305
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.381
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.406
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.457
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.508
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.559
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.600
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.630
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.800
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
1.000
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
Finish for Flapper Valve Steel
Edges
Edges are slit and deburred. Shaved edges can be supplied on request.
​
Flatness
Maximum out-of-flatness across and along the strip is 0.20% of the nominal strip width.
​
Straightness
Out-of-straightness is defined as the maximum deviation from a straight-edge of a specified length. The following values apply:
Custom made Hardened & Tempered Steel Strips
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SHOCK ABSORBER STEEL
The performance of shock absorbers relies significantly on the characteristics of the steel utilized, among other factors. When it comes to stamping shops and automotive industry suppliers, they place their complete trust in the unwavering dependability of the supplied raw material throughout the manufacturing process. Our customers benefit from enhanced process stability when crafting shock absorber valves, resulting in extended tool longevity and subsequently, a positive impact on production expenses.
SHOCK ABSORBER STEEL PROPERTIES
High Carbon Steel Chemistry for Shock Absrober Shims
GRADE
MANGANESE
SILICON
SULPHUR
PHOSPHOROUS
CHROME
CARBON
C98
0.95-1.05%
0.35-0.80%
0.15-0.35%
0.01
0.02
0.2
Dimension of Shock Absorber Shims Steel available in stock
Thickness (mm)
Width (mm)
Supply Form
Hardness in HRC
Edge
Surface Finish
0.102
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.114
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.152
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.203
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.254
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.305
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.381
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.40
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.457
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.508
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.559
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.600
40, 45, 50, 60, 100, 150
Coil
Slit & Deburred
Bright Polished
54 / 55
Finish for Shock Absorber Shim Steel
Edges
Edges are slit and deburred. Shaved edges can be supplied on request.
​
Flatness
Maximum out-of-flatness across and along the strip is 0.20% of the nominal strip width.
​
Straightness
Out-of-straightness is defined as the maximum deviation from a straight-edge of a specified length. The following values apply:
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SPRING STEELS
If precision strip steel is what you require, then Harper Steel Strips is your answer. The applications are so numerous that listing them all is a challenge. We provide custom-tailored strip steel for an extensive range of uses, including sewing machine needles, strippers, crepers, scrapers, doctor blades, springs, knives, chocolate knives, musical instrument reeds, textile sinkers, formed components, and many more."
SPRING STEEL STRIPS PROPERTIES
High Carbon Steel Chemistry for Spring Steel Strips
GRADE
MANGANESE
SILICON
SULPHUR
PHOSPHOROUS
CHROME
CARBON
C98
0.95-1.05%
0.35-0.80%
0.15-0.35%
0.01
0.02
0.2
Dimension for Spring Steel Steels available in stock
Thickness (mm)
Width (mm)
Supply Form
Hardness in HRC
Edge
Surface Finish
0.100
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.110
Coil
Slit & Deburred
Bright Polished
54 / 55
4 to upto 150
0.120
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.150
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.170
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.200
Coil
Slit & Deburred
Bright Polished
54 / 55
4 to upto 150
0.250
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.270
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.300
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.350
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.400
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.510
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.800
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
0.910
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
1.00
4 to upto 150
Coil
Slit & Deburred
Bright Polished
54 / 55
Finish for Spring Steel Strips
Edges
Edges are slit and deburred. Shaved edges can be supplied on request.
​
Flatness
Maximum out-of-flatness across and along the strip is 0.20% of the nominal strip width.
​
Straightness
Out-of-straightness is defined as the maximum deviation from a straight-edge of a specified length. The following values apply: