Printing Doctor Blade Steel

Doctor blades play an important role in transferring ink from the anilox roll to the printing plate. A doctor blade removes excess ink from the smooth, non-engraved parts of the anilox roll. Baomit 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. If you would like to learn more the quality of our strip steel then please contact our steel experts.

Parameters	Recommendation
Thickness Tolerance	T2
Roughness	Class 3
Flatness	Class 3
Surface	Polished White, Blue, Yellow
Edges	Round
Hardness	580 – 620 HV
Steel Grade	SK95, C100S, 95Cr1, 420J2, 6Cr13

doctor blade steel SK95, C100S, 95Cr1, 420J2, 6Cr13

Our Advantages

• Excellent wear resistance

• Precise thickness and width tolerances

• Maximum straightness deviation of 1 mm / 3 m

• Good surface finish

• Consistent, specially adapted microstructure

Steel Grades

Comparison of Norms
EU / EN	USA / AISI	Chemical Composition
C100S	1095	C: 0.95-1.05, Si: 0.15-0.35, Mn: 0.30-0.60, Ni: max 0.40, P: max 0.025, S: max 0.025, Cr: max 0.40, Mo: max 0.10
95Cr1	/	C: 0.90-1.00, Si: 0.15-0.30, Mn: 0.20-0.40, P: max 0.025, S: max 0.025, Cr: 0.30-0.40
Japan / JIS: 420J2		C: 0.26-0.40, Si: max 1.0, Mn: max 1.0, Ni: max 0.60, P: max 0.04, S: max 0.03, Cr: 12.0-14.0

Thickness Tolerances

Thickness (mm)	Tolerances ± mm
Thickness (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
Thickness (mm)	Width (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, blue and yellow polished.

Thickness (mm)	Roughness
Thickness (mm)	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
Thickness (mm)	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