Hardened and Tempered Stainless Steel Strip 420J2

420J2 Hardened Tempered Martensitic Stainless Steel Strip

Baomit offers hardened and tempered martensitic stainless steel in 420J2, 440A, 440B and 440C grade. Martensitic steel is a type of stainless steel that is well known for its strength, corrosion resistance, and durability. These qualities make martensitic steel a good choice for a variety of applications, like automotive, machinery parts, and saw blades, for products typically subjected to harsh environments and demanding applications.

Parameters	Recommendation
Steel Grade	420J2
Brand	BAOMIT
Certification	ISO9001:2015
Hardness	48 – 52 HRC
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

420J2 Hardened Tempered Martensitic Stainless Steel Strip

Our Advantages

• Excellent fatigue resistance

• Excellent punching and stamping properties

• Precise thickness and width tolerances

• Maximum straightness deviation of 1 mm / 3 m

• Good surface finish

• Consistent, uniform microstructure

Chemical Composition % of 420J2 Stainless Steel

C	Si	Mn	Ni	P	S	Cr
0.26-0.40	max 1.0	max 1.0	max 0.60	max 0.04	max 0.03	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 polished, blue polished and yellow.

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

Straightness Deviation

Strip Width (mm)	Measured Length (3m)
Strip Width (mm)	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

Hardened Tempered Martensitic Stainless Steel Strip

Place of Origin: China

Manufacturer: Hubei Baomit Steel Materials Co., Ltd.

Steel Grade: 420J2

Equivalent Grades: X30Cr13

Supply Condition: Hardened and Tempered (H & T)

Applications: Knives, Valves, Measuring Tapes

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

"Baomit strip steel stands for precision, quality and high performance. Our materials are excellent in terms of comprehensive delivery indicators, such as straightness, flatness, mechanical properties and metallographic uniformity."

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