AISI/SAE 8660 Strip Steel Hardened Tempered Steel Coil

Hardened and tempered strip steel has comprehensive mechanical properties with good strength, hardness and toughness. Baomit production team properly harden and temper carbon steel strips to satisfy the most demanding specifications of different industries.

Parameters	Recommendation
Steel Grade	8660
Brand	BAOMIT
Certification	ISO9001:2015
Hardness	41 – 45 HRC
Surface Finish	White polished, blue polished, yellow polished
Edges	Slit, square or round
Thickness Tolerance	+/- 0.02
Width Tolerance	+/- 0.10
Camber	Max 1mm per 3m

8660 Strip Steel Hardened Tempered Steel Coil

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

Chemical Composition % of Steel SAE8660

C	Si	Mn	Ni	P	S	Cr	Mo
0.56-0.64	0.15-0.35	0.75-1.00	0.40-0.70	max 0.035	max 0.04	0.40-0.60	0.15-0.25

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

SAE8660 Strip Steel Hardened Tempered Steel Coil

Place of Origin: China

Manufacturer: Hubei Baomit Steel Materials Co., Ltd.

Steel Grade: 8660

Equivalent Grades:

Supply Condition: Hardened and Tempered (H & T)

Applications: Sawmill Blades, Bandsaw, Chain Parts

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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