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440 9Cr18 centerless grinding round bars

440 9Cr18 centerless grinding round bars

440 9Cr18 General cold work die steel with good machinability,to be made die casting mold,extrusion and injection mold and ejector pins,ejector sleeve,punches,block gauge,measuring tools.
High wear resistance,high toughness,small deformation caused by heat treatment.
Have a high and uniform hardness after heat treatment,heat resisting,resistance to high temperature oxidation,good toughness,machinability and weldability.
Annealing ≤HB269

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Products:

Have wear resistance and corrosion resistance, high hardness and lower price.

Application:

It is suitable for all kinds of precision machinery, bearing, electrical equipment.

Delivery diameter: 2.0mm-50.0mm

Delivery Length: 1000mm - 6000mm

Delivery hardness: ≤269HB

Delivery Specification and Technical Condition

Coil

Size mm	Tolerance mm	Ovality mm
Φ1.5-Φ3.0	±0.01	≤0.01
Φ3.1-Φ6.0	±0.015	≤0.015
Φ6.1-Φ16.0	±0.018	≤0.018
Φ16.1-Φ20.0	±0.02	≤0.020
Φ20.1-Φ25.0	±0.03	≤0.030

Cold Drawing Round Bar

Size mm	Tolerance mm	Straightness mm/m	Ovality mm
Φ2.0-Φ4.0	±0.01	≤0.50	≤0.01
Φ4.1-Φ6.0	±0.015	≤0.70	≤0.015
Φ6.1-Φ13.0	±0.02	≤0.70	≤0.02
Φ13.1-Φ18.0	±0.025	≤0.70	≤0.025
Φ18.1-Φ25.0	±0.030	≤0.70	≤0.03
Φ25.1-Φ50.0	±0.05	≤0.70	≤0.05

Centerless Grinding Round Bar (Annealing condition)

Size mm	Tolerance mm	Straightness mm/m	Ovality mm
Φ2.0-Φ4.0	±0.01	≤0.50	≤0.01
Φ4.1-Φ6.0	±0.01	≤0.50	≤0.01
Φ6.1-Φ13	±0.01	≤0.50	≤0.01
Φ13.1-Φ18.0	±0.015	≤0.50	≤0.015
Φ18.1-Φ25.0	±0.015	≤0.50	≤0.015
Φ25.1-Φ35.0	±0.02	≤0.50	≤0.02
Φ35.1-Φ50.0	±0.03	≤0.50	≤0.03

Peeling Round Bar

Size mm	Tolerance mm	Straightness mm/m	Ovality mm
Φ5.0-Φ13.0	±0.04	≤0.60	≤0.04
Φ13.1-Φ20.0	±0.04	≤0.70	≤0.04
Φ20.1-Φ35.0	±0.5	≤0.70	≤0.05
Φ35.1-Φ60.0	±0.06	≤0.80	≤0.06
Φ60.1-Φ80.0	±0.07	≤0.80	≤0.07
Φ80.1-Φ120.0	±0.08	≤1.00	≤0.08

Product Tag:

9Cr18 centerless grinding round bars Stainless steel 440

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