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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Sheet & Plate > Aisi 420 Grade Stainless Steel

Aisi 420 Grade Stainless Steel

Name: Aisi 420 Grade Stainless Steel
Brand: Yaoteng
SKU: 105877469
Availability: InStock

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US$ 1.5 - 2.5 MOQ: 1 Metric Ton

Key Specifications

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Standard:

AISI, ASTM, BS, DIN, GB, JIS

Grade:

alloy steel

Thickness:

10-300mm

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Dongguan City Yaoteng Special Steel Co., Ltd.

Payment & Shipping

Payment Methods:

Port of Shipment:

Shenzhen Guangzhou

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
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Standard AISI, ASTM, BS, DIN, GB, JIS

Grade alloy steel

Thickness 10-300mm

Place of Origin Guangdong, China

Brand Name Yaoteng

Model Number aisi420

Type Steel Plate

Technique Hot Rolled

Surface Treatment Other, black/bright surface

Application Other, tool steel

Special Use High-strength Steel Plate

Width 80-2300

Length 2000-5800mm

aisi 420 grade stainless steel

420 stainless tool steel in round bar, flat bar and plate in full lengths or bandsaw cut. 420 is a chromium alloyed stainless plastic mould steel, which is characterised by good polishability, good hardenability with high hardness achievable after heat treatment. The steel has fair corrosion resistance giving this plastic mould stainless steel grade suitability for applications requiring good hygiene in industries such as medical and optical.

AISI ASTM A681 DIN 17350 BS EN ISO 4957

Typical Analysis

Carbon	0.40%	Silicon	0.75%
Manganese	0.50%	Chromium	13.50%

Specification:

Round bar	Diameter(mm)	Length (mm)
Round bar	10~500	2000~5800
plate/sheet	Thickness(mm)	Width (mm)	Length (mm)
plate/sheet	10~400	80~2300	2000~5800

round bar, flat bar and plate. Diameters can be sawn to your required lengths as one offs or multiple cut pieces. Rectangular pieces can be sawn from flat bar or plate to your specific sizes. Ground tool steel bar can be supplied, providing a quality precision finished bar to close tolerances.

Applications

420 stainless steel is ideally suited for plastic moulds, acid aggressive plastics, PVC or acetates and can be used with plastics containing abrasive fillers. 420 is suitable to produce components for medical and optical applications where a high surface finish is required.

Forging

420 plastic mould stainless steel can be forged by heating slowly and uniformly to 1000°C. After forging cool slowly in furnace or thermoinsulating material.

Annealing

420 is commonly supplied in the annealed condition. Re-annealing will only be necessary if the steel has been forged or hardened. To anneal heat slowly to 780°C. Cool slowly in furnace to 600°C and then cool in air.

Stress Relieving

When heavy machining or grinding of 420 plastic mould stainless steel has been carried out it is advisable to stress relieve in order to minimise the danger of distortion or cracking during the subsequent heat treatment. To stress relieve, heat the tools slowly to 650°C, soak for a minimum of two hours per 25mm of section and allow to cool down in the furnace to 500°C then continue to cool freely in air. The tools can then be finish machined, leaving on an allowance for final grinding after hardening and tempering.

Hardening

Pre heat the 420 stainless steel to 600-700°C until heated through. Continue heating the 420 to the final hardening temperature of 980-1050°C ensuring that the component is heated through. Protect the 420 component against decarburisation by using a neutral salt bath, controlled atmosphere furnace or vacuum. Air cool or quench in oil.

Tempering

Heat uniformly and thoroughly to the selected tempering temperature and hold at heat for one hour per 25mm of total thickness. Double tempering is recommended. To achieve the best permutation of hardness, toughness and corrosion resistance it is recommended to temper at 250°C.

Temperature [°C]	100	200	300	400	500	600
Hardness [HRc]	56	54	52	54	53	34

Heat Treatment

Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of 420 stainless tool steel.

Final Grinding

Select the correct grade of wheel in consultation with the grinding wheel manufacturer. Ensure the grinding wheel is in good condition by means of a suitable dressing tool. Wet grinding is a preferable option using a copious supply of coolant. If dry grinding is resorted to then use a very soft wheel.

Contact Information: Mobile&WhatsApp:+86-15989907254 Skype:sophia.zhou306

Email:sophia(at)

Packaging & Shipping

Our Packing is easily loading and unloading. The way of packing has been widely loved by clients.And it can be customized.

Container condition:20'GP: maximum length≤5800mm, maximum weight 25 mts

40'GP: maximum length≤11800mm, maximum weight 25mts