Polished SAE 8620 Tool Steel , Alloy Steel Flat Bar Double Vacuum Smelting

Widely Contruction Use Special Hot Rolled Polished SAE8620 Flat Bar Alloy Steel

20CrNiMo AISI, former U.S. Department of steel in SAE 8620 steel. Hardenability is similar to that of 20CrNi steel.

Although the Ni content in the steel is half 20CrNi steel, but due to the addition of a small amount of Mo element, the upper part of Austenite Isothermal Transformation Curve to the right; and because the appropriate increase of Mn content in the steel hardenability is still good, high strength than 20CrNi steel.
 

Chemical Composition

Feature:

1) Demand has high yield strength, tensile strength and fatigue strength, there has enough plasticity
and toughness;
2) Demanding by refining outside the furnace, vacuum electroslag remelting or processing, or double vacuum smelting, vacuum induction furnace smelting suitable heat treatment;
3) Corrosion resistant steel, heat-resistant steel, wear-resistant steel, magnetic steel, and other
special physical and chemical properties of the steel;
 

Application:

1) Zinc, aluminum, magnesium and other alloy die-casting molds;
2) Heat dies and all kinds of hot forged molds;
3) Metal extrusion die holder;
 

Ready Stock:

Round bar dia 20-100mm black surface and hot rolled deliver condition.

Full size flat bars

Heat Treatment

1) Preheating 2-4 hours in 500-600°C;
2) Keeping temperature for 2 hours in 850-880°C;
3) Oil cooling to reach 50-100°C;
4) After quenching can reach a hardness of 50-52HRC, then tempered at 200°C,
then hardness can reach above 48 HRC;
 

Melting Process

1) EAF:Electric Furnace+LF+VD (Optional);
2) ESR:Electric Furnace+LF+VD+Eleroslag Remelted (Optional);
 

Packaging Details:

Packed with plastic film, seaworthing packing, others according to customers' requirements;
 

Delivery time:

For abundant stock, 15-20 days.For customized products, 30-50 days.

All the sizes as require can be customerized as fresh production with MOQ,products of required specifications can be developed/produced per international, chinese or industry standards, or based on agreements with customers.

About Guangzhou Changfeng Steel

We have large-sized vertical saw machines, horizontal saw machines, milling machines, grinding machines and other advance equipment, exporting our products by wholesales and retail sales, big plate or flat, round bar are all available.

All our products can meet the standards of DIN, AISI, JIS and GB, all the material should be inspected the ultrasonic, hardness and others strict inspection process before the shipment!

We provide competitive price and fast shipment to make your business become booming and booming!

Our Advantages

• We are a stockist who have a lot of stocks all the time, we can arrange fast shipment
• All products 100% pass UT test before the shipment.
• The 3^rd party inspection is accept.
• Low MOQ request
• TT, LC payment are both accepted
• High quality, you won’t have any quality problems