Widely Contruction Use Special Hot Rolled Polished SAE8620 Flat Bar
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.
1) Demand has high yield strength, tensile strength and fatigue
strength, there has enough plasticity
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;
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;
Round bar dia 20-100mm black surface and hot rolled deliver
Full size flat bars
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
then hardness can reach above 48 HRC;
1) EAF:Electric Furnace+LF+VD (Optional);
2) ESR:Electric Furnace+LF+VD+Eleroslag Remelted (Optional);
Packed with plastic film, seaworthing packing, others according to
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!
- 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 3rd party inspection is accept.
- Low MOQ request
- TT, LC payment are both accepted
- High quality, you won’t have any quality problems