CAN 4340 steel be hardened?
Induction or Flame Hardening Atlas 4340 can be surface hardened to 58HRC (water quench) or surface hardened to between 53 to 55HRC (oil quench). Tempering at 200°C.
How much carbon is in SAE 4340 steel?
AISI / SAE 4340 Alloy Steel
| Chemical Analysis | |
|---|---|
| C% | Carbon 0.38 – 0.43 |
| Mn% | Manganese 0.6 – 0.8 max |
| P% | Phosphorus 0.035 max |
| S% | Sulfur 0.040 max |
What kind of steel is 4340?
alloy steel
AISI 4340 is a low alloy steel containing nominally 0.4% C, 0.8% Cr, 0.25% Mo and 1.8% Ni. Higher strength levels up to 150 KSI 0.2% PS may be achieved by suitable heat treatment. Often used in preference to AISI 4140 at the higher strength levels because of its better hardenability and improved CVN impact toughness.
Can you through Harden 4140?
4140 is relatively easy to harden. Hardening steels involves the basic process of heating the steel to organize the crystalline structure in a uniform way and then rapidly cooling it by quenching it to lock the molecular make-up of the steel.
Can you harden 4140 steel?
Hardening. AISI 4140 alloy steel can be hardened by cold working, or heating and quenching.
What is the difference between 4140 and 4340 steel?
There is a huge difference between these two alloys chemically, namely the nickel content: 4140 nominally has no Ni and 4340 contains between 1.65 and 2.00 % Ni. This contributes to substantial differences in hardenability and fracture toughness, and also has a positive effect on distortion during quenching and corrosion resistance.
How much carbon is in AISI 4340 steel?
AISI 4140 is versatile because of its simple chemistry and has the following composition: 0.40 % carbon and 0.85 % manganese which offers toughness and can be heat treated and hardened 0.1 % chromium adds to overall toughness but is not enough to be made into stainless steel; 0.25 % molybdenum and small amounts of sulfur, silicon and phosphorous
What is the density of 4340 steel?
The density of steel is in the range of 7.75 and 8.05 g/cm 3 (7750 and 8050 kg/m 3 or 0.280 and 0.291 lb/in 3 ). The theoretical density of mild steel (low-carbon steel) is about 7.87 g/cm 3 (0.284 lb/in 3 ). Density of carbon steels, alloy steels, tool steels and stainless steels are shown below in g/cm 3, kg/m 3 and lb/in 3.
What are the factors of 4340?
SAE AISI 4340 Steel (UNS G43400)