What does AISI4340 means?
As we know, the kind of steel materials is innumerable. I’d like to share the AISI4340 with you, AISI4340 is nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition. It has very good fatigue resistance, also, it maintaining wear resistance. Let’s talk about the application about the 4340, it’s mainly applying in Commercial and military aircraft, automotive systems, forged hydraulic and other machine tool applications, forged steel crankshafts.
The demand of the AISI4340 is huge in South America and North America, especially in South America, we receive many emails about order inquiry every year, we have many clients in South America, they are very interested in AISI4340, and once order, try again .we have good relationship with our clients, we’ll visit our clients every year for further cooperation. also, clients will arrange a schedule to visit our mill, so we are familiar with each other.
| 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 |
| Si% | Silicon 0.15 – 0.3 |
| Ni% | Nickel 1.65 – 2.0 |
| Cr% | Chromium 0.7 – 0.9 |
| Mo% | Molybdenum 0.2 – 0.3 |

In this new social environment, the Chinese steel industry in the process of foreign trade, to the actual situation and the basic status quo in the industry to analyze and judge. in the process of export trade, it can easily meet the challenges and difficulties in the international environment. At the same time according to the domestic market situation of policy changes and restructuring, it is needed to improve the trade environment.
COMPOSITION

H13 steel equivalent
h13 tolerance :