Alloy Steel
Alloy steel is a type of alloy combined with two more metallic elements
to create a stronger and improved version of steel. Molybdenum, manganese, nickel,
chromium, vanadium, silicon, and boron are some of the most common and widely used
metallic elements to create steel alloys.
Depending on the need and requirements of your project, the composition of steel
alloy may vary. At Metals Cut4U, we offer custom-cut metal services to give the
desired shape and pattern to metal sheets. To learn more about our services, call us
at 440-822-6381.
What Are Steel Alloy Composition?
Iron and carbon together make steel. To enhance the properties of steel, the alloy is further mixed with different metal elements. Here are some popular metallic elements mixed to create different steel alloy compositions.
Magnesium
Magnesium is the most preferred metal to increase the hardness and
stability of a metal structure. Additionally, magnesium is also used to reduce the
corrosion rate and increase the toughness of the metal.
Nickel
Similar to magnesium, nickel is used to increase the strength and
toughness of the metal structure. This element is an austenite stabilizer that helps
in improving corrosion resistance and oxidizing properties.
Titanium
Titanium is considered one of the strongest and toughest metals on the
earth. Mixing titanium with steel can help you create a standard quality and durable
alloy for your construction and other project purposes.
Copper
Generally, a small amount of copper is mixed with steel to improve the
rust and corrosion resistance properties. An excessive amount of copper can make it
difficult to wield and have adverse effects on the final product.
Chromium
Chromium is the most preferred element to enhance the toughness and
hardness of steel at high temperatures. Compared to other metals, chromium can
withstand high-temperature and create desired results without losing its essential
properties during the process.
Aluminum
Aluminum is a non-ferrous metal that is naturally resistant to rust and
corrosion. Mixing aluminum can help you achieve excellent lightweight steel alloy
composition.
Silicon
Silicon can be used to purify the metal and improve oxidation resistance
in the metal.
Specification of Alloy Steel
| Grade | Specification | |
|---|---|---|
| AISI4130 | AMS 2301, 6370, 6348, MIL-S-6758 | |
| AISI4140 | AMS 2301, 6382, 6349, MIL-S-5626 | |
| 4330 | AMS 2301, 6427, MIL-S-8699, BMS-7-27 | |
| AS4330 | AMS 6427, 6411, MIL-S-8699, BMS-7-27, Melt, N&T AMS 2300, BMS-7-122 | |
| AISI4340 | AMS 2301, 6409, 6415, MIL-S-5000, BMS 7-28, DMS-1555 | |
| 9310 | AMS 2300, 6260, 6267, 6265, MIL-S-7393C | |
| 52100 | AMS 2301, 6440, MIL-S-7420 | |
Alloy Steel Composition
| AISI | UNS | C (max) |
Mn (max) |
P (max) |
S (max) |
Si | Cr | Ni | Cu | Others |
|---|---|---|---|---|---|---|---|---|---|---|
| 405 | S40500 | 0.08% | 1% | 0.04% | 0.03% | 1% | 11.5-14.5% | - | - | 1-3% Aluminum |
| 430 | S43000 | 0.12% | 1% | 0.04% | 0.03% | 1% | 16-18% | - | - | - |
Properties of Low Alloy Steel
| AISI | UNS | Typical Mechanical Strength | ||||
|---|---|---|---|---|---|---|
| Tensile (ksi) |
Yield (ksi) |
Elongation (% in 2″) |
Reduction of Area (%) |
Brinell Hardness |
||
| 4130 | G41300 | 80 | 56 | 28 | 57 | 149 |
| 4140 | G41400 | 150 | 90 | 20 | 45 | 285 |
| 4330 | G43300 | 125 | 100 | 15 | 30 | 250-325 |
| 4340 | G43400 | 110 | 66 | 23 | 49 | 197 |