Alloy Steel grades at a glance with ASTM specification and equivalent chart
Alloy steel properties exhibit variations across different alloys, representing a vast category with numerous materials serving diverse purposes. Various alloy steel grades are defined by distinct compositions within these alloys, wherein alloying materials constitute between 1% to 50% of the total weight composition. The alloys are broadly classified into two subgroups: low alloy steel, featuring lower amounts of alloying material, and high alloy steel, characterised by higher alloying material content. The specific quantity defining what qualifies as “low” or “high” remains undefined. Alloy steel finds applications across a wide spectrum of industrial, domestic, and commercial scenarios, ranging from household and kitchen accessories to larger industrial machine parts, leveraging the materials for their strength and cost-effectiveness. Each alloy possesses unique properties applied in specific applications. The advantages of alloy steel lie in its capacity to substitute high-cost materials through slight adjustments in chemical composition, significantly reducing costs. Alloy steel, along with its types, is categorised based on composition, and the pricing is per kilogram. The alloy steel price per kg is notably lower compared to other metal alloys or pure metals like titanium and copper. Suppliers of alloy steel typically offer these products in conjunction with other metal items, making alloy steel one of the most widely sold metallic products globally. The composition of alloy steel can encompass various elements, including manganese, molybdenum, chromium, nickel, silicon, nitrogen, and others, contingent on the specific material. As one of the leading alloy steel manufacturers in India, you can expect the best pricing from us.
Types of Alloy Steel
Chrome Molybdenum Alloy Steel
Uses & Application | Boilers, and other equipments, suitable for high temperature |
Common Grades | ASTM A387 Grade 5/ 11/ 12/ 9/ 91/ 22, ASTM A204, ASTM A302, SAE 4130, AISI 4140, SAE 8620, EN 36, EN 19, EN 24, EN 10028 -2 / DIN 17175 |
Supply Condition | Annealed / Normalized, Tempered |
Alloy Steel ASTM Standard
Pipes | Fttg | Flg | Valves | Bolts and Nuts |
ASTM A335 Grade P1 | A234 Grade WP1 | A182 Grade F1 | A217 Grade WC1 | A193 Grade B7 A194 Grade 2H |
ASTM A335 Grade P11 | A234 Grade WP11 | A182 Grade F11 | A217 Grade WC6 | |
ASTM A335 Grade P12 | A234 Grade WP12 | A182 Grade F12 | A217 Grade WC6 | |
ASTM A335 Grade P22 | A234 Grade WP22 | A182 Grade F22 | A217 Grade WC9 | |
ASTM A335 Grade P5 | A234 Grade WP5 | A182 Grade F5 | A217 Grade C5 | |
ASTM A335 Grade P9 | A234 Grade WP9 | A182 Grade F9 | A217 Grade C12 | |
ASTM A335 Grade P91 | A234 Grade WP91 | A182 Grade F91 | – |
Alloy Steel Specification
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 Temperature Range
Low Alloy (Temp range -29° C to 593° C):
- Carbon 1/2% Moly and Manganese 1/2% Moly : above 700 degree F
- 1 1/4% Chrome 1/2% Moly & 1% chrome 1/2% Moly
- 3% chrome 1% Moly & 2 1/4 Chrome 1% Moly
- 5% chrome 1/2% Moly : above 550 degree F
- 9% Chrome 1% Moly
Low Alloy Steel Applications & Uses
- Structural applications
- Aircraft
- Power transmissions
- Structural parts
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% | – | – | – |
Alloy Steel Properties
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 |