Alloy Steel/

Alloy Steel

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 & ApplicationBoilers, and other equipments, suitable for high temperature
Common GradesASTM 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 ConditionAnnealed / Normalized, Tempered

Alloy Steel ASTM Standard

PipesFttgFlgValvesBolts and Nuts
ASTM A335 Grade P1A234 Grade WP1A182 Grade F1A217 Grade WC1A193 Grade B7
A194 Grade 2H
ASTM A335 Grade P11A234 Grade WP11A182 Grade F11A217 Grade WC6
ASTM A335 Grade P12A234 Grade WP12A182 Grade F12A217 Grade WC6
ASTM A335 Grade P22A234 Grade WP22A182 Grade F22A217 Grade WC9
ASTM A335 Grade P5A234 Grade WP5A182 Grade F5A217 Grade C5
ASTM A335 Grade P9A234 Grade WP9A182 Grade F9A217 Grade C12
ASTM A335 Grade P91A234 Grade WP91A182 Grade F91

Alloy Steel Specification

GradeSpecification
AISI4130AMS 2301, 6370, 6348, MIL-S-6758
AISI4140AMS 2301, 6382, 6349, MIL-S-5626
4330AMS 2301, 6427, MIL-S-8699, BMS-7-27
AS4330AMS 6427, 6411, MIL-S-8699, BMS-7-27, Melt, N&T AMS 2300, BMS-7-122
AISI4340AMS 2301, 6409, 6415, MIL-S-5000, BMS 7-28, DMS-1555
9310AMS 2300, 6260, 6267, 6265, MIL-S-7393C
52100AMS 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

AISIUNSC
(max)
Mn
(max)
P
(max)
S
(max)
SiCrNiCuOthers
405S405000.08%1%0.04%0.03%1%11.5-14.5%1-3%
Aluminum
430S430000.12%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

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Office Address

17/A, PLOT-318 B,
KANTA BUILDING, M. S. ALI ROAD GRANT ROAD (E),
MUMBAI - 400 007