Alloy Steel

Alloy steel is a type of steel alloyed with several elements such as molybdenum, manganese, nickel, chromium, vanadium, silicon, and boron. These alloying elements are added to increase strength, hardness, wear resistance, and toughness. The amounts of alloying elements may vary between 1 and 50%. Alloy steels may be classified into two groups: low alloy steel and high alloy steel. The boundary between low alloy and high alloy steel is commonly accepted as 5% alloying element. For all practical purposes in the oil and gas industry, alloy steel means low alloy steel. We are specialized in manufacturing pipe fittings such as reducers, elbow, tee, bend, stub end etc.

Alloy Steel Products

Technical Properties for Alloy Steel

Chemical Composition

Grade C Mn Si S P Cr Mo
A234 WP5 ≤0.15 ≤0.6 ≤0.5 ≤0.04 ≤0.03 4-6 0.44-0.65
A234 WP9 ≤0.15 ≤0.6 1.00 ≤0.03 ≤0.03 8-10 0.90-1.10
A234 WP11 0.05-0.2 0.3-0.8 0.5-1 ≤0.030 ≤0.030 1-1.5 0.44-0.65
A234 WP22 0.05-0.15 0.3-0.6 ≤0.5 ≤0.04 ≤0.04 2-2.5 0.87-1.13
A234 WP91 0.08-0.12 0.3-0.6 0.2-0.5 ≤0.02 ≤0.015 8-9.5 0.85-1.05

Mechanical Properties

Grade Tensile Strength (Mpa) Yield Strength (Mpa) Elongation %
A234 WP5 415 - 585 ≥205 ≥20
A234 WP9 380 min 585 min ≥30
A234 WP11 415 - 585 ≥205 ≥20
A234 WP22 415-585 ≥205 ≥20
A234 WP91 ≥590 ≥415 ≥20