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Alloy steel is a high-performance material engineered by combining carbon steel with various alloying elements such as chromium, molybdenum, nickel, vanadium, and manganese. These additions enhance its mechanical properties, including strength, toughness, wear resistance, and corrosion resistance, making it suitable for critical and high-stress applications across oil & gas, aerospace, automotive, power generation, and construction industries.
Available in grades like A182 F5, F9, F11, F22, and F91, alloy steel delivers superior performance under extreme temperatures and pressures. It offers excellent hardenability, fatigue strength, and impact resistance. Conforming to international standards such as ASTM, ASME, and DIN, alloy steel is integral to the development of heavy-duty and long-lasting engineering components.
Available forms are Alloy Steel Pipes & Tubes, Alloy Steel Sheets & Plates, Alloy Steel Pipe Fittings, Alloy Steel Fasteners, Alloy Steel Flanges.
Alloy Steel Pipes & Tubes
Standard: ASTM A/ASME SA335, A213, A691
Size: 1/8″ NB to 26″ NB
Grade: Gr. P5, P9, P11, P12, P21, P22 & P91; ASTM A213 – T5, T9, T11, T12, T22, T91; ASTM A691
Alloy Steel Pipe Fittings
Standard: ASTM A403 / ASME SA403, A234 WP series
Size: 1/8″ NB to 48″ NB
Grade: WP1, WP5, WP9, WP11, WP22, WP91
Alloy Steel Sheets & Plates
Standard: ASTM / ASME A/SA 387
Thickness: 5 mm to 200 mm
Width: 1000 mm to 2500 mm
Length: 2500 mm to 12,500 mm
Form: Coils, foils, shim sheets, perforated sheets, strips, flats, blanks (circle), rings (flange)
Grade: A387 F5, F9, F11, F12, F22, F91
Alloy Steel Fasteners
Standard: ASTM / ASME A/SA 193 / 194
Size: M02 to M33 | Custom sizes
Length: Up to 5 meters
Grade: B6, B7, B7M, B16, 2, 2HM, 2H, GR 6, B7, B7M
Alloy Steel Flanges
Standard: ASTM A182 / ASME SA182
Size: 1/2″ to 36″
Pressure Ratings: 150#, 300#, 400#, 600#, 900#, 1500#, 2500#; PN6, PN10, PN16, PN25, PN40, PN64
Grade: F5, F9, F11, F12, F22, F91
Alloy Steel Angles
Size: 1 mm to 250 mm Width; 100 mm to 6000 mm Length
Grade: ASTM A182 – F5, F9, F11, F12, F21, F22, F91
Alloy Steel Round Bars
Range: 1 mm to 250 mm OD; 100 mm to 6000 mm Length
Grade: ASTM A182 – F5, F9, F11, F12, F21, F22, F91
Alloy Steel Forged Fittings
Size: 1/2″ to 48″ NB & OD (15 NB to 600 NB)
Grade (Alloy Steel): ASTM / ASME A182 – F5, F9, F11, F12, F21, F22, F91
Grade (Carbon Steel): ASTM / ASME A105, ASTM A350 LF2 GR X42/46/52/56/60/65/70, IS 2062, IS 2002
Alloy Steel Valves
Standards: API 600 / BS 1414, API 598 / BS EN 12266‑1, ASME B16.10, B16.5, B16.25, B16.34
Size: 1/8″ to 16″
Rating: 150#, 300#, 600#, 800#, 1500#
End Connection: Screwed (NPT), Socket Weld, Flanged End, Screwed Parallel, Screwed Taper
| Element | P5 (%) | P9 (%) | P11 (%) | P22 (%) | P91 (%) |
|---|---|---|---|---|---|
| Carbon (C) | 0.15 max | 0.15 max | 0.05–0.15 | 0.05–0.15 | 0.08–0.12 |
| Manganese (Mn) | 0.30–0.60 | 0.30–0.60 | 0.30–0.60 | 0.30–0.60 | 0.30–0.60 |
| Phosphorus (P) | 0.025 max | 0.025 max | 0.025 max | 0.025 max | 0.02 max |
| Sulfur (S) | 0.025 max | 0.025 max | 0.025 max | 0.025 max | 0.01 max |
| Silicon (Si) | 0.50 max | 0.50 max | 0.50 max | 0.50 max | 0.20–0.50 |
| Chromium (Cr) | 4.00–6.00 | 8.00–10.00 | 1.00–1.50 | 1.90–2.60 | 8.00–9.50 |
| Molybdenum (Mo) | 0.45–0.65 | 0.90–1.10 | 0.44–0.65 | 0.87–1.13 | 0.85–1.05 |
| Vanadium (V) | — | — | — | — | 0.18–0.25 |
| Niobium (Nb) | — | — | — | — | 0.06–0.10 |
| Nitrogen (N) | — | — | — | — | 0.03–0.07 |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HBW) |
|---|---|---|---|---|
| P5 | ≥ 415 | ≥ 205 | ≥ 30 | ≤ 163 |
| P9 | ≥ 415 | ≥ 205 | ≥ 30 | ≤ 163 |
| P11 | ≥ 415 | ≥ 205 | ≥ 30 | ≤ 163 |
| P22 | ≥ 415 | ≥ 205 | ≥ 30 | ≤ 163 |
| P91 | ≥ 585 | ≥ 415 | ≥ 20 | 190 – 250 |