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MWalloys supplies a broad portfolio of alloy steels—including chromium‑molybdenum (AISI 4140, 4340), nickel‑chromium‑molybdenum (8620), chromium‑vanadium (CR‑V), bearing steels (52100), and ultra‑high‑strength (300M)—in bars, plates, sheets, coils, wires, pipes and forgings. Our alloy steels combine superior toughness, wear resistance and machinability for demanding applications in automotive, oil & gas, tooling, machinery and structural industries.
Full Specifications & Parameters
| Grade | Chem. Composition (%)* | Tensile (MPa) | Yield (MPa) | Elongation (%) | Size Range | Forms Available | Weight (kg/unit)** | Typical Applications |
|---|---|---|---|---|---|---|---|---|
| 4140 | C 0.38–0.43, Si 0.15–0.35, Mn 0.75–1.00, Cr 0.80–1.10, Mo 0.15–0.25 | 655–895 | 415–655 | ≥20 | Ø5 mm–Ø200 mm; 2 mm–150 mm plate | Rods, plates, bars, forgings | 0.04–140 (rod kg/m) | Shafts, gears, hydraulic components |
| 4340 | C 0.38–0.43, Mn 0.60–0.80, Si 0.15–0.35, Ni 1.65–2.00, Cr 0.70–0.90, Mo 0.20–0.30 | 745–975 | 470–725 | ≥18 | Ø5 mm–Ø150 mm; 3 mm–100 mm plate | Bars, plates, forgings | 0.04–110 | Aircraft landing gear, crankshafts |
| 8620 | C 0.18–0.23, Si 0.15–0.35, Mn 0.70–1.00, Ni 0.40–0.70, Cr 0.40–0.65, Mo 0.15–0.25 | 450–620 | 275–415 | ≥16 | Ø6 mm–Ø120 mm; 4 mm–80 mm plate | Bars, coils, shafts | 0.06–60 | Case‑hardened gears, shafts |
| 52100 | C 0.98–1.10, Si 0.15–0.35, Mn 0.25–0.45, Cr 1.30–1.60 | 740–860 | 480–600 | ≥12 | Ø3 mm–Ø80 mm; 2 mm–50 mm plate | Bearing rings, wires | 0.02–30 | Bearings, rollers, bushings |
| 300M | C 0.25–0.35, Mn 0.20–0.40, Si 0.15–0.35, Cr 1.30–1.70, Ni 1.30–1.70, Mo 0.30–0.60 | 1370–1650 | 1240–1480 | ≥10 | Ø10 mm–Ø100 mm; 5 mm–50 mm plate | Bars, shafts, forgings | 0.10–80 | Landing‑gear, drive shafts |
* Typical ranges; consult MTR for exact values.
** Weight per meter of round bar or per square meter of plate.
Why Choose MWalloys
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Diverse Alloy Range: From general‐purpose 4140 to specialty 300M, one supplier for all your alloy steel needs.
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Accredited Quality: ISO 9001, ASTM A29/A29M certification; 100% traceable mill test reports.
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Precision Processing: CNC machining, heat treatment, surface grinding & finishing available.
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Expert Support: Metallurgists on‑staff to advise on material selection and performance.
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Global Delivery: Export experience to 50+ countries with reliable lead times and competitive pricing.
Logistics & Ordering
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Lead Time: 2–5 weeks after PO confirmation
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Packaging: Bundles, wooden crates, plastic wrapping—customizable for export
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Shipping Terms: FOB, CIF, EXW, DDP available
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Order Steps:
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Submit grade, form & dimensions to sales@MWalloys.com
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Receive quotation & proforma invoice
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Confirm order & arrange deposit
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Production → Inspection → Dispatch → Tracking updates
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FAQs
| Q | A |
|---|---|
| What heat treatments are offered for alloy steels? | Quenching & tempering, normalizing, oil‐hardening, annealing. |
| Can you supply cut‑to‑length bars and plates? | Yes—custom lengths & profiles per drawing. |
| Do you provide material certifications? | MTRs per ASTM A29/A29M; 3.1/3.2 inspection reports available. |
| Are alloy steel forgings available? | Yes—open‐die & closed‐die forgings in most grades. |
| How is dimensional accuracy guaranteed? | Precision CNC machining & laser measurement, tolerance to ±0.1 mm. |
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