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X20CrMo13 is a molybdenum-enhanced martensitic stainless steel offering superior corrosion resistance and high strength after heat treatment. Its excellent wear resistance and mechanical stability make it ideal for shafts, pump components, valve parts, and other mechanical components exposed to moderately aggressive environments. X20CrMo13 provides global B2B buyers a reliable solution for precision engineering and high-performance stainless steel applications.
Keywords: X20CrMo13, 1.4021Mo, EN 20CrMo13, Martensitic Stainless Steel, Mo-alloyed Steel, High Strength Stainless Steel

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Products Description
Product Name: X20CrMo13 Stainless Steel
Standard: EN 1.4021 (with Mo)
Type: Martensitic Stainless Steel
Alias: 20Cr13Mo / EN 1.4037 (similar)
Alloying Element: +Mo (Improved Corrosion & Hardness)
Strength: High (Quenched & Tempered)
Corrosion Resistance: Better than X20Cr13
Wear Resistance: Enhanced
Magnetic: Yes
Applications: Pump Shafts, Valve Components, Mechanical Parts, Turbine Components
Forms: Round Bar / Forged Bar / Flat Bar
Key Feature: Higher corrosion and strength due to molybdenum addition
Chemical Composition (Typical Values, %)
| Element | Content (%) |
|---|---|
| C | 0.16 – 0.25 |
| Si | ≤ 1.00 |
| Mn | ≤ 1.50 |
| P | ≤ 0.040 |
| S | ≤ 0.030 |
| Cr | 12.0 – 14.0 |
| Mo | 0.15 – 0.30 |
| Ni | ≤ 0.60 |
| Fe | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 700 – 900 MPa |
| Yield Strength (Rp0.2) | ≥ 450 MPa |
| Hardness | 200 – 250 HB |
| Elongation | ≥ 10% |
Available Specifications (Metric + Imperial)
| Product Form | Metric (mm) | Imperial (inch) | Tolerances |
|---|---|---|---|
| Round Bar | Ø 6–300 mm | Ø 0.24"–12" | h9 / h10 / h11 |
| Square Bar | 6×6 – 200×200 | 0.24"×0.24" – 8"×8" | ±0.05–0.5 mm |
| Flat Bar | T 3–60 mm, W 20–600 mm | T 0.12"–2.36", W 0.8"–24" | EN / ASTM tolerances |
| Forged Block | 100–600 mm | 4"–24" | On request |
Features & Advantages
✔ Enhanced corrosion resistance due to Mo addition
✔ High hardness after quenching and tempering
✔ Excellent wear resistance for mechanical parts
✔ Good dimensional stability
✔ Suitable for shafts, valves, and pump components
✔ Magnetic, martensitic microstructure
Products Applications
Pump shafts & impellers
Valve components
Mechanical parts exposed to wear
Turbine components
Precision machined shafts and pins
Inspection & Quality Assurance
Mill test certificates (EN 10204 3.1 / 3.2)
Chemical analysis via spectrometer
Mechanical property verification (UTS, YS, hardness)
Ultrasonic testing (UT) and dimensional inspection
Third-party inspection available: SGS / TUV / BV
Looking for high-quality X20CrMo13 stainless steel? Our team provides technical support, precise cutting, and fast worldwide shipping.
Our address
Room 4107, Runfeng Building, Sanqiao New Street, Weiyang District, Xi'an City, Shaanxi Province
Phone Number
+86 15769214734

FAQ
1. What is X20CrMo13?
X20CrMo13 is a molybdenum-enhanced martensitic stainless steel (EN 1.4021Mo) that combines high strength, improved wear resistance, and moderate corrosion resistance, suitable for shafts, pump components, and valve parts.
2. How is X20CrMo13 different from X20Cr13?
X20CrMo13 contains molybdenum (0.15–0.30%) which increases corrosion and wear resistance compared to standard X20Cr13. Both are martensitic and magnetic.
3. Is X20CrMo13 magnetic?
Yes, X20CrMo13 is fully magnetic due to its martensitic microstructure.
4. Can X20CrMo13 be hardened?
Yes. It achieves high hardness after quenching and tempering, making it suitable for high-wear components.
5. Recommended heat treatment process?
Austenitize / Quench: 950–1050°C in oil or air
Tempering: 200–300°C depending on desired hardness and toughness
6. What is the typical hardness after heat treatment?
200–250 HB (Brinell), depending on quenching and tempering parameters.
7. Common applications for X20CrMo13?
Shafts, pins, and mechanical components
Pump shafts and impellers
Valve components
Turbine parts
Precision machined industrial parts
8. What product forms are available?
Round bars, square bars, flat bars, forged blocks. Surface finishes include black, peeled, bright, polished, and centerless ground.
9. Can X20CrMo13 be welded?
Yes, but preheating and post-weld tempering are recommended to avoid cracking due to martensitic structure.
10. Do you offer customized lengths or machining services?
Yes. Cut-to-length, precision machining, and custom tolerances are available based on your project requirements.
11. How to ensure quality and traceability?
All batches come with mill test certificates (EN 10204 3.1/3.2), chemical analysis, mechanical testing, dimensional inspection, and optional third-party verification (SGS / TUV / BV).
12. Does molybdenum affect machinability?
Mo slightly reduces machinability compared to standard X20Cr13, but it significantly enhances corrosion and wear resistance.
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