Disc 2Cr13 Lift Check Valve Martensitic Hardened Steel untuk High-Pressure

Kata Kunci Utama: disc 2Cr13 lift check valve, 2Cr13 martensitic stainless steel, hardened disc valve Kata Kunci Turunan: 2Cr13 vs SS304, disc material check valve, tahan abrasi water hammer, heat treatment 2Cr13, lifespan disc valve

Disc 2Cr13 Martensitic Hardened Steel untuk Check Valve

2Cr13 adalah martensitic stainless steel — hardenable (dapat dikeraskan) hingga HRC 40-50 via heat treatment. Disc 2Cr13 pada lift check valve memberikan wear resistance (tahan abrasi 3-5× vs SS304), impact resistance (tahan water hammer), dimensional stability (tidak deformasi high-pressure). Cocok untuk high-pressure, high-cycle, dan steam up to 200°C.

Properties Table 2Cr13 Disc Material

Key advantage: Hardenable — dapat disesuaikan hardness via heat treatment untuk optimize wear vs toughness.

2Cr13 vs SS304 vs SS316 Disc Material Comparison

Buyer sering bertanya: "2Cr13 atau SS304/SS316 untuk disc?" Berikut comparison:

Kapan Pilih 2Cr13?

Kapan Pilih SS304/SS316?

Kesimpulan: For high-pressure, high-cycle check valves, 2Cr13 = better choice (wear resistance + dimensional stability). For highly corrosive, SS316 = better.

Heat Treatment Kenapa 2Cr13 Harus Di-Harden?

2Cr13 annealed (soft) = HRC 20-25 → tidak cocok untuk disc (wear fast, deform).

2Cr13 heat-treated (hardened) = HRC 40-50 → optimal untuk disc.

Heat Treatment Process

1. AUSTENITIZING (1000-1050°C) ↓ Transform to austenite structure

2. QUENCHING (Oil or air) ↓ Rapid cooling → Martensitic structure

3. TEMPERING (200-400°C) ↓ Reduce brittleness, optimize hardness

4. Final Hardness: HRC 40-50

Tempering temperature determines final properties:

• Low-temp temper (200-250°C): HRC 48-52 (maximum hardness, wear resistance)

• Medium-temp temper (300-350°C): HRC 42-46 (balanced hardness + toughness)

• High-temp temper (400-450°C): HRC 38-42 (maximum toughness, impact resistance)

For check valve disc: Typically medium-temp temper (HRC 42-46) — balance wear resistance + toughness untuk handle water hammer.

Kenapa 2Cr13 Tahan Abrasi & Water Hammer?

Tahan Abrasi (Wear Resistance)

Abrasi = material removal dari friction + particles.

2Cr13 hardness HRC 40-50 vs SS304 HRC 15-20:

• Wear rate: 2Cr13 is 3-5× slower than SS304

• Lifespan: 2Cr13 disc 5-10 years vs SS304 2-5 years

Example: Pump discharge check valve (high-velocity water with sand particles) — 2Cr13 disc lasts 8 years, SS304 disc wears out dalam 3 years.

Tahan Water Hammer (Impact Resistance)

Water hammer = shock pressure wave (10-50× normal pressure).

Why 2Cr13 better:

• Martensitic structure = crystalline structure yang absorb impact energy better

• High yield strength (450-650 MPa) = resist deformation

• Toughness (from proper tempering) = tidak brittle

SS304/SS316 (austenitic):

• Lower yield strength (200-300 MPa) = can deform permanently

• Soft (HRC 15-20) = dents, misalignment

Result: 2Cr13 disc maintains sealing integrity after water hammer events — SS304 disc dapat permanently deform.

Aplikasi 2Cr13 Disc Lift Check Valve

NOT recommended for:

• ❌ Highly corrosive (seawater, acids) → use SS316

• ❌ Superheated steam (>200°C) → use 13Cr or SS316

Lifespan Calculation 2Cr13 vs SS304

Example system:

• Lift check valve DN 50

• Pump discharge (10 bar, water + particles)

• Operating: 16 hours/day, 300 days/year

2Cr13 Disc:

• Wear rate: Low (HRC 40-50)

• Cycles before replacement: ~5 million cycles

• Lifespan: 8-10 years

SS304 Disc:

• Wear rate: High (soft, HRC 15-20)

• Cycles before replacement: ~1.5 million cycles

• Lifespan: 3-4 years

Replacement Cost Calculation:

• Disc replacement: Rp 500,000 (labor + parts)

• Over 10 years:

  • 2Cr13: 1× replacement = Rp 500,000

  • SS304: 3× replacement = Rp 1,500,000

• Savings: Rp 1,000,000 (2Cr13 = lower TCO)

Plus reduced downtime (fewer replacements).

Troubleshooting 2Cr13 Disc Issues

FAQ Pertanyaan Umum

Q: Apa itu 2Cr13 dan kenapa dipakai untuk disc check valve?

A: 2Cr13 adalah martensitic stainless steel — hardenable hingga HRC 40-50 (3-5× lebih keras dari SS304). Untuk check valve disc, hardness critical karena disc receive: (1) wear dari open-close cycles, (2) impact dari water hammer. 2Cr13 = wear resistant + impact resistant → lifespan 5-10 tahun vs SS304 2-5 tahun.

Q: Berapa hardness disc 2Cr13 yang optimal?

A: HRC 42-46 (medium-temp temper) adalah optimal untuk check valve disc — balance wear resistance (high hardness) + toughness (handle water hammer). Too hard (HRC >50) = brittle, risk crack. Too soft (HRC <40) = wear fast.

Q: Apakah 2Cr13 lebih baik dari SS304 untuk disc check valve?

A: Untuk high-pressure, high-cycle applications: YES. 2Cr13 punya wear resistance 3-5× better, impact resistance better, dimensional stability better (tidak deform). Tapi untuk highly corrosive fluids, SS316 lebih baik (2Cr13 hanya 13% Cr — corrosion resistance moderate).

Q: Berapa temperature max disc 2Cr13?

A: 200°C — 2Cr13 maintain hardness hingga suhu ini. Cocok untuk saturated steam @ 16 bar. Untuk superheated steam (>200°C), upgrade ke 13Cr atau SS316.

Q: Kenapa 2Cr13 tahan water hammer?

A: Martensitic structure + high yield strength (450-650 MPa) + toughness dari tempering → absorb impact energy tanpa deformasi permanent. SS304/SS316 (soft, yield 200-300 MPa) dapat permanently deform dari water hammer.

Q: Berapa lifespan disc 2Cr13 vs SS304?

A: 2Cr13: 5-10 tahun (high-pressure, high-cycle). SS304: 2-5 tahun (wear faster karena soft). Over 10 years, 2Cr13 = lower TCO (fewer replacements + less downtime).

Konsultasi & Pembelian

Butuh lift check valve dengan disc 2Cr13 untuk high-pressure application?

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Produk Lift Check Valve dengan Disc 2Cr13

• CETO Lift Check Valve PN16 — disc 2Cr13 HRC 42-46

• Body: Cast iron atau cast steel

• Seat: SS304 (metal seat untuk steam)

• Guide: SS (smooth disc movement)

• Pressure: PN16, PN25, PN40

• Size: DN 15 – DN 100

• Application: Pump discharge, boiler feedwater, steam lines

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Keywords: disc 2Cr13 lift check valve, 2Cr13 martensitic stainless steel, hardened disc valve, 2Cr13 vs SS304, disc material check valve, tahan abrasi water hammer, heat treatment 2Cr13, lifespan disc valve

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