**Steel Grades, Chemical Compositions, and Mechanical Properties of Steam Turbine Blades**
**Steel Grades and Chemical Compositions for Steam Turbine Blades**
Below is a detailed table showing the chemical compositions of various steel grades used in steam turbine blades:
**Notes:**
1. The 1Cr16Ni4Cu4Nb grade contains no more than 0.050% aluminum, 0.05% titanium, and 0.05% nitrogen. Under conditions that meet mechanical properties, chromium content can reach up to 16.50%.
2. For the 0Cr16Ni4Cu4Nb grade, phosphorus and sulfur contents are not more than 0.035% and 0.030%, respectively. Other grades have phosphorus and sulfur contents not exceeding 0.030%.
3. All values refer to mass fraction.
---
**Heat Treatment System for Steel Used in Steam Turbine Blades**
| Brand | Quenching / °C | Tempering / °C | High Temperature Tempering / °C | Cooling Method |
|-------|----------------|----------------|----------------------------------|----------------|
| 1Cr13 | 800–900, slow cooling | 700–770, fast cooling | 950–1000, oil | 700–750, air |
| 1Cr12 | 800–900, slow cooling | 700–770, fast cooling | 980–1040, oil | 660–770, air |
| 2Cr13 | 800–900, slow cooling | 700–770, fast cooling | 950–1020, oil or air | 660–770, oil/water/air |
| 1Cr12Mo | 800–900, slow cooling | 700–770, fast cooling | 950–1000, oil | 650–710, air |
| 1Cr11MoV | 800–900, slow cooling | 700–770, fast cooling | 1000–1050, oil/air | 700–750, air |
| 1Cr12W1MoV | 800–900, slow cooling | 700–770, fast cooling | 1000–1050, oil | 680–740, air |
| 2Cr12MoV | 880–930, slow cooling | 750–770, fast cooling | 1020–1070, oil | 680–740, air |
| 2Cr12Ni1Mo1W1V | 800–900, slow cooling | 700–770, fast cooling | 1020–1060, oil | 660–720, air |
| 2Cr12NiMo1W1V | 860–930, slow cooling | 750–770, fast cooling | 980–1040, oil | 650–750, air |
| 0Cr16Ni4Cu4Nb | Solid solution treatment (1020–1060°C, air cooled) | Precipitation hardening (600–700°C) | — | — |
**Note:** The air cooling rate should be at least 14°C/min.
---
**Mechanical Properties of Steel for Steam Turbine Blades**
| Brand | Heat Treatment Method | Mechanical Properties | Annealed or High-Temperature Tempered Steel Hardness (HBS) |
|-------|----------------------|------------------------|----------------------------------------------------------|
| | | σ₀.₂ (MPa) | σ_b (MPa) | δ (%) | ψ (%) | AK (J) | HBS |
| 1Cr13 | Quenching and tempering | ≥345 | 540 | 25 | 55 | 78 | ≥159 ≤200 |
| 1Cr12 | Quenching and tempering | ≥440 | 615 | 20 | 60 | 71 | 187–229 ≤200 |
| 2Cr13 | Quenching and tempering | ≥490 | 655 | 16 | 50 | 63 | 207–241 ≤223 |
| 1Cr12Mo | Quenching and tempering | ≥550 | 685 | 18 | 60 | 78 | 217–248 ≤255 |
| 1Cr11MoV | Quenching and tempering | ≥490 | 685 | 16 | 55 | 47 | 269–302 ≤200 |
| 1Cr12W1MoV | Quenching and tempering | ≥590 | 735 | 15 | 45 | 47 | 269–302 ≤223 |
| 2Cr12MoV | Quenching and tempering | ≥600 | — | 15 | 50 | 47 | 241–285 ≤223 |
| 2Cr12Ni1Mo1W1V | Quenching and tempering | ≥735 | 880 | 14 | 42 | 47 | — ≤255 |
| 2Cr12NiMo1W1V | Quenching and tempering | ≥760 | 930 | 12 | 32 | — | 277–311 ≤255 |
| 0Cr16Ni4Cu4Nb | Precipitation hardening | 590–755 | 890 | 16 | 55 | — | 262–302 ≤361 |
**Notes:**
1. The heat-treated sample has a blank size of 25 mm, and the steel was heat-treated with an original size less than 25 mm.
2. The mechanical properties listed apply to steels with a cross-sectional dimension ≤ 60 mm.
3. These materials are suitable for manufacturing steam turbine and gas turbine blades.
*Source: http://news.chinawj.com.cn*
*Editor: Hardware Business Network Information Center*
Brand |
Chemical Composition (mass fraction) (%) |
||||||||
C |
Si |
Mn |
Ni |
Cr |
Mo |
W |
V |
Cu |
|
1Cr13 |
≤0.15 |
≤1.00 |
≤1.00 |
≤0.60 |
11.50–13.0 |
— |
— |
— |
— |
1Cr12 |
0.10–0.15 |
≤0.60 |
≤0.60 |
≤0.60 |
11.50–13.00 |
— |
— |
— |
≤0.30 |
2Cr13 |
0.16–0.24 |
≤0.60 |
≤0.60 |
≤0.60 |
12.00–14.00 |
— |
— |
— |
|
1Cr12Mo |
0.10–0.15 |
≤0.50 |
0.30–0.60 |
0.30–0.60 |
11.50–13.00 |
0.30–0.60 |
— |
— |
|
1Cr11MoV |
0.11–0.18 |
≤0.60 |
≤0.60 |
10.00–11.50 |
0.50–0.70 |
— |
0.25–0.40 |
||
1Cr12W1MoV |
0.12–0.18 |
0.50–0.90 |
0.40–0.50 |
11.00–13.00 |
0.50–0.70 |
0.70–1.10 |
0.15–0.30 |
||
2Cr12MoV |
0.18–0.23 |
0.30–0.80 |
0.30–0.50 |
11.00–12.50 |
0.80–1.20 |
— |
0.25–0.35 |
||
2Cr12Ni1Mo1W1V |
0.15–0.21 |
0.50–0.90 |
0.80–1.20 |
11.00–13.00 |
0.70–1.10 |
0.75–1.05 |
0.15–0.30 |
— |
|
2Cr12NiMo1W1V |
0.20–0.25 |
0.50–1.00 |
0.50–1.00 |
11.00–12.50 |
0.90–1.25 |
0.90–1.25 |
0.20–0.30 |
0.30 |
|
0Cr16Ni4Cu4Nb |
≤0.055 |
≤1.00 |
≤0.50 |
3.80–4.50 |
15.00–16.00 |
Nb+Ta: 0.15–0.35 |
— |
3.00–3.70 |
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