Stainless Steel Valve Seats
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China [CN] |
Common base material and chemical composition（wt.%）
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Mat
Type
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C
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Si
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Mn
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P
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S
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Cr
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Mo
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Ni
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Cu
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Nb
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Al
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Ti
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Co
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Fe
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4130
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0.28-0.33
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0.15-0.35
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0.4-0.6
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≤0.025
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≤0.025
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0.8-1.1
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0.15-0.25
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≤0.03
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≤0.03
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Bal
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4140
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0.38-0.45
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0.15-0.35
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0.75-1.0
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≤0.025
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≤0.025
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0.8-1.1
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0.15-0.25
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Bal
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410
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0.08-0.15
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≤1.0
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≤1.0
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≤0.025
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≤0.025
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11.5-13.5
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≤0.75
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Bal
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410SS
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≤0.08
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≤1.0
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≤1.0
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≤0.025
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≤0.025
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11.5-13.5
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≤0.6
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Bal
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F6NM
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≤0.05
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≤0.6
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0.5-1.0
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≤0.025
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≤0.025
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11.5-14.0
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0.5-1.0
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3.5-5.5
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Bal
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F51
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≤0.03
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≤1.0
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≤2
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≤0.025
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≤0.025
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21-23
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2.5-3.5
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4.5-6.5
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Bal
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17-4PH
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≤0.07
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≤1
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≤1
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≤0.025
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≤0.025
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15.0-17.5
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3.0-5.0
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3.0-5.0
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0.15-0.45
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Bal
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Inconel625
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≤0.1
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≤0.5
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≤0.5
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≤0.015
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≤0.015
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20-23
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8-10
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Bal
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3.15-4.15
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≤0.4
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≤0.4
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≤1
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≤5
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Inconel718
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≤0.08
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≤0.35
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≤0.35
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≤0.015
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≤0.015
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17-21
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2.8-3.3
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50-55
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≤0.3
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4.75-5.5
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0.2-0.8
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0.65-1.15
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≤1
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Bal
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Specifications
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product levels
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Manufacturing precision
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inch
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mm
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PSL
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1-13/16
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46
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PSL1
PSL2
PSL3
PSL3G
PSL4
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Parallelism：≤0.02
Flatness：≤2 light bands
Roughness：≤0.1
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2-1/16
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52
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2-9/16
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65
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3-1/16
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78
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3-1/8
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80
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4-1/16
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103
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4-1/8
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105
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5-1/16
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128
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5-1/8
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130
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6-1/16
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150
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7-1/16
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180
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Material property requirements
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Material designation
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Yield strength
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Tensile strength
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Elongation
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Reduction in area
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(σ0.2min,psi)
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(σb min,psi)
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(δ4 gauge 2 inches,%min)
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（ψ,%min）
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36K
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36000
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70000
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21
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No requirement
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45K
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45000
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70000
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19
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32
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60K
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60000
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85000
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18
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35
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75K
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75000
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95000
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18
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35
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