WUXI PAZON TECHNOLOGY CO., LTD
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Stainless Steel Piston Rods are precision-ground and available with finished end machining, offering inherent corrosion resistance without plating. Available in diameters φ6–200 mm and lengths up to 6000 mm, they meet ISO f7/h7 tolerances with Ra≤0.2 μm finish. Multiple grades—304, 316, 2205, 17-4PH—can be supplied to match strength and environmental needs. Ideal for food, marine, medical and chemical hydraulic applications, with full customization of dimensions, tolerances, material, heat treatment and end machining supported.
PZPR0056
PAZON
Stainless Steel Piston Rods are precision-ground from premium stainless steel bars and can be supplied with finished end machining (threads, steps, cross-holes, etc.), ready for direct integration into hydraulic cylinders, pneumatic cylinders, shock absorbers and actuators. Relying on the inherent corrosion resistance of the stainless steel rather than any surface coating, they combine tight dimensional tolerances with an exceptionally smooth surface finish. They are widely used in food machinery, medical devices, marine hydraulics, chemical equipment, and corrosive or humid environments. A variety of stainless steel grades—austenitic, duplex, martensitic and precipitation-hardening types—are available to meet different requirements for strength, corrosion resistance and magnetic properties.
Diameter: Mainly φ6–200 mm, larger custom sizes accepted
Length: ≤6000 mm, custom lengths available
Straightness: ≤0.2 mm/M
Tolerance Grades: IT6–IT9
OD Tolerance: According to ISO f7/f8/g6/h7/h8/h9; customized tolerances available upon request
Ovality: Half of the tolerance value ISO f7
Core Hardness: Depending on grade and heat treatment; austenitic grades typically ≤200 HB; martensitic and PH grades can achieve 28–40 HRC or higher after Q&T
Surface Treatment: No plating, bare stainless steel ground finish; passivation available upon request
Surface Roughness: Ra≤0.2 μm, Rt≤2 μm
End Machining Capability: Threads, steps, flats, cross-holes, keyways, etc., as per customer drawing
Packing: Anti-rust oil + cardboard tube/plastic sleeve + wooden case
Inherent Corrosion Resistance: The stainless steel substrate itself resists corrosion, eliminating seal failure caused by coating peeling or rust
Ready-to-Use: Finished piston rods with end machining can be supplied, reducing subsequent operations for customers
High Precision Ground Finish: Tight tolerances and excellent surface roughness ensure precise fit with seals and guide rings
Flexible Material Choice: A wide range of grades including 304, 316, 2205, 17-4PH, balancing strength, corrosion resistance, magnetic properties and cost
Hygienic & Clean: The smooth surface minimizes contaminant adhesion, suitable for food, medical and clean environments
Dimensional Stability: Precision grinding delivers superior straightness and roundness, ensuring smooth equipment operation
In addition to standard specifications, we offer:
Custom diameters and lengths, including large and extra-long sizes
Tolerance grades and non-standard OD tolerances
Higher straightness upon request
Stainless steel grade selection and customized heat treatment (Q&T, aging, etc.)
End machining: various threads, steps, flats, cross-holes, keyways, etc., machined to drawing
Surface treatment: passivation for enhanced corrosion protection
Special packaging and identification
Limits and Fits Table
The table below provides shaft deviation values for commonly used tolerance grades f7, f8, g6, h7, h8, and h9 to assist your selection according to seal fits.
Limits and Fits Table | ||||||||||||
Diameter | f7 | f8 | g6 | h7 | h8 | h9 | ||||||
es | ei | es | ei | es | ei | es | ei | es | ei | es | ei | |
>6-10 | -0.013 | -0.028 | -0.013 | -0.035 | -0.005 | -0.014 | 0 | -0.015 | 0 | -0.022 | 0 | -0.036 |
>10-18 | -0.016 | -0.034 | -0.016 | -0.043 | -0.006 | -0.017 | 0 | -0.018 | 0 | -0.027 | 0 | -0.043 |
>18-30 | -0.020 | -0.041 | -0.020 | -0.053 | -0.007 | -0.020 | 0 | -0.021 | 0 | -0.033 | 0 | -0.052 |
>30-50 | -0.025 | -0.050 | -0.025 | -0.064 | -0.009 | -0.025 | 0 | -0.025 | 0 | -0.039 | 0 | -0.062 |
>50-80 | -0.030 | -0.060 | -0.030 | -0.076 | -0.010 | -0.029 | 0 | -0.030 | 0 | -0.046 | 0 | -0.074 |
>80-120 | -0.036 | -0.071 | -0.036 | -0.090 | -0.012 | -0.034 | 0 | -0.035 | 0 | -0.054 | 0 | -0.087 |
>120-180 | -0.043 | -0.083 | -0.043 | -0.106 | -0.014 | -0.039 | 0 | -0.040 | 0 | -0.063 | 0 | -0.100 |
>180-250 | -0.050 | -0.096 | -0.050 | -0.122 | -0.015 | -0.044 | 0 | -0.046 | 0 | -0.072 | 0 | -0.115 |
>250-315 | -0.056 | -0.108 | -0.056 | -0.137 | -0.017 | -0.049 | 0 | -0.052 | 0 | -0.081 | 0 | -0.130 |
>315-400 | -0.062 | -0.119 | -0.062 | -0.151 | -0.018 | -0.054 | 0 | -0.057 | 0 | -0.089 | 0 | -0.140 |
>400-500 | -0.068 | -0.131 | -0.068 | -0.165 | -0.020 | -0.060 | 0 | -0.063 | 0 | -0.097 | 0 | -0.155 |
>500-630 | -0.076 | -0.146 | -0.076 | -0.186 | -0.022 | -0.066 | 0 | -0.070 | 0 | -0.110 | 0 | -0.175 |
>630-800 | -0.080 | -0.160 | -0.080 | -0.205 | -0.024 | -0.074 | 0 | -0.080 | 0 | -0.125 | 0 | -0.200 |
>800-1000 | -0.086 | -0.176 | -0.086 | -0.226 | -0.026 | -0.082 | 0 | -0.090 | 0 | -0.140 | 0 | -0.230 |
>1000-1250 | -0.098 | -0.203 | -0.098 | -0.263 | -0.028 | -0.094 | 0 | -0.105 | 0 | -0.165 | 0 | -0.260 |
>1250-1600 | -0.110 | -0.235 | -0.110 | -0.305 | -0.030 | -0.108 | 0 | -0.125 | 0 | -0.185 | 0 | -0.290 |
Available Stainless Steel Grades & Chemical Composition
This product can be supplied in austenitic, duplex, ferritic, martensitic and precipitation-hardening stainless steels. The table below lists the standard chemical composition of commonly offered grades for your material selection reference.
Available Stainless Steel Grades & Chemical Composition | |||||||||||||
Category | GB Grade | AISI Grade | EN/DIN/NF Grade | C(%) | Si(%) | Mn(%) | P(%) | S(%) | Ni(%) | Cr(%) | Mo(%) | Cu(%) | N(%) |
Austenitic | Y12Cr18Ni9 | 303 | 1.4305 | ≤0.15 | ≤1 | ≤2 | ≤0.20 | ≥0.15 | 8-10 | 17-19 | - | ≤0.11 | |
- | 303Cu | - | ≤0.15 | ≤1 | ≤3 | ≤0.2 | ≥0.15 | 8-10 | 17-19 | - | 1.5-3.5 | - | |
06Cr19Ni10 | 304 | 1.4301 | ≤0.07 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 8-10.5 | 18-19.5 | - | - | - | |
06Cr19Ni10 | 304 | 1.4301 | ≤0.07 | ≤1 | ≤2 | ≤0.045 | 0.02-0.03 | 8-10.5 | 18-19.5 | - | - | - | |
022Cr19Ni10 | 304L | 1.4307 | ≤0.03 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 8-10.5 | 18-19.5 | - | - | - | |
022Cr19Ni10 | 304L | 1.4307 | ≤0.03 | ≤1 | ≤2 | ≤0.03 | 0.02-0.03 | 8-10.5 | 18-19.5 | - | - | - | |
- | 304L | - | ≤0.03 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 9-13 | 18-20 | - | - | - | |
- | - | Z2CN18.10 | ≤0.03 | ≤0.75 | ≤2 | ≤0.045 | ≤0.015 | 9-12 | 17-20 | - | ≤1 | - | |
- | 304H | - | 0.04-0.08 | ≤1 | ≤2 | ≤0.04 | ≤0.03 | 8-10.5 | 18-20 | - | - | - | |
- | 304N1 | - | ≤0.08 | ≤1 | ≤2.5 | ≤0.045 | ≤0.03 | 7-10.5 | 18-20 | - | - | 0.1-0.25 | |
10Cr18Ni9NbCu3BN | S30432 | - | 0.07-0.13 | ≤0.3 | ≤1 | ≤0.04 | ≤0.01 | 7.5-10.5 | 17-19 | - | 2.5-3.5 | 0.05-0.12 | |
06Cr25Ni20 | 310S | 1.4845 | ≤0.08 | ≤1.5 | ≤2 | ≤0.045 | ≤0.03 | 19-22 | 24-26 | - | - | - | |
- | S31254 | 1.4547 | ≤0.021 | ≤0.7 | ≤1 | ≤0.03 | ≤0.01 | 17.5-18.5 | 19.5-20.5 | 6-6.5 | 0.5-1 | 0.18-0.22 | |
- | S31050 | 1.4466 | ≤0.025 | ≤0.4 | ≤2 | ≤0.02 | ≤0.015 | 21-23 | 24-26 | 2-2.5 | - | 0.1-0.16 | |
- | S31400 | 1.4841 | ≤0.25 | 1.5-3 | ≤2 | ≤0.045 | ≤0.03 | 19-22 | 23-26 | - | - | - | |
06Cr17Ni12Mo2 | 316 | 1.4401 | ≤0.07 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 10-13 | 16.5-18 | 2-2.5 | - | - | |
06Cr17Ni12Mo2 | 316 | 1.4401 | ≤0.07 | ≤1 | ≤2 | ≤0.045 | 0.02-0.03 | 10-13 | 16.5-18 | 2-2.5 | - | - | |
06Cr17Ni12Mo2 | 316L | 1.4404 | ≤0.03 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 10-13 | 16.5-18 | 2-2.5 | - | - | |
- | 316L | - | ≤0.03 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 12-15 | 16-18 | 2-3 | - | - | |
022Cr17Ni12Mo2 | 316L | 1.4404 | ≤0.03 | ≤1 | ≤2 | ≤0.045 | 0.02-0.03 | 10-14 | 16.5-18 | 2-2.5 | - | - | |
- | - | Z2CND17.12 | ≤0.03 | ≤0.75 | ≤2 | ≤0.03 | ≤0.015 | 10-14 | 16-19 | 2-2.5 | ≤1 | - | |
- | - | Z2CND18.12 | ≤0.035 | ≤1 | ≤2 | ≤0.03 | ≤0.015 | 11.5-12.5 | 17-18 | 2.25-2.75 | ≤1 | ≤0.08 | |
06Cr17Ni12Mo2Ti | 316Ti | 1.4571 | ≤0.08 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 10.5-13.5 | 16.5-18 | 2-2.5 | - | - | |
07Cr17Ni12Mo2 | 316H | - | 0.04-0.08 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 10-14 | 16-18 | 2-3 | - | ≤0.1 | |
022Cr19Ni13Mo3 | 317L | - | ≤0.03 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 11-15 | 18-20 | 3-4 | - | - | |
06Cr18Ni11Ti | 321 | 1.4541 | ≤0.08 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 9-12 | 17-19 | - | - | - | |
- | 321 | - | ≤0.08 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 9-12 | 17-19 | - | - | ≤0.1 | |
07Cr19Ni11Ti | 321H | - | 0.04-0.1 | ≤0.75 | ≤2 | ≤0.03 | ≤0.03 | 9-12 | 17-19 | - | - | - | |
- | 321H | 1.4940 | 0.04-0.1 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 9-12 | 17-19 | - | - | - | |
07Cr25Ni21NbN | 310HCbN | - | 0.04-0.1 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 19-22 | 24-26 | - | - | 0.15-0.35 | |
06Cr18Ni11Nb | 347 | 1.4550 | ≤0.08 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 9-13 | 17-19 | - | - | - | |
07Cr18Ni11Nb | 347H | - | 0.04-0.1 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 9-13 | 17-19 | - | - | - | |
08Cr18Ni11NbFG | 347HFG | - | 0.08-0.1 | ≤1 | ≤2 | ≤0.045 | ≤0.03 | 9-13 | 17-19 | - | - | - | |
015Cr21Ni26Mo5Cu2 | N08904 | - | ≤0.02 | ≤1 | ≤2 | ≤0.045 | ≤0.035 | 23-28 | 19-23 | 4-5 | 1-2 | ≤0.1 | |
Duplex | 022Cr19Ni5Mo3Si2N | S31500 | - | ≤0.03 | 1.4-2 | 1.2-2 | ≤0.03 | ≤0.03 | 4.3-5.2 | 18-19 | 2.5-3 | - | 0.05-0.1 |
022Cr23Ni5Mo3N | S32205 | - | ≤0.03 | ≤1 | ≤2 | ≤0.03 | ≤0.02 | 4.5-6.5 | 22-23 | 3-3.5 | - | 0.14-0.2 | |
022Cr23Ni5Mo3N | S31803/F51 | 1.4462 | ≤0.03 | ≤1 | ≤2 | ≤0.03 | ≤0.02 | 4.5-6.5 | 21-23 | 2.5-3.5 | - | 0.08-0.2 | |
022Cr25Ni7Mo4N | S32750 | - | ≤0.03 | ≤0.8 | ≤1.2 | ≤0.035 | ≤0.02 | 6-8 | 24-26 | 3-5 | - | 0.24-0.32 | |
022Cr23Ni4MoCuN | S32304 | 1.4362 | ≤0.03 | ≤1 | ≤2.5 | ≤0.04 | ≤0.03 | 3-5.5 | 21.5-24.5 | 0.05-0.6 | 0.05-0.6 | 0.05-0.2 | |
Ferrite Stainless Steel | 06Cr13Al | 405 | 1.4002 | ≤0.08 | ≤1 | ≤1 | ≤0.04 | ≤0.03 | ≤0.5 | 11.5-14.5 | - | - | - |
10Cr17 | 430 | 1.4016 | ≤0.12 | ≤1 | ≤1 | ≤0.04 | ≤0.03 | - | 16-18 | - | - | - | |
Y10Cr17 | 430F | 1.4105 | ≤0.12 | ≤1 | ≤1.25 | ≤0.06 | ≤0.15 | ≤0.6 | 16-18 | ≤0.6 | - | - | |
Martensitic Stainless Steel | 12Cr13 | 410 | 1.4006 | ≤0.15 | ≤1 | ≤1 | ≤0.04 | ≤0.03 | - | 11.5-13.5 | - | - | - |
Y12Cr13 | 416 | 1.4005 | ≤0.15 | ≤1 | ≤1.25 | ≤0.06 | ≤0.15 | - | 12-14 | - | - | - | |
14Cr17Ni2 | 431 | 1.4057 | 0.11-0.17 | ≤0.8 | ≤0.8 | ≤0.04 | ≤0.03 | 1.5-2.5 | 16-18 | - | - | - | |
20Cr13 | 420 | 1.4021 | 0.16-0.25 | ≤1 | ≤1 | ≤0.04 | ≤0.03 | ≤0.6 | 12-14 | - | - | - | |
30Cr13 | 420 | 1.4028 | 0.26-0.35 | ≤1 | ≤1 | ≤0.04 | ≤0.03 | ≤0.6 | 12-14 | - | - | - | |
04Cr13Ni5Mo | 415/F6NM | 1.4313 | ≤0.05 | ≤0.7 | ≤1.5 | ≤0.04 | ≤0.015 | 3.5-4.5 | 12-14 | 0.3-0.7 | - | ≥0.2 | |
- | - | 1.4104 | 0.1-0.17 | ≤1 | ≤1.5 | ≤0.04 | 0.15-0.35 | ≤0.6 | 15.5-17.5 | 0.2-0.6 | - | - | |
- | - | 1.4418 | ≤0.06 | ≤0.7 | ≤1.5 | ≤0.04 | ≤0.03 | 4-6 | 15-17 | 0.8-1.5 | - | ≥0.2 | |
Precipitation Hardening Stainless Steel | 05Cr15Ni5Cu4Nb | S15500 | - | ≤0.07 | ≤1 | ≤1 | ≤0.04 | ≤0.03 | 3.5-5.5 | 14-15.5 | - | 2.5-4.5 | - |
05Cr17Ni4Cu4Nb | 630 | 1.4542 | ≤0.07 | ≤1 | ≤1 | ≤0.04 | ≤0.02 | 3-5 | 15-17.5 | - | 3-5 | - | |
