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Stainless Steel & Nickel Alloy Pump Shaft Quality Bars

Ram Alloys is a leading provider of stainless steel & nickel alloy pump shaft quality (PSQ) bars as well as custom bars that have been specially processed for high performance. PSQ indicates turned, ground and polished shafting used in rotating applications. The treatment to these bars leads to a tighter diameter tolerance by reducing the effects of wear while maintaining optimal functionality. Straightening treatments also enhance the performance of PSQ bars, ensuring they create minimal vibration through the entire shaft length. The result is a more efficient, reliable and high-performing pumping system.

What materials are used for pump shaft quality bars? 

  • 17-4
  • Nitronic 60
  • Duplex 2507
  • 410 Stainless Steel

What industries use PSQ bars? 

Additional Value Services

  • Value-added processing services
  • Same-day service capabilities
  • 24/7 emergency service availability

Historically, pump shaft quality bars have been used in pump system manufacturing but more applications now require a tighter diameter tolerance. We are uniquely capable of accommodating customer requests for custom PSQ bars by offering quick and efficient customization of stock PSQ bar products at our Houston facility. If your application demands PSQ bars with non-standard lengths, grades, and/or finishes, we will meet your procurement needs in an efficient manner.

Typical Pump Shaft Mechanical Properties

Mechanical Composition Table

GradeUNS NumberTensile Min (psi)Yield Min (psi)Elongation Min %Reductions Min %Hardness BHN
316 S31603 70,000 30,000 40 50 233 Max
416 S41600 100,000 85,000 20 46 207 - 262
410 S41000 110,000 85,000 15 45 223 - 269
17-4 S17400 135,000 105,000 16 50 277 Min
XM19 S20910 135,000 105,000 25 50 325 Max
Duplex S31803 90,000 65,000 25 50 290 Max
Duplex S32750          
Less or Equal to 2"   116,000 80,000 15 * 310 Max
Greater Than 2"   110,000 75,000 15 * 310 Max
K500 N05500 140,000 100,000 20 40 310 Max
Alloy 20 N08020 80,000 35,000 30 50 *


In addition to stocking and producing pump shaft quality bars, we also know how to handle this product since intrinsic PSQ bar characteristics can be altered or diminished by warehouse and processor mismanagement. Contact us today for your PSQ bar needs and to obtain a fast, no-obligation project quote.

Need more information? click here for a quote or call us at 713.466.1890 to speak with a Ram Alloys representative.