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17-4PH martensitic precipitation hardening solid shaft & hollow shaft, UNS S17400, EN 1.4542, comply with ASTM A564 bar standard
Cu & Nb alloyed precipitation strengthening system, adjustable strength & hardness via different aging heat treatments
Multiple standard aging grades: H900 / H1025 / H1075 / H1150 / H1150D for diverse load & toughness demands
Corrosion performance equivalent to 304 stainless steel, far superior to regular 410/440C martensitic steel
Fully magnetic after heat treatment, low distortion after aging, ideal precision high-strength shaft blanks
Two stock forms: solid round shaft & seamless hollow shaft, save deep boring processing cost for hollow parts
Custom diameter, wall thickness, length & full CNC turning, boring, threading, splining per CAD drawings
Core material for aerospace, oil & gas, valve, mold, medical and high-strength mechanical spindles
Product Overview
This series of 17-4PH solid and hollow shafts are produced via hot rolling + cold drawing seamless piercing forming process. Base material is supplied under Condition A (Solution Annealed soft state) for easy CNC machining; customers can select target aging specification to achieve customized hardness and toughness.
17-4PH (AISI 630 / 1.4542) is the most widely used precipitation hardening stainless steel. It combines medium corrosion resistance and ultra-high mechanical strength, filling the gap between common martensitic stainless steel and high-cost nickel superalloys. Solid shaft is for solid spindle, bolt and shaft core; seamless hollow shaft eliminates deep boring operation on solid bar, greatly reducing material waste and machining cycle. Both stock types are widely machined into pump shafts, valve stems, aerospace structural spindles, oilfield downhole components, mold core shafts and medical instrument rotating parts for aerospace, petroleum, chemical, medical and mold industries.
Material Grade Characteristics – 17-4PH (UNS S17400 / 1.4542)
Martensitic PH stainless steel strengthened by copper-niobium precipitates after low-temperature aging
Condition A soft solution state for all machining workpieces before aging heat treatment
H900 aging delivers maximum hardness & tensile strength for heavy wear components
H1150 / H1150D double aging obtains optimal toughness & anti-SCC performance for sour gas service (NACE compliant)
Balanced corrosion resistance comparable to 304, better than 410/420/440C martensitic grades
Low thermal distortion after aging, stable dimensional accuracy for precision equipment shafts
Good weldability, can be aged after welding without large deformation
Chemical Composition (Weight %)
Grade
EN No.
C ≤
Si ≤
Mn ≤
P ≤
S ≤
Cr
Ni
Cu
Nb+Ta
Mo ≤
Fe
17-4PH
1.4542
0.07
1.00
1.00
0.040
0.030
15.0–17.5
3.0–5.0
3.0–5.0
0.15–0.45
0.60
Balance
Mechanical Properties (ASTM A564 Standard Heat Treatment States)
Delivery Condition
Min Tensile MPa
Min Yield MPa
Min Elongation %
Hardness Reference
Condition A (Solution Annealed)
1040
690
18
≤38 HRC
H900 (Aged 482℃)
1310
1170
10
40–47 HRC
H1025 (Aged 552℃)
1070
1000
12
35–42 HRC
H1075 (Aged 579℃)
1000
860
14
33–39 HRC
H1150 (Aged 621℃)
930
725
16
28–37 HRC
H1150D Double Aged
860
725
18
26–33 HRC
Unified Base Delivery Condition: Hot Rolled / Cold Drawn, Solution Annealed (Condition A), Stress‑Relieved, Pickled
Start from soft Condition A blank for full CNC machining, then age to H900~H1150 grades to match strength/toughness requirements of different working loads.
2 Better Corrosion Than Regular Martensite
Chromium-nickel-copper composite formula delivers corrosion resistance equivalent to 304, far outperforming 410/440C in atmospheric and weak acid environments.
3 Low Deformation After Aging
Minimal dimensional shift during precipitation hardening, perfectly suitable for precision shaft and mold core parts with tight tolerance.
Double Stock Option: Solid & Hollow Shaft
Seamless hollow shaft avoids heavy deep boring on solid bar, greatly cuts processing time and raw material loss for hollow spindle products.
NACE Qualified H1150D Grade
Double aged state improves sulfide stress cracking resistance, approved for oil & gas sour well downhole shaft components.
We supply 17-4PH solid shaft & seamless hollow shaft blanks and finished machined spindles for aerospace, oil gas, mold and medical global industrial clients.
Quality Assurance
100% UT & Eddy Current inspection for rolling & piercing internal defects
Full batch tensile, yield, hardness mechanical test for each aging grade
High-precision micrometer & CMM to control diameter, wall thickness, straightness tolerance
Spectrometer full chemical composition test per heat lot
Metallographic martensite-precipitate microstructure inspection after aging
Mill Test Certificate EN 10204 3.1 can be issued and delivered together with shipment documents before delivery.
Packing & Delivery
Packing
Inner: Individual anti-rust plastic sleeve + waterproof film full wrap
Outer: Reinforced fumigated wooden pallet with separation strips to prevent scratch & bending
Custom heavy-duty export packaging for large-diameter long shafts available upon request
Lead Time
Normally 10 – 45 working days after receiving advance payment. Exact lead time depends on shaft type (solid/hollow), diameter, length, order quantity and custom aging/machining demands.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler
Year Established:
1998
Total Annual:
>1-2 billion
Employee Number:
>200+
Ecer Certification：
Verified Supplier
HengAn Weiye Steel Group (HA Group) is a leading Chinese supplier of special steel, alloy materials, and precision machining services, with nearly 30 years of industry experience. The company integrates material sourcing, manufacturing, processing, and international trade, providing one-stop solutio... HengAn Weiye Steel Group (HA Group) is a leading Chinese supplier of special steel, alloy materials, and precision machining services, with nearly 30 years of industry experience. The company integrates material sourcing, manufacturing, processing, and international trade, providing one-stop solutio...
