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444 molybdenum-containing grade with superior chloride pitting resistance for freshwater & solar equipment
No chloride stress corrosion cracking (SCC) risk in warm brine environments
Hot rolled & cold drawn precision stock, custom diameter/length + full CNC turning, threading per CAD drawings
Product Overview
This series ferritic stainless solid shafts are manufactured via hot rolling + cold drawing forming, then fully air-annealed to obtain uniform single ferritic microstructure. Without expensive nickel element, the raw material cost is greatly reduced compared to nickel-bearing stainless steel.
Four grades cover diverse industrial working scenarios: Low-chromium Ti-stabilized 409 is dedicated to automobile exhaust high-temperature spindles; standard 430 for household appliances and decorative rotating parts; Ti-alloyed 439 avoids sensitization after long thermal cycles for furnace equipment; Mo-added 444 solves freshwater chloride pitting problems. Ferritic shafts never generate SCC failure in hot salt water, a key advantage over austenitic stainless steel. Widely machined into exhaust spindles, heat exchanger rods, water heater shafts and light mechanical transmission blanks for auto, HVAC, solar and household appliance industries.
17Cr universal ferritic grade, stable in atmospheric & dry environments, good polishing property, suitable kitchen equipment, decorative support shafts and low-load mechanical spindles.
439 (UNS S43035 / 1.4510)
Titanium added to bind free carbon, completely avoid intergranular corrosion after welding; better ductility than 430, perfect furnace roller shafts and heat circulation equipment spindles.
444 (UNS S44400)
Molybdenum & dual stabilized ferritic stainless steel, high PRE value, remarkable anti-pitting performance in tap water & low-concentration brine, substitute 316L for solar heat exchanger shafts and desalination small spindles.
Chemical Composition (Weight %)
Grade
EN No.
C ≤
Si ≤
Mn ≤
P ≤
S ≤
Cr
Ni ≤
Mo
Ti
Fe
409
—
0.08
1.00
1.00
0.045
0.045
10.5–11.5
0.50
—
0.15–0.50
Balance
430
1.4016
0.12
1.00
1.00
0.040
0.030
16.0–18.0
0.75
—
—
Balance
439
1.4510
0.03
1.00
1.00
0.040
0.030
17.0–19.0
0.50
—
0.15–0.80
Balance
444
—
0.025
1.00
1.00
0.040
0.030
17.5–19.5
1.00
1.75–2.50
0.10–0.60
Balance
Mechanical Properties (Fully Annealed, ASTM A276)
Property
409
430
439
444
Delivery Condition
Hot Rolled / Cold Drawn, Fully Annealed, Stress‑Relieved, Pickled
We supply ferritic solid shafts for automotive, solar, HVAC and household appliance global industrial clients.
Quality Assurance
100% UT & Eddy Current inspection for rolling segregation & surface crack defects
Full batch tensile, yield & hardness mechanical performance testing per heat lot
High-precision micrometer to control diameter & straightness tolerance
Spectrometer full spectrum chemical composition analysis verification
Metallographic single ferritic microstructure inspection
Mill Test Certificate EN 10204 3.1 can be issued and delivered 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 extra long shafts available upon request
Lead Time
Normally 10 – 45 working days after receiving advance payment. Exact lead time depends on diameter, length, order quantity and custom 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...
