What Is AISI 416 Stainless Steel Round Bar？

​​What is AISI 416 Stainless Steel Round Bar?​​

AISI 416 is a ​​martensitic stainless steel​​ known for its ​​excellent machinability​​ and ​​good resistance to mild corrosive environments​​. It is widely used in applications such as ​​automotive components, pump shafts, gears, bolts, and valve parts​​ that require ​​moderate corrosion resistance and high hardness​​.

 

​​If you are looking for AISI 416 stainless steel round bars​​ for machining parts, shafts, or components that require ​​high strength and good corrosion resistance​​, ​​GNEE​​ is a reliable supplier to choose. Each ​​416 SS round bar​​ we provide is made from ​​high-purity electrolytic chromium-iron alloy raw materials​​, strictly complies with the ​​AISI 416 standard​​, and undergoes ​​full-element analysis by spectrometer + oxygen/nitrogen/hydrogen impurity testing​​.

SS 416 round bars are available in ​​softened annealed condition (hardness ≤183HBW)​​ or ​​quenched and tempered condition (hardness 220–260HBW, tensile strength ≥620MPa)​​. Surface finishes include ​​black oxide (hot-rolled), turned (smooth), ground (Ra≤0.4μm), and polished​​ options. Each batch is tested for ​​dimensional accuracy (±0.02mm–±0.05mm precision tolerance)​​, ​​surface defects (magnetic particle/penetrant inspection)​​, and comes with ​​material test certificates (MTC), third-party test reports (SGS/BV), and ISO 9001 certification documents​​.

AISI 416 Stainless Steel Round Bar Specification

Category	Specification
Standard	ASTM A582 / A276 / A484 / EN 10088-3
Grade	AISI 416 / EN 1.4005 / SUS416
Form	Round Bar, Hex Bar, Square Bar, Forged Bar
Condition	Annealed, Hardened, Tempered
Diameter Range	6 mm – 500 mm
Length	1000 mm – 6000 mm or custom cut
Surface Finish	Black, Bright, Polished, Peeled
Heat Treatment	Quenched and Tempered (Q&T)
Machinability Rating	110% (compared to free-cutting carbon steel)

 

Chemical Composition of AISI 416 Stainless Steel bar

Element	Content (%)
Carbon (C)	≤ 0.15
Chromium (Cr)	12.0 – 14.0
Manganese (Mn)	≤ 1.25
Silicon (Si)	≤ 1.00
Phosphorus (P)	≤ 0.04
Sulfur (S)	0.15 – 0.35
Iron (Fe)	Balance

 

Mechanical Properties (Annealed Condition)

Property	Typical Value
Tensile Strength	620 MPa – 760 MPa
Yield Strength (0.2% proof)	275 MPa
Elongation	18%
Hardness (Brinell)	≤ 217 HB
Density	7.75 g/cm³
Magnetic	Yes (magnetic in all conditions)

 

Is 416 stainless steel corrosion-resistant?
Yes, 416 offers moderate corrosion resistance, but it is less resistant than austenitic grades such as 304 or 316 due to its sulfur content. It performs best in dry environments or where lubricants are used.

 

Can 416 stainless steel be welded?
Welding is possible but not recommended due to the risk of cracking. Preheating (200–300°C) and post-weld annealing are required for best results.

 

What is the hardness of 416 stainless steel after heat treatment?
After hardening and tempering, it can reach up to HRC 40–45, offering high wear resistance.

 

What is the difference between 410 and 416 stainless steel?
The main difference is sulfur content - 416 has higher sulfur, which improves machinability but slightly lowers corrosion resistance.

 

Can 416 stainless steel be polished?
Yes, 416 can be polished to a bright finish, especially in bar and shaft applications.

 

416 Stainless Steel Round Bar Price Per kg

Product Type	Size Range (mm)	Approx. Price (USD/kg)	Remarks
AISI 416 Stainless Steel Round Bar	6 – 50 mm	$2.80 – $3.50	Bright / Annealed
AISI 416 Forged Bar	60 – 200 mm	$3.50 – $4.20	Quenched & Tempered
AISI 416 Polished Round Bar	Custom	On Request	Precision Machined

Prices fluctuate with nickel market trends, sulfur content, and machining costs. Buying directly from certified mills or trusted suppliers like Gnee ensures consistent quality and stable pricing.Email: sales@gneestainless.com

Packaging: Wooden crates, plastic packaging, anti-rust oil coating
Delivery time: 7-15 days after order confirmation