Stainless Steel 410
What is Grade 410 Stainless Steel ?
SS 410 is a martensitic stainless steel containing 11.5–13.5% chromium, offering a practical balance of strength, hardness, and moderate corrosion resistance that can be significantly enhanced through heat treatment. As the most widely used martensitic grade, it is the standard choice wherever high mechanical performance is needed alongside acceptable corrosion behaviour.
Unlike austenitic grades such as SS 304 or SS 316, Grade 410 is heat-treatable, meaning its mechanical properties — particularly hardness and tensile strength — can be tuned by adjusting heat treatment parameters. It is also inherently magnetic in all conditions, which can be important for certain engineering applications.
Its combination of moderate alloy content, good thermal conductivity, and low raw material cost makes SS 410 one of the most cost-effective high-strength stainless steels available.
410 Stainless Steel Key Properties:
The metal is high in strength and hardness. It is magnetic when it is annealed or hardened. It also consists of a high carbon content which makes it excellent in wear resistance and edge retention after hardening due to the formation of chromium carbide compounds. This grade is also equipped with high-temperature oxidation and scaling resistance. It is pocket-friendly due to the low alloy content along with great thermal conductivity.
410 Stainless Steel Key Composition:
The 410 stainless steel is composed of Carbon, Manganese, Silicon, Phosphorus, Sulphur, Nickel and the most important for 410, Chromium. Their percentage pertaining to the metal are as follows- 0.15%, 1%, 1%, 0.04%, 0.03%, 0.75% and between 11.5% and 13.5% respectively. The balance is completed by Iron.
|
Element |
Min % |
Max % |
Role |
|
Carbon (C) |
— |
0.15 |
Hardness & wear resistance |
|
Chromium (Cr) |
11.5 |
13.5 |
Corrosion resistance (primary element) |
|
Manganese (Mn) |
— |
1 |
Deoxidiser, improves hot workability |
|
Silicon (Si) |
— |
1 |
Deoxidiser, oxidation resistance |
|
Nickel (Ni) |
— |
0.75 |
Minor toughness contribution |
|
Phosphorus (P) |
— |
0.04 |
Controlled for weldability |
|
Sulphur (S) |
— |
0.03 |
Controlled for corrosion resistance |
|
Iron (Fe) |
Balance |
— |
Base metal |
410 Stainless Steel Mechanical Properties:
The mechanical properties of SS 410 vary significantly depending on the heat treatment condition. The table below compares key properties in the annealed (soft) and hardened states.
|
Property |
Annealed |
Hardened |
Unit |
|
Tensile Strength (min) |
65,000 |
205,000 |
psi |
|
Yield Strength (0.2% offset) |
30,000 |
185,000 |
psi |
|
Elongation (in 2 in) |
20% |
8% |
% |
|
Hardness |
Rockwell B80 |
Rockwell C40 |
Rockwell |
Key takeaways:
- In the annealed condition, SS 410 is ductile and easily formed or machined.
- In the hardened condition, tensile strength more than triples — making it suitable for high-load structural components.
- Elongation reduces from 20% to 8% upon hardening, reflecting the increased brittleness associated with higher hardness.
Physical Properties of Physical Properties
|
Property |
Value |
Unit |
|
Melting Point |
2729°F / 1495°C |
— |
|
Density |
7.65 |
g/cm³ |
|
Specific Gravity |
7.65 |
— |
|
Modulus of Elasticity |
200 |
GPa |
|
Thermal Expansion Coefficient |
9.9 – 11.5 |
µm/m·°C |
|
Thermal Conductivity @ 100°C |
24.9 |
W/m·K |
|
Thermal Conductivity @ 500°C |
28.7 |
W/m·K |
|
Electrical Resistivity |
570 |
nΩ·m |
Equivalent Specifications of Stainless Steel 410
|
Standard |
Designation |
Number |
Country |
Notes |
|
UNS |
S41000 |
— |
USA |
Primary reference |
|
AISI / SAE |
410 |
— |
USA |
Common trade name |
|
BS (Old British) |
410S21 |
En 56A |
UK |
Legacy spec |
|
Euronorm |
X12Cr13 |
1.4006 |
Europe |
EN 10088 |
|
JIS |
SUS410 |
— |
Japan |
JIS G4303 |
|
SS (Swedish) |
2302 |
— |
Sweden |
— |
Corrosion Resistence of Stainless Steel 410
SS 410 provides satisfactory corrosion resistance in a range of mild environments. It performs well when fully hardened and when a smooth, polished surface finish is maintained — both factors significantly improve corrosion performance.
Environments where SS410 performs well:
- Atmospheric air and fresh water
- Steam and hot gases
- Mild organic and inorganic acids
- Ammonia, naptha, and dilute acetic acid
- Food acids (excellent resistance in food contact applications)
- Concentrated sulphuric acid and nitric acid (satisfactory, not optimal)
Limitations:
- SS 410 is less corrosion-resistant than austenitic grades (304, 316) and higher-chromium ferritic grades such as SS 430.
- It is not recommended for strongly oxidising acids, chloride-rich environments (seawater, de-icing salts), or reducing acids at high concentrations.
- For optimum corrosion performance, always specify a hardened and fully finished (polished or passivated) surface.
Heat Resistance of Stainless Steel 410
- Good scaling resistance is achievable at continuous service temperatures up to 650°C.
- Mechanical properties degrade significantly between 400°C and 580°C — avoid sustained service in this range.
- For elevated temperature applications above 650°C, consider higher-alloyed grades such as SS 309 or SS 310.
Heat Treatment of Stainless Steel 410
Annealing (full softening)
- Temperature range: 815–900°C
- Cooling method: Slow furnace cooling, followed by air cooling
- Purpose: Relieves internal stresses, maximises ductility, and prepares the material for machining or forming
Hardening
- Temperature range: 925–1010°C
- Cooling method: Air cooling or oil quenching (oil quench for complex sections)
- Purpose: Maximises hardness and tensile strength
Tempering
- Temperature range: 400–580°C
- Purpose: Reduces brittleness after hardening and fine-tunes the final hardness level
- Important: Avoid tempering in the 400–580°C range for extended periods during service, as this range reduces impact toughness
Welding SS 410
Grade 410 is weldable using standard techniques. However, its martensitic structure requires careful temperature control before and after welding to prevent cracking.
Welding guidelines:
- Preheat the workpiece to 150–260°C before welding to minimise thermal shock and cracking risk
- Post-weld annealing is essential — weld without annealing will leave the heat-affected zone brittle and susceptible to cracking
- Welding rods: Same-grade (SS 410) rods may be used. For improved ductility at the weld joint, Grade 309 rods are recommended per AS 1554.6 standards
- Avoid welding in the hardened condition where possible — anneal first, weld, then re-harden if required
Machining SS 410
SS 410 achieves its best machinability when in the annealed or highly tempered condition. Machining hardened stock (above 30 HRC) is significantly more difficult and accelerates tool wear.
Machining recommendations:
- Machine in the annealed condition wherever possible
- If hardness above 30 HRC is required, consider switching to Grade 416, which offers substantially better machinability for the same hardness range
- Use appropriate cutting speeds and coolant to avoid work hardening
- Passivation after machining is strongly recommended — this restores the passive chromium oxide layer disrupted by cutting operations
- Decontamination to remove embedded iron particles is also advised before any corrosion-critical service
Alternative Grades to SS 410
Depending on the application requirements, one of the following martensitic grades may be a better fit than SS 410:
|
Grade |
Best Used When |
Trade-off vs SS 410 |
Key Benefit |
|
SS 416 |
High-volume machining required |
Lower corrosion resistance |
Machinability |
|
SS 420 |
Greater hardness needed (knives, tools) |
Slightly less corrosion resistance |
Hardness |
|
SS 440C |
Maximum hardened strength required |
More difficult to weld |
Peak hardness |
Applications of SS 410
The combination of high strength, hardness, wear resistance, and moderate corrosion resistance makes SS 410 a versatile engineering grade. Below are the primary industry applications:
Oil, gas & petrochemical:
- Pump shafts, valve trim, and valve components
- Gas turbine blades and steam turbine components
- Petroleum refining equipment and distillation columns
Medical & surgical:
- Surgical instruments (scalpels, forceps, clamps)
- Dental instruments and orthodontic tools
Automotive:
- Automotive fasteners and high-strength structural parts
- Exhaust components and heat shields (light service)
Industrial & general engineering:
- Cutlery, flatware, and food processing blades
- Gate valves, ball valves, and pressure vessel internals
- Press plates, mining screens, and processing equipment
- Ore processing and sugar refinery machinery
Frequently Asked Questions - SS 410
Q1. Is SS 410 Stainless Steel magnetic?
Yes. Grade 410 is magnetic in both annealed and hardened conditions, owing to its martensitic crystal structure. This distinguishes it from austenitic grades such as 304 and 316, which are typically non-magnetic.
Q2. What is the difference between SS 410 and SS 416?
SS 416 has a higher sulphur content added to improve machinability, making it significantly easier to machine than SS 410. The trade-off is a slight reduction in corrosion resistance. If machinability is the priority and moderate corrosion resistance is acceptable, SS 416 is the preferred choice.
Q3. Can Grade 410 stainless steel be welded?
Yes, SS 410 can be welded. A preheat of 150–260°C is recommended, and post-weld annealing is essential to prevent cracking. Grade 309 welding rods are recommended where improved ductility at the joint is required (per AS 1554.6 standards).
Q4. What is the maximum service temperature for SS 410?
SS 410 exhibits good scaling resistance up to 650°C. However, mechanical properties reduce significantly in the 400–580°C temperature range. For sustained high-temperature service above 650°C, higher-alloyed grades are more suitable.
Q5. Is SS 410 food-grade or suitable for cutlery ?
Yes. Grade 410 is commonly used in cutlery and flatware due to its hardness, edge retention after hardening, and acceptable corrosion resistance against food acids. It must be in a fully hardened and polished condition for best performance.
Q6. What is the hardness of Grade 410 Stainless Steel?
When annealed, SS 410 has a hardness of Rockwell B80. When hardened and tempered, hardness reaches Rockwell C40. For machining purposes, it is recommended to keep hardness below 30 HRC; if higher hardness is needed, consider Grade 416.
Request a Quote for Grade 410 Stainless Steel
Ambica Steels supplies SS 410 bars and wires to clients across India, Europe, and the Middle East. Our team can assist with grade selection, material certification, and custom cut lengths.
- Email: dm@ambicasteels.com | info@ambicasteels.com
- Phone: +91 (11) 47034400
- Warehouse locations: New Delhi, India