Skip to main content
Stainless Steel
Market
Build an RFQ
Home / Technical Resources / 301 vs 304L Stainless Steel
Stainless steel grade comparison

301 vs 304L Stainless Steel

Compare 301 and 304L stainless steel by chemistry, room-temperature strength, work-hardening response, formability, welding, intergranular-corrosion resistance, product form, corrosion environment and fabrication route.

Quick answer: choose 301 when high strength after cold working, spring behavior or lightweight formed components drive the design. Choose 304L when low-carbon chemistry, weldability, resistance to sensitization and broad general-purpose corrosion performance are more important.
Ask an Engineer Request Technical Quote

High work hardening vs low-carbon general-purpose grade

301
EN 1.4310 · UNS S30100
  • Structure Austenitic
  • Typical C 0.10%
  • Typical Cr 17.0%
  • Typical Ni 7.0%
  • Strength route Cold work
  • Key use Spring / forming
304L
EN 1.4307 · UNS S30403
  • Structure Austenitic
  • Typical C 0.02%
  • Typical Cr 18.1%
  • Typical Ni 8.1%
  • Key feature Low carbon
  • Key use Welded equipment

Technical basis: Outokumpu Core 301/4310 and Core 304L/4307. Typical chemistry is shown for comparison; the applicable product standard and material test certificate control final acceptance.

M03 · Decision summary

301 or 304L stainless steel: which one should you specify?

Both grades are Cr-Ni austenitic stainless steels, but 301 is intentionally positioned toward high work-hardening capacity and mechanically loaded formed parts, while 304L uses low-carbon chemistry to improve welded-service reliability and provide a broadly balanced fabrication profile.

Decision first: use 301 when cold deformation is part of the strengthening strategy. Use 304L when the component contains important welds, corrosion resistance after heat input matters, or a broadly available general-purpose Cr-Ni stainless grade is required.
Choose 301

High-strength cold-worked components

Best for springs, strip and formed components when high work-hardening capacity can be used to create the final mechanical strength.

Choose 304L

Welded general-purpose equipment

Best when low-carbon chemistry, good weldability, good formability and resistance to sensitization-related intergranular corrosion are more important.

Reconsider both

Severe chloride service

Neither grade contains intentional molybdenum. Warm seawater, severe chloride pitting or aggressive process chemicals may require 316L, duplex or another higher-alloy grade.

Decision factor 301 stainless steel 304L stainless steel
Primary design goal High mechanical loading and cold-work strengthening.
301 advantage 		Balanced general-purpose corrosion, formability and weldability.
Cold-rolled Rp0.2 250 MPa.
Higher 		220 MPa.
Cold-rolled Rm 600–950 MPa. 520–700 MPa.
Elongation 40%. 45%.
More balanced ductility
Work hardening High.
Major advantage 		Austenitic work hardening, but normally less aggressive than 301.
Welded service Weldable, but higher carbon requires more attention to thermal history. Low carbon reduces carbide precipitation after heat input.
304L advantage
Intergranular corrosion Review welding and sensitization conditions. Low-carbon chemistry specifically reduces sensitization risk.
General corrosion Good in mild to medium corrosive environments. Higher Cr/Ni and broad general-purpose use.
Usually preferred
Spring strip Key application family. Available in cold-worked forms, but 301 is usually the more direct spring-grade choice.
Welded tanks / equipment Possible after engineering review. Common application family.
Engineering reversal conditions: do not automatically upgrade from 301 to 304L just because welding exists, and do not automatically choose 301 because the required strength is high. Final temper, weld heat input, thickness, corrosion medium and required life all matter.
M04 · Technical data

301 vs 304L stainless steel properties

Ask an Engineer

The most useful direct comparison is the EN 10088-2 cold-rolled condition. Additional 304L hot-rolled and plate values are shown separately so different product conditions are not mixed into one number.

Request Technical Quote

Typical chemical composition

Typical manufacturer chemistry by mass. The governing product specification and MTC control final acceptance.

Element / feature 301 / S30100 304L / S30403 Selection significance Basis
Carbon, C 0.10% 0.02% 304L's lower carbon reduces carbide precipitation during welding heat input. Typical manufacturer chemistry
Chromium, Cr 17.0% 18.1% 304L has the higher typical chromium content. Outokumpu typical values
Nickel, Ni 7.0% 8.1% 304L has the more conventional 18Cr-8Ni chemistry. Outokumpu typical values
Molybdenum, Mo No intentional addition No intentional addition Neither has a 316L-style molybdenum chloride advantage. Grade design
Microstructure Austenitic Austenitic Both share broad austenitic fabrication behavior. Grade classification
Key metallurgical feature High work-hardening capacity Low-carbon Cr-Ni chemistry This is the primary material-selection difference. Manufacturer grade positioning

Cold-rolled mechanical properties at 20°C

EN 10088-2 reference values for the same cold-rolled product condition.

Property 301 / 1.4310 304L / 1.4307 Unit Selection meaning
Rp0.2 250 220 MPa 301 starts with the higher minimum proof strength.
Rp1.0 280 250 MPa 301 retains the higher cold-rolled proof strength.
Rm 600–950 520–700 MPa 301 has the wider and higher tensile range.
Minimum elongation 40 45 % 304L provides a more balanced general-purpose ductility profile.
Further cold-work strengthening High Available — 301 is the more direct high-work-hardening choice.

304L properties by flat-product condition

Mechanical requirements change with cold-rolled, hot-rolled and quarto-plate condition.

304L product form Rp0.2 Rp1.0 Rm Elongation
Cold rolled coil / sheet 220 MPa 250 MPa 520–700 MPa 45%
Hot rolled coil / sheet 200 MPa 240 MPa 520–700 MPa 45%
Quarto plate 200 MPa 240 MPa 500–700 MPa 45%

Fabrication and corrosion comparison

Use these factors together with the numeric mechanical data.

Factor 301 304L Design implication Buyer action
Cold work Very strong response Moderate austenitic response 301 can achieve very high strength after rolling, stamping or forming. Specify final temper or tensile-strength range.
Welding Possible with procedure control Excellent general-purpose choice 304L low carbon minimizes carbide precipitation after heat input. State joint type, thickness and filler requirement.
Sensitization More thermal-history dependent Reduced by low carbon 304L is preferred where welded corrosion performance matters. Review weld heat input and service environment.
Machining Difficult as work hardening develops Conventional austenitic machining Neither is a free-machining grade. Use rigid setups and appropriate tooling.
Severe chloride service Alternative grade review Alternative grade review Neither contains intentional Mo. Consider 316L, duplex or higher-alloy material.

Typical physical properties

Metric EN 10088-1 reference values.

Property 301 304L Condition Engineering meaning
Density 7.9 kg/dm³ 7.9 kg/dm³ Reference Essentially the same.
Elastic modulus 200 GPa 200 GPa 20°C Same cited elastic stiffness.
Thermal expansion 16.0 ×10⁻⁶/K 16.0 ×10⁻⁶/K 20–100°C Similar thermal movement.
Thermal conductivity 15 W/m·K 15 W/m·K 20°C Same cited conductivity.
Specific heat 500 J/kg·K 500 J/kg·K 20°C No useful selection difference here.
Electrical resistivity 0.73 Ω·mm²/m 0.73 Ω·mm²/m 20°C Same reference value.
Magnetizable No* No* Annealed reference Cold deformation can increase magnetic response, particularly in 301.
Key point: the physical-property table does not separate these grades very much. The real purchasing decision is driven by work-hardening strength and temper for 301 versus low-carbon welding, general fabrication and sensitization resistance for 304L.
M05 · Product form matrix

Product forms and supply routes for 301 and 304L

301 is strongly associated with cold-rolled, precision and temper-rolled strip applications. 304L has a broader general-purpose flat-product and fabricated-equipment supply chain.

Availability note: this matrix describes normal product and manufacturing routes only. It does not represent live stock. Confirm thickness, width, temper, finish, standard and actual availability.
Product / route 301 304L Availability language Procurement note
Cold-rolled coil & sheet Core product route Core product route Typical product form Confirm gauge, width, finish and mechanical condition.
Hot-rolled coil / strip Published product route Published product route Typical product form Confirm annealed / pickled condition and tolerances.
Precision strip Key product route Available by producer / program Confirm availability Especially relevant when 301 final temper controls strength.
Temper-rolled / spring strip Major application route Possible in cold-worked condition Project-specific Specify final tensile or proof-strength requirement.
Quarto plate Supplier-dependent Published product route Confirm availability 304L has established plate mechanical-property data.
Storage tank fabrication Application review required Established application family Project-specific 304L is often preferred where many welded seams are present.
Heat exchanger fabrication Application review required Established application family Project-specific Review fluid chemistry, weld details and tube / plate standard.
Pipe / tube systems Not primary 301 route Common grade family Confirm product standard Do not apply flat-product mechanical values to pipe without checking the governing standard.
Flanges / valves Not primary 301 route Common application family Project-specific Confirm whether forged, cast or wrought specification applies.
M06 · Grade selector

Use strength, welding and forming conditions to choose 301 or 304L

Select the conditions that actually control the service life and manufacturing route. The result is a preliminary grade direction, not final engineering approval.

Preliminary result

Define the fabrication route first

Start by deciding whether the component is primarily a cold-work-strengthened part or a welded general-purpose fabrication. That distinction usually determines whether 301 or 304L is the better starting point.

Cold work Welding Corrosion
Send Conditions to an Engineer
STEP 01 Define final strength

Annealed, temper rolled or cold-worked requirement.

STEP 02 Define welding

Joint count, thickness, filler and heat input.

STEP 03 Define environment

Water, chlorides, chemicals and cleaning process.

STEP 04 Define product form

Strip, coil, sheet, plate, tube or fabricated equipment.

M08 · Applications & limitations

Where 301 works, where 304L is safer, and where neither grade is enough

Discuss Your Application

301 makes sense where cold working is an intentional strengthening mechanism. 304L makes sense where fabrication includes welding and the project benefits from low-carbon, general-purpose Cr-Ni stainless behavior.

301

Typical reasons to choose 301

  • Springs
  • Press plates
  • Conveyor chains
  • Mixer blades
  • Sinks
  • Precision strip
  • Cold-worked high-strength parts
304L

Typical reasons to choose 304L

  • Food and beverage equipment
  • Chemical and pharmaceutical equipment
  • Heat exchangers
  • Storage tanks and containers
  • Pipes and tubes
  • Flanges and valves
  • General welded fabrication
!

Conditions requiring another alloy

  • Warm seawater
  • High chloride concentration
  • Severe pitting or crevice corrosion
  • Aggressive reducing acids
  • Very high temperature oxidation service
  • Applications requiring Mo-alloyed corrosion resistance

Failure modes that can reverse the recommendation

Why does 301 gain so much strength during cold working?
301 has high work-hardening capacity. Plastic deformation increases dislocation density and can also produce deformation-induced martensitic transformation, causing strength and hardness to rise substantially.
Why is 304L preferred for many welded components?
Its low carbon level reduces chromium-carbide precipitation associated with weld heat input, helping preserve resistance to sensitization-related intergranular corrosion.
Can cold-worked 301 become magnetic?
Yes. Annealed 301 is austenitic, but significant deformation can create deformation-induced martensite. The resulting magnetic response can become important in sensors, electronics or magnetic-separation environments.
Is 304L immune to corrosion after welding?
No. Low carbon reduces sensitization risk, but weld heat tint, surface contamination, crevices, chloride concentration and poor post-weld cleaning can still cause corrosion problems.
Is 301 always stronger than 304L?
In the cited cold-rolled EN condition, 301 has the higher strength range. However, final strength depends on product form and degree of cold work. 304L can also be supplied in cold-worked or temper-rolled conditions.
Can 304L replace 301 in a spring?
Only after the required spring force, fatigue behavior, tensile strength, thickness and temper are checked. 301 is normally the more direct choice when very high cold-worked strength is a central design requirement.
Are either 301 or 304L ideal for seawater?
They should not automatically be selected for aggressive seawater service. Neither contains intentional molybdenum, so chloride pitting and crevice corrosion can require 316L, duplex or a higher-alloy stainless steel.
Important: the 304L suffix solves a specific metallurgical problem: it limits carbon to reduce sensitization during welding. It does not automatically make 304L suitable for every chloride, acid or high-temperature environment.

Material image comparison

Reserved positions for approved product imagery showing each material option. These blocks can be replaced directly with Media Library images later.

301 stainless steel

Use an approved product-form or surface-detail image.

304l stainless steel

Use an approved product-form or application image.

M10 · Standards & equivalence

301 and 304L stainless steel grade designations

Both grades belong to the austenitic Cr-Ni family, but the product condition must remain attached to the grade designation. This is especially important for cold-worked 301.

Designation / standard 301 304L Procurement caveat
ASTM / AISI type 301 304L Use the complete product specification, not type alone.
UNS S30100 S30403 Useful for exact alloy identification.
EN material number 1.4310 1.4307 Common European material-number references.
EN name X10CrNi18-8 X2CrNi18-9 Low carbon is visible in the 304L EN designation.
JIS reference SUS301 SUS304L Verify chemistry and product standard before substitution.
GB reference Verify against project standard Verify against project standard Do not publish an assumed equivalence without checking the current standard.
ASTM A240/A240M Flat-product reference Flat-product reference Use the current revision and exact delivery condition.
EN 10088-2 Flat-product reference Flat-product reference Mechanical values vary with product form.
EN 10151 Relevant to spring strip Product-specific verification Important where 301 tensile-strength class or spring temper is specified.
Welded pipe / tube standards Product-specific verification Common 304L product family Use the actual pipe / tube specification instead of flat-product data.
301 · EN 10151 Relevant where stainless spring strip and cold-worked strength classes are specified.
301 · EN 10088-2 Flat-product chemistry, mechanical properties and delivery-condition reference.
304L · ASTM A240/A240M Common plate, sheet and strip specification family.
304L · EN 10088-2 Cold-rolled, hot-rolled and plate mechanical-property reference.

Equivalence is approximate until chemistry, product form, dimensions, surface condition, final temper and mechanical-property requirements all comply with the project specification.

M11 · Direct answers

301 vs 304L stainless steel FAQ

Direct answers to common engineering and procurement questions about 301 versus 304L stainless steel.

What is the main difference between 301 and 304L stainless steel?

301 is designed around high work-hardening capacity and mechanically loaded cold-formed components. 304L is a low-carbon general-purpose Cr-Ni stainless steel optimized for good formability and welding.

Which is stronger, 301 or 304L?

In the cited EN cold-rolled condition, 301 has Rp0.2 of 250 MPa and Rm of 600–950 MPa, compared with 220 MPa and 520–700 MPa for 304L. Cold-worked 301 can become much stronger.

Which is better for welding?

304L is usually preferred when welding is an important part of the fabrication. Its low carbon content reduces carbide precipitation caused by welding heat input.

Why is 301 used for springs?

301 gains strength rapidly during cold deformation. This makes temper-rolled and cold-worked 301 especially useful for springs and other components that require high elastic strength.

Does 304L have better corrosion resistance than 301?

304L is generally the more balanced general-purpose corrosion grade, with higher typical chromium and nickel. Its low carbon also provides an important advantage after welding. Actual performance still depends on the environment and surface condition.

Is 304L suitable for seawater?

304L should not automatically be selected for aggressive seawater. It contains no intentional molybdenum, so chloride pitting and crevice corrosion can require 316L, duplex or another higher-alloy grade.

Is 301 magnetic?

Annealed 301 is austenitic and nominally non-magnetic. However, strong cold deformation can create deformation-induced martensite and significantly increase its magnetic response.

Can 304L replace 301?

Only when the required final strength and spring behavior can still be achieved. If the component depends on 301's high work-hardening response, a direct substitution can change thickness, forming loads and final mechanical properties.

M13 · Sources & technical review

Technical basis for this 301 vs 304L comparison

Get Technical Support

This comparison separates cold-work strengthening, weld sensitization, general corrosion, product form and physical properties so 301 and 304L are not treated as simple interchangeable 300-series grades.

Primary technical references

  • Outokumpu Core Range Datasheet 301/4310 and 304L/4307 chemistry, EN mechanical properties, physical properties and product forms.
  • Outokumpu Core 301/4310 High work-hardening capacity, springs, press plates, conveyor chains, mixer blades and precision-strip applications.
  • Outokumpu Core 304L/4307 Low-carbon chemistry, weldability, formability, sensitization resistance and general-purpose applications.
  • ASTM A240/A240M Plate, sheet and strip chemistry and mechanical-property reference.
  • EN 10088-1 Grade designation and physical-property reference.
  • EN 10088-2 Flat-product technical delivery and mechanical-property reference.
  • EN 10151 Relevant where cold-rolled stainless spring strip and tensile-strength classes apply.

Page accountability

Author [Author name]

Add the real person responsible for the material-selection and procurement content.

Author credentials / role [Author credentials / role]

Use the actual materials, engineering or procurement role.

Technical reviewer [Technical reviewer name]

Add a real reviewer with relevant stainless steel, welding or corrosion experience.

Reviewer credentials / role [Reviewer credentials / role]

Do not publish invented reviewer credentials.

Review date [Reviewed date]

Set only after the technical review has actually been completed.

Page build date

23 September 2026

Status

Technical datasets prepared for review.

M14 · Ask an engineer

Still deciding between 301 and 304L?

Send the actual final temper, forming, welding and corrosion requirements so the material can be reviewed against the finished component instead of grade name alone.

  • 301, 304L or alternative grade under consideration
  • Coil, sheet, precision strip, plate, tube or fabricated component
  • Thickness, width, diameter and tolerance
  • Required yield and tensile strength
  • Required spring temper or final cold-work condition
  • Stamping, bending or drawing requirement
  • Welding process and filler requirement
  • Welded section thickness and heat input
  • Post-weld cleaning / pickling / passivation requirement
  • Water, chloride or process-chemical exposure
  • Normal and peak operating temperature
  • Required surface finish
  • Magnetic-response limitation
  • Applicable ASTM, EN, JIS or customer standard
  • Quantity, destination and due date
  • MTC, inspection and documentation requirement
Stainless Steel Technical Resources Request a Quote

Send your material requirement

For a useful 301 vs 304L review, include final strength or temper, forming method, weld details, corrosion environment, dimensions, quantity, standard and certificate requirements.

SSM Quote Request
Ask an Engineer