Grade dossier
301 Stainless Steel for High-Strength Formed Parts
A leaner-nickel austenitic grade valued for rapid work hardening, high cold-worked strength and spring properties rather than for maximum corrosion margin.
Identity before substitution
Define the grade, product and condition together
A familiar grade name is not a complete purchase specification. Product form, controlling standard, dimensions, condition, finish, certification and service environment determine whether the delivered material is suitable.
Composition control
ASTM A240/A240M flat-product chemistry
Limits are not heat analysis targets
The table summarizes grade limits commonly used for plate, sheet and strip. Pipe, tube, bar, forgings and cast products can be governed by different specifications. Always place the product standard and edition on the purchase order.
| C | 0.15 max |
|---|---|
| Mn | 2.00 max |
| Si | 1.00 max |
| P | 0.045 max |
| S | 0.030 max |
| Cr | 16.00-18.00 |
| Ni | 6.00-8.00 |
| N | 0.10 max |
Properties with context
Minimums, typical indicators and delivered condition
Specified annealed flat-product values
| Annealed tensile strength | 515 MPa min |
|---|---|
| Annealed 0.2% yield strength | 205 MPa min |
| Annealed elongation | 40% min |
| Annealed hardness | 95 HRBW max |
Selection indicators
| Density | about 8.0 g/cm3 |
|---|---|
| Work hardening | Very high |
| Temper route | Annealed through full hard under ASTM A666 |
| Heat treatment | Strength comes mainly from cold work |
Values depend on product form, thickness, test orientation, condition and governing edition. Use the mill test certificate and the purchase specification for acceptance, not a web table alone.
Selection boundary
Where 301 belongs and where to escalate
Grade selection is an environmental decision, not a popularity contest. Review the complete medium, temperature, geometry, fabrication, cleaning and inspection requirements.
Good reasons to evaluate it
Springs, clips and retainers
High-strength formed strip
Vehicle and structural components using cold-worked strength
Parts where elastic recovery is engineered into tooling
Reasons to stop and review
RFQs without a temper or strength level
Substitution for 304 in corrosive service without review
Complex forming without springback trials
Welding after heavy cold work without procedure review
Fabrication route
Protect properties through cutting, forming and welding
Specify temper, rolling direction and mechanical-property range.
Plan tooling for strong work hardening and springback.
Cold work increases strength, hardness and magnetic response while reducing ductility.
Validate joining after the final forming route, not only in annealed material.
Supply definition
Product form changes the applicable requirements
Do not send an RFQ that names only the grade. State form, governing standard, dimensions, tolerances, finish, edge or end condition, quantity, certification and inspection.
Annealed plate, sheet and strip to ASTM A240/A240M
Cold-worked sheet and strip to ASTM A666
Precision strip and spring stock
Formed clips, springs and structural parts
Certificate checkpoint
Request heat identity, chemical analysis, mechanical results and compliance to the exact product specification. Add PMI, corrosion testing or supplementary examination only when the application requires it.
Interactive selection check
Test 301 against the controlling question
Procurement FAQ
Questions to close before placing the order
Is 301 stainless steel magnetic?
Can rise strongly with cold work
Can 301 replace another grade?
Only after checking the governing standard, composition, mechanical properties, corrosion exposure, fabrication route and certification. A commercial name is not a substitution approval.
Does the table apply to every product form?
Not automatically. The values shown use flat-product requirements as a reference. Other forms can use different product standards, dimensions and tests.
What should a 301 RFQ include?
Product form, standard and edition, UNS or EN designation, dimensions, tolerances, finish, quantity, service, fabrication, certificate and inspection requirements.
Sources, scope and RFQ
Use traceable grade data, then specify the actual product
ATI 301 technical data for UNS S30100
ASTM A240/A240M annealed flat-product requirements
ASTM A666 annealed and cold-worked sheet and strip requirements
Outokumpu Core 301/4310 grade guidance