Stainless Steel 1.4307
EN 1.4307 · UNS S30403 · AISI/SAE 304L · JIS SUS304L · GB 022Cr19Ni10
1.4307 is the low-carbon (C ≤ 0.03 %) 18/8 austenitic stainless of EN 10088, equivalent to 304L, S30403 and SUS304L.
Reference datasheet — 1.4307 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the +AT condition
1.4307 tempers and conditions
1.4307 is supplied in 8 conditions, soft to hard. +AT is the default FabDigit quotes; the values on this page are for it.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
+ATDefault Solution annealed | Default stock condition for sheet, plate, tube and bar — maximum ductility, corrosion resistance and weldability. | 290 | 580 | 55 | 150 HB | — |
Lightly cold worked | Choose when flatness and a slight strength lift are wanted on strip/sheet while keeping near-annealed ductility. | 380 | 640 | 42 | 11 HRC | 2.4 % IACS |
Cold worked to minimum 0.2 % proof strength 350 MPa | Bar/wire condition specified when a guaranteed proof strength rather than a tensile band is needed. | 420 | 650 | 30 | 15 HRC | 2.4 % IACS |
Cold worked to tensile strength class 700 MPa | Lightly cold drawn bar/wire when moderately higher strength is needed but ≥20 % elongation must be retained. | 520 | 760 | 25 | 21 HRC | — |
Cold worked to minimum 0.2 % proof strength 500 MPa | Higher proof-strength cold drawn bar for shafts and fasteners where deflection under load must be limited. | 560 | 760 | 20 | 24 HRC | 2.3 % IACS |
Cold worked to tensile strength class 800 MPa | Medium-hard drawn bar/wire for springy clips, shafts and fasteners where ~12 % elongation is acceptable. | 620 | 860 | 16 | 26 HRC | — |
Cold worked to tensile strength class 900 MPa | Hard drawn small-diameter bar and wire where strength dominates and forming is minimal. | 750 | 960 | 11 | 30 HRC | — |
Cold worked to tensile strength class 1000 MPa | Highest standard cold-drawn strength class for 1.4307 wire/thin bar; strongly work-hardened and magnetic. | 850 | 1,060 | 8 | 33 HRC | — |
Supply forms, finishes and certifications
Ways 1.4307 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
1D | Hot rolled, solution annealed, pickled plate | Surface finish |
2B | Cold rolled, annealed, pickled, skin passed sheet | Surface finish |
What is 1.4307?
1.4307 is the low-carbon (C ≤ 0.03 %) 18/8 austenitic stainless of EN 10088, equivalent to 304L, S30403 and SUS304L. The low carbon suppresses grain-boundary carbide precipitation, so welded assemblies keep their corrosion resistance without a post-weld anneal; it is stocked as 2B and 1D sheet, plate, tube, bar and cold-worked strip from +CP350 to +C1000. Solution-annealed (+AT) properties are 290 MPa yield, 580 MPa tensile, 55 % elongation and 150 HB, with service to 425 °C. Machinability is poor (score 38) and chloride pitting resistance is limited — use 1.4404 (316L) for seawater or de-icing salts. 1.4307 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). 1.4307 has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 55% and the elastic modulus is 200 GPa (29 Msi).
What is 1.4307 used for?
- welded pressure vessels
- food processing equipment
- chemical tanks
- piping
Advantages
- Readily welded — 95/100, better than 99% of stainless steel grades
- Forms and bends easily — 92/100, better than 98% of stainless steel grades
- Ductile — tolerates forming and impact — 55%, better than 97% of stainless steel grades
- Polishes to a fine finish — 85/100, better than 97% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
1.4307 properties
Typical room-temperature values for 1.4307-+AT; bars are the position among stainless steel grades.
Physical3
1.4307 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4307 has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 55% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4307 is rated for continuous service to 425°C (797 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
1.4307 conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (65/100), better than 56% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4307 takes about 55 MJ of energy and emits 3.6 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 65%.
Manufacturability7
1.4307's machinability is fair (38/100, better than 63% of stainless steel grades); weldability excellent (95/100); formability excellent (92/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4307 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4307
Is 1.4307 easy to machine?
Gummy and strongly work-hardening: use sharp, positive-rake carbide, rigid setups, heavy constant feed (no dwelling), 80–140 m/min turning speed and copious coolant.
Can 1.4307 be welded?
Excellent by GTAW/GMAW/SMAW/laser with ER308L/E308L filler; low carbon avoids post-weld annealing, but keep interpass below ~150 °C and use backing gas on root passes.
Can 1.4307 be formed, bent or molded?
Very good deep drawing and bending (min bend radius ≈ 0.5 t annealed); allow large springback and expect ~30–50 % strength gain from cold work.
1.4307 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow carbon suppresses sensitization | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.45 |
| Mn | ≤ 2 | 1.4 |
| P | ≤ 0.05 | 0.03 |
| S0.030 max in ASTM A240 304L | ≤ 0.02 | 0.01 |
| N | ≤ 0.11 | 0.06 |
| Cr18.0–20.0 in ASTM A240 304L | 17.5 – 19.5 | 18.3 |
| Ni | 8 – 10.5 | 8.5 |
| Fe | balance |
What surface finishes work on 1.4307?
Pickle and passivate (ASTM A967) or electropolish after fabrication; takes mirror polish, brushed and bead-blast finishes well — never anodized.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4307 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S30403
- AISI / SAE
- 304L
- EN / DIN / Werkstoff-Nr.
- X2CrNi18-9
- GB (China)
- 022Cr19Ni10
- JIS
- SUS304L
How much does 1.4307 cost?
1.4307 is a standard-cost stainless steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4307 — frequently asked
What is 1.4307 used for?
1.4307 is typically used for welded pressure vessels, food processing equipment, chemical tanks and piping. In short: most weldable stainless; no post-weld sensitization; deep-draw 18/8 baseline.
What is the yield strength of 1.4307?
1.4307 has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 580 MPa (84.1 ksi) — weaker than 72% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is 1.4307 easy to machine?
Not especially — machinability is rated fair (38/100, better than 63% of stainless steel grades). Gummy and strongly work-hardening: use sharp, positive-rake carbide, rigid setups, heavy constant feed (no dwelling), 80–140 m/min turning speed and copious coolant.
Can 1.4307 be welded?
Yes — weldability is rated excellent (95/100). Excellent by GTAW/GMAW/SMAW/laser with ER308L/E308L filler; low carbon avoids post-weld annealing, but keep interpass below ~150 °C and use backing gas on root passes.
What surface finishes work on 1.4307?
Pickle and passivate (ASTM A967) or electropolish after fabrication; takes mirror polish, brushed and bead-blast finishes well — never anodized.
Can 1.4307 be formed, bent or molded?
Very good deep drawing and bending (min bend radius ≈ 0.5 t annealed); allow large springback and expect ~30–50 % strength gain from cold work.
What is the maximum service temperature of 1.4307?
1.4307 is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does 1.4307 cost?
1.4307 is a standard-cost stainless steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10088-1/-2/-3 Stainless steels — grade 1.4307 — CEN (2014)
- ASTM A240/A240M (UNS S30403) — ASTM International (2023)
- GB/T 4237 / GB/T 20878 022Cr19Ni10 — SAC (2015)
- Outokumpu Steel Grades, Properties and Global Standards — Outokumpu (2022)
- ASM Handbook Vol.1 — Properties of Stainless Steels — ASM International (1990)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.