Stainless Steel 1.4307 +C700
Supply condition
EN 1.4307 · UNS S30403 · AISI/SAE 304L · JIS SUS304L · GB 022Cr19Ni10
+C700 = 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.
Values for the +C700 condition
Other 1.4307 tempers and conditions
1.4307 is listed in 8 conditions; see the grade overview at 1.4307.
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 |
+C700This page 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 | — |
What is 1.4307 +C700?
1.4307 +C700 is 1.4307 supplied in the +C700 condition — lightly cold drawn bar/wire when moderately higher strength is needed but ≥20 % elongation must be retained. 1.4307 +C700 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi). 1.4307 +C700 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). +AT is the default condition FabDigit quotes; +C700 is available on request or by drawing note.
Advantages
- Polishes to a fine finish — 85/100, better than 97% of stainless steel grades
- Easy to machine — 50/100, better than 90% of stainless steel grades
- Readily welded — 85/100, better than 87% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
1.4307 +C700 properties
Typical room-temperature values for 1.4307 +C700; 18 are specific to this condition. Other listed values are 1.4307 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4307 +C700 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 +C700 has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4307 +C700 is rated for continuous service to 300°C (572 °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 +C700 conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 52% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4307 +C700 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 +C700's machinability is fair (50/100, better than 90% of stainless steel grades); weldability excellent (85/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4307 +C700
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.
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.
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 | — |
1.4307 +C700 — frequently asked
What is 1.4307 +C700 used for?
1.4307 +C700 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 +C700?
1.4307 +C700 has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is 1.4307 +C700 easy to machine?
Reasonably — machinability is rated fair (50/100, better than 90% 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 +C700 be welded?
Yes — weldability is rated excellent (85/100). 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 +C700?
Pickle and passivate (ASTM A967) or electropolish after fabrication; takes mirror polish, brushed and bead-blast finishes well — never anodized.
Can 1.4307 +C700 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 +C700?
1.4307 +C700 is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.