Stainless Steel 1.4374-C850
Supply condition
EN 1.4374
C850 = cold worked to min. 850 MPa tensile
Quarter-hard strip and tube for structural trim and light springs where moderate bending is still required.
Values for the C850 condition
Other 1.4374 tempers and conditions
1.4374 is listed in 7 conditions; see the grade overview at 1.4374.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault Annealed (solution annealed, 2B/2D cold-rolled or 1D hot-rolled) | Default stock condition for sheet, strip, tube and bar; maximum ductility and corrosion resistance, best for deep drawing and welding. | 400 | 760 | 50 | 200 HB | — |
Cold worked to min. 700 MPa tensile | Lightly skin-passed / temper-rolled strip when slightly higher yield with near-annealed ductility is needed. | 450 | 780 | 45 | 20 HRC | 2.4 % IACS |
C850This page Cold worked to min. 850 MPa tensile | Quarter-hard strip and tube for structural trim and light springs where moderate bending is still required. | 600 | 900 | 25 | 26 HRC | 2.4 % IACS |
Cold drawn | Cold-drawn round bar and wire for fasteners and machined parts where better straightness, surface and strength than annealed bar are needed. | 700 | 950 | 20 | 28 HRC | 2.4 % IACS |
Cold worked to min. 1000 MPa tensile | Half-hard strip for clips, clamps, tubing and structural profiles needing high yield with limited forming. | 800 | 1,050 | 15 | 32 HRC | 2.4 % IACS |
Cold worked to min. 1150 MPa tensile | Three-quarter-hard strip for spring clips and high-strength flat parts with simple bends only. | 950 | 1,200 | 10 | 37 HRC | 2.4 % IACS |
Cold worked to min. 1300 MPa tensile | Full-hard strip for flat springs, shims and wear-resisting flat stock; forming is limited to shallow bends across the rolling direction. | 1,100 | 1,350 | 6 | 42 HRC | 2.4 % IACS |
What is 1.4374-C850?
1.4374-C850 is 1.4374 supplied in the C850 condition — quarter-hard strip and tube for structural trim and light springs where moderate bending is still required. 1.4374-C850 has a yield strength of 600 MPa (87 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 196 GPa (28.4 Msi). 1.4374-C850 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F). Annealed is the default condition FabDigit quotes; C850 is available on request or by drawing note.
Advantages
- High strength — 600 MPa (87 ksi), better than 86% of stainless steel grades
- Easy to machine — 45/100, better than 84% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
Limitations
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
- Needs corrosion protection — 50/100, worse than 78% of stainless steel grades
1.4374-C850 properties
Typical room-temperature values for 1.4374-C850; 24 are specific to this condition. Other listed values are 1.4374 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4374-C850 has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
1.4374-C850 has a yield strength of 600 MPa (87 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 86% of stainless steel grades. Elongation at break is 25% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal6
1.4374-C850 is rated for continuous service to 400°C (752 °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 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
1.4374-C850 conducts electricity at 2.4 % IACS, better than 67% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4374-C850 takes about 45 MJ of energy and emits 3.6 kg of CO₂ — less than 91% of stainless steel grades. Typical recycled content is 60%.
Manufacturability8
1.4374-C850's machinability is fair (45/100, better than 84% of stainless steel grades); weldability good (65/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4374-C850
Is 1.4374 easy to machine?
Treat like 304 but tougher: rigid setups, sharp positive-rake carbide, heavy constant feed and flood coolant to cut under the work-hardened skin.
Can 1.4374 be welded?
Readily welded by GTAW/GMAW/resistance methods with 307 or 308L-type filler; low carbon limits sensitization but keep interpass temperature low and avoid excessive heat input to control nitrogen porosity.
Can 1.4374 be formed, bent or molded?
Excellent deep-drawing and stretch-forming in the annealed condition, but higher yield and n-value than 304 mean greater press loads and springback; interstage annealing helps for severe draws.
What surface finishes work on 1.4374?
Not anodizable — passivate (nitric or citric) after fabrication, electropolish or apply No.4/BA mechanical finishes; use it indoors or coat it in chloride-rich outdoor environments to avoid tea-staining.
1.4374 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 |
|---|---|---|
| Clowered vs 1.4373 for weldability | ≤ 0.08 | 0.06 |
| Si | ≤ 1 | 0.5 |
| Mnpartial Ni replacement | 7.5 – 10.5 | 9 |
| P | ≤ 0.05 | — |
| S | ≤ 0.02 | — |
| Cr | 17 – 19 | 18 |
| Ni | 4 – 6 | 5 |
| Naustenite stabiliser and solid-solution strengthener | 0.05 – 0.25 | 0.15 |
| Fe | balance | — |
1.4374-C850 — frequently asked
What is 1.4374-C850 used for?
1.4374-C850 is typically used for welded structural components, tanks, process equipment and architectural fixtures. In short: weldable 2xx alternative; low-carbon 18-9-5 variant; deep-drawing Cr-Mn grade.
What is the yield strength of 1.4374-C850?
1.4374-C850 has a typical yield strength of 600 MPa (87 ksi) and a tensile strength of 900 MPa (131 ksi) — stronger than 86% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is 1.4374-C850 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 84% of stainless steel grades). Treat like 304 but tougher: rigid setups, sharp positive-rake carbide, heavy constant feed and flood coolant to cut under the work-hardened skin.
Can 1.4374-C850 be welded?
Yes — weldability is rated good (65/100). Readily welded by GTAW/GMAW/resistance methods with 307 or 308L-type filler; low carbon limits sensitization but keep interpass temperature low and avoid excessive heat input to control nitrogen porosity.
What surface finishes work on 1.4374-C850?
Not anodizable — passivate (nitric or citric) after fabrication, electropolish or apply No.4/BA mechanical finishes; use it indoors or coat it in chloride-rich outdoor environments to avoid tea-staining.
Can 1.4374-C850 be formed, bent or molded?
Excellent deep-drawing and stretch-forming in the annealed condition, but higher yield and n-value than 304 mean greater press loads and springback; interstage annealing helps for severe draws.
What is the maximum service temperature of 1.4374-C850?
1.4374-C850 is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4374 Annealed and 1.4374-C1300?
Annealed is the default condition — default stock condition for sheet, strip, tube and bar; maximum ductility and corrosion resistance, best for deep drawing and welding. C1300: full-hard strip for flat springs, shims and wear-resisting flat stock; forming is limited to shallow bends across the rolling direction. Yield strength is 400 MPa in Annealed versus 1,100 MPa in C1300.
Sources
- EN 10088-1 Stainless steels — List of stainless steels — CEN (2014)
- EN 10088-2 Stainless steels — Technical delivery conditions for sheet/plate and strip — CEN (2014)
- ASTM A666 — Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar — ASTM International (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Cr-Mn austenitic (200-series) stainless steel product data — Outokumpu / Aperam (2020)
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.