Stainless Steel 1.4319 3/4H
Supply condition
EN 1.4319
3/4H = three-quarter hard
High-strength strip for flat springs and shims that need only simple large-radius bends.
Values for the 3/4H condition
Other 1.4319 tempers and conditions
1.4319 is listed in 7 conditions; see the grade overview at 1.4319.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault Annealed (2B / 2R bright annealed strip and sheet) | Pick for maximum formability — deep drawing, stretch forming and parts that are welded before service. | 290 | 700 | 55 | 88 HRB | — |
Cold rolled, Rm ≥ 700 MPa | Lightly skin-passed temper for flat, stiff sheet that still needs moderate bending. | 420 | 760 | 40 | 19 HRC | 2.4 % IACS |
Quarter hard | Best strength/formability compromise for clips, brackets and formed panels. | 600 | 900 | 25 | 25 HRC | — |
Half hard | Structural strip for rail-vehicle panels, clamps and lightly formed high-strength parts. | 820 | 1,080 | 16 | 32 HRC | 2.3 % IACS |
3/4HThis page Three-quarter hard | High-strength strip for flat springs and shims that need only simple large-radius bends. | 960 | 1,230 | 12 | 37 HRC | 2.3 % IACS |
Full hard | Maximum as-rolled strength for springs, shim stock and wear strips; very limited bending. | 1,100 | 1,380 | 8 | 41 HRC | — |
Full Hard + stress relieved | Choose when formed springs need higher elastic limit and reduced residual stress/springback drift. | 1,250 | 1,450 | 6 | 43 HRC | 2.4 % IACS |
What is 1.4319 3/4H?
1.4319 3/4H is 1.4319 supplied in the 3/4H condition — high-strength strip for flat springs and shims that need only simple large-radius bends. 1.4319 3/4H has a yield strength of 960 MPa (139 ksi) and a tensile strength of 1,230 MPa (178 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 200 GPa (29 Msi). 1.4319 3/4H 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). Annealed is the default condition FabDigit quotes; 3/4H is available on request or by drawing note.
Advantages
- High strength — 960 MPa (139 ksi), better than 98% of stainless steel grades
Limitations
- Limited ductility — 12%, worse than 95% of stainless steel grades
- Limited service temperature — 300°C (572 °F), worse than 90% of stainless steel grades
- Low fracture toughness — 75 MPa·√m (68.3 ksi·√in), worse than 81% of stainless steel grades
- Needs corrosion protection — 50/100, worse than 78% of stainless steel grades
1.4319 3/4H properties
Typical room-temperature values for 1.4319 3/4H; 23 are specific to this condition. Other listed values are 1.4319 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4319 3/4H 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
1.4319 3/4H has a yield strength of 960 MPa (139 ksi) and a tensile strength of 1,230 MPa (178 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 12% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4319 3/4H 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 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
1.4319 3/4H conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4319 3/4H takes about 53 MJ of energy and emits 5 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
1.4319 3/4H's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability good (55/100); formability fair (38/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4319 3/4H
Is 1.4319 easy to machine?
Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed and flood coolant; avoid dwelling and re-cutting the hardened skin.
Can 1.4319 be welded?
Readily GTAW/GMAW/resistance welded with 308L/307 fillers; the low carbon avoids sensitisation, but keep heat input low to limit distortion and hot-crack risk in this low-ferrite chemistry.
Can 1.4319 be formed, bent or molded?
Excellent deep-draw and stretch behaviour when annealed, with very high work-hardening rate — allow for large springback, high press loads and interstage annealing on severe draws.
What surface finishes work on 1.4319?
Not anodisable; passivate (ASTM A967) after machining, and use electropolishing, BA/2B mill finish, brushing or PVD coating for appearance.
1.4319 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 vs 1.4310 (X10CrNi18-8) | ≤ 0.07 | 0.05 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 2 | 1.3 |
| P | ≤ 0.05 | — |
| S | ≤ 0.02 | — |
| Cr | 16 – 18 | 17 |
| Nicontrols austenite stability / work-hardening rate | 6 – 8 | 7 |
| N | ≤ 0.11 | — |
| Fe | balance | — |
1.4319 3/4H — frequently asked
What is 1.4319 3/4H used for?
1.4319 3/4H is typically used for cold-formed structural parts, springs, decorative trim and automotive strip components. In short: cold-work strengthened austenitic; lower carbon than 301; deep-draw and spring strip.
What is the yield strength of 1.4319 3/4H?
1.4319 3/4H has a typical yield strength of 960 MPa (139 ksi) and a tensile strength of 1,230 MPa (178 ksi) — stronger than 98% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is 1.4319 3/4H easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed and flood coolant; avoid dwelling and re-cutting the hardened skin.
Can 1.4319 3/4H be welded?
Yes — weldability is rated good (55/100). Readily GTAW/GMAW/resistance welded with 308L/307 fillers; the low carbon avoids sensitisation, but keep heat input low to limit distortion and hot-crack risk in this low-ferrite chemistry.
What surface finishes work on 1.4319 3/4H?
Not anodisable; passivate (ASTM A967) after machining, and use electropolishing, BA/2B mill finish, brushing or PVD coating for appearance.
Can 1.4319 3/4H be formed, bent or molded?
Excellent deep-draw and stretch behaviour when annealed, with very high work-hardening rate — allow for large springback, high press loads and interstage annealing on severe draws.
What is the maximum service temperature of 1.4319 3/4H?
1.4319 3/4H 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.
What is the difference between 1.4319 Annealed and 1.4319-FH?
Annealed is the default condition — pick for maximum formability — deep drawing, stretch forming and parts that are welded before service. FH: maximum as-rolled strength for springs, shim stock and wear strips; very limited bending. Yield strength is 290 MPa in Annealed versus 1,100 MPa in FH.
Sources
- EN 10088-1/-2 Stainless steels — list of grades and technical delivery conditions for sheet/plate/strip — CEN (2014)
- EN 10151 Stainless steel strip for springs — CEN (2002)
- ASTM A666 Standard Specification for 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)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Cold-rolled austenitic spring strip datasheets (301/1.4310/1.4319 class) — Outokumpu / Sandvik (2023)
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.