Stainless Steel 1.4373 Full Hard
Supply condition
EN 1.4373 · UNS S20200 · AISI/SAE 202 · GB 12Cr18Mn9Ni5N, 1Cr18Mn8Ni5N
Maximum as-rolled strength for flat springs, straps and stamped hardware; no significant forming possible.
Values for the Full Hard condition
Other 1.4373 tempers and conditions
1.4373 is listed in 9 conditions; see the grade overview at 1.4373.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
No.1 plate / hot-rolled bar | Heavy plate and hot-rolled bar condition for welded fabrication where surface finish is secondary. | 350 | 680 | 50 | 185 HB | 2.4 % IACS |
AnnealedDefault solution annealed (1050–1120 °C, water quenched); 2B / BA / 2D / No.1 finishes | Default stocked condition for sheet, coil, tube and bar; maximum ductility and corrosion resistance, non-magnetic. | 370 | 700 | 52 | 190 HB | — |
Lightly temper-rolled strip/sheet | Choose when slightly higher yield and flatter, stiffer sheet are needed with almost annealed formability. | 400 | 720 | 40 | 210 HB | 2.4 % IACS |
Cold rolled to ASTM A666 1/8-hard temper | Mild cold-rolled temper for panels and trim needing extra stiffness but still some bending. | 450 | 760 | 30 | 225 HB | 2.4 % IACS |
Quarter hard | Common structural temper for tube, trim and light brackets where 515 MPa minimum yield is specified. | 580 | 900 | 15 | 26 HRC | 2.4 % IACS |
bar and wire drawn after annealing | Pick for bar stock needing tighter tolerance, better surface and higher yield than annealed bar (fasteners, shafts). | 600 | 850 | 20 | 25 HRC | 2.4 % IACS |
Half hard | High-strength strip for clamps, springs-in-bending and structural sections; forming limited to gentle radii. | 820 | 1,070 | 12 | 32 HRC | 2.4 % IACS |
Three-quarter hard | Near-maximum strength strip for flat springs, shims and clips; essentially blanking/slitting only. | 990 | 1,240 | 8 | 37 HRC | 2.4 % IACS |
Full HardThis page cold rolled to ASTM A666 full-hard temper | Maximum as-rolled strength for flat springs, straps and stamped hardware; no significant forming possible. | 1,030 | 1,320 | 5 | 41 HRC | 2.3 % IACS |
What is 1.4373 Full Hard?
1.4373 Full Hard is 1.4373 supplied in the Full Hard condition — maximum as-rolled strength for flat springs, straps and stamped hardware; no significant forming possible. 1.4373 Full Hard has a yield strength of 1,030 MPa (149 ksi) and a tensile strength of 1,320 MPa (191 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 5% and the elastic modulus is 200 GPa (29 Msi). 1.4373 Full Hard 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; Full Hard is available on request or by drawing note.
Advantages
- High strength — 1,030 MPa (149 ksi), better than 98% of stainless steel grades
Limitations
- Limited ductility — 5%, worse than 100% of stainless steel grades
- Limited service temperature — 280°C (536 °F), worse than 96% of stainless steel grades
- Limited formability — 12/100, worse than 93% of stainless steel grades
- Low fracture toughness — 75 MPa·√m (68.3 ksi·√in), worse than 81% of stainless steel grades
- Needs corrosion protection — 47/100, worse than 81% of stainless steel grades
1.4373 Full Hard properties
Typical room-temperature values for 1.4373 Full Hard; 23 are specific to this condition. Other listed values are 1.4373 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4373 Full Hard 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).
Mechanical15
1.4373 Full Hard has a yield strength of 1,030 MPa (149 ksi) and a tensile strength of 1,320 MPa (191 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 5% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
1.4373 Full Hard is rated for continuous service to 280°C (536 °F). It conducts heat at 16 W/m·K (9.24 BTU/hr·ft·°F), better than 58% of stainless steel grades. Thermal expansion is 16.8 µm/m·K (9.33 µin/in·°F).
Electrical3
1.4373 Full Hard conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (47/100), worse than 81% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4373 Full Hard takes about 48 MJ of energy and emits 4.2 kg of CO₂ — less than 85% of stainless steel grades. Typical recycled content is 65%.
Manufacturability8
1.4373 Full Hard's machinability is fair (37/100, better than 57% of stainless steel grades); weldability fair (45/100); formability not recommended (12/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4373 Full Hard
Is 1.4373 easy to machine?
Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed to cut under the hardened layer, and flood coolant; roughly 40 % of 1212 speed.
Can 1.4373 be welded?
Weldable by GTAW/GMAW/resistance methods with 308L or 309L filler; keep heat input low and interpass below ~150 °C, as the higher carbon and Mn make sensitization and hot cracking more likely than in 304.
Can 1.4373 be formed, bent or molded?
Deep drawable but with a high work-hardening rate — expect 30–50 % more press force than 304 and plan interstage anneals for severe draws; springback is substantial.
What surface finishes work on 1.4373?
Takes a bright mechanical or electropolished finish and PVD coating well; passivate after machining/welding and avoid carbon-steel contamination, since the lower PREN makes rust staining more likely outdoors.
1.4373 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 |
|---|---|---|
| CEN 10088 max 0.15 | ≤ 0.15 | 0.08 |
| Si | ≤ 1 | 0.5 |
| MnASTM S20200: 7.5–10.0 | 7.5 – 10.5 | 9 |
| P | ≤ 0.06 | 0.03 |
| SASTM S20200 allows 0.030 max | ≤ 0.02 | 0.01 |
| Cr | 17 – 19 | 18 |
| Ni | 4 – 6 | 5 |
| Naustenite stabiliser, raises strength | 0.05 – 0.25 | 0.15 |
| Fe | balance | — |
1.4373 Full Hard — frequently asked
What is 1.4373 Full Hard used for?
1.4373 Full Hard is typically used for kitchen equipment, industrial fasteners, furniture tubing and appliance panels. In short: low-nickel 304 substitute; cost-stable 2xx workhorse; formable but stain-prone.
What is the yield strength of 1.4373 Full Hard?
1.4373 Full Hard has a typical yield strength of 1,030 MPa (149 ksi) and a tensile strength of 1,320 MPa (191 ksi) — stronger than 98% of stainless steel grades. Strength varies by condition: see the 9 listed tempers.
Is 1.4373 Full Hard easy to machine?
Not especially — machinability is rated fair (37/100, better than 57% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, heavy positive feed to cut under the hardened layer, and flood coolant; roughly 40 % of 1212 speed.
Can 1.4373 Full Hard be welded?
With care — weldability is rated fair (45/100). Weldable by GTAW/GMAW/resistance methods with 308L or 309L filler; keep heat input low and interpass below ~150 °C, as the higher carbon and Mn make sensitization and hot cracking more likely than in 304.
What surface finishes work on 1.4373 Full Hard?
Takes a bright mechanical or electropolished finish and PVD coating well; passivate after machining/welding and avoid carbon-steel contamination, since the lower PREN makes rust staining more likely outdoors.
Can 1.4373 Full Hard be formed, bent or molded?
Deep drawable but with a high work-hardening rate — expect 30–50 % more press force than 304 and plan interstage anneals for severe draws; springback is substantial.
What is the maximum service temperature of 1.4373 Full Hard?
1.4373 Full Hard is rated for continuous use to about 280°C (536 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 10088-1/-2 Stainless steels — list and technical delivery conditions (X12CrMnNiN18-9-5, 1.4373) — CEN (2014)
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip (S20200) — ASTM International (2023)
- ASTM A666 — Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar — ASTM International (2015)
- GB/T 20878 / GB/T 3280 — (12Cr18Mn9Ni5N) — SAC (2019)
- 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)
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.