Stainless Steel S43037 1/4H
Supply condition
UNS S43037
1/4H = quarter hard
Choose for spring clips and clamps that need the higher 520 MPa yield but only small-deformation bends; quarter-hard cold rolling cuts elongation to 10% and formability.
Values for the 1/4H condition
Other S43037 tempers and conditions
S43037 is listed in 5 conditions; see the grade overview at S43037.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Cold rolled, annealed and pickled, dull matte finish | Choose the dull matte cold rolled, annealed and pickled finish for deep drawing, where lubricant retention limits galling and elongation reaches 32% at 275 MPa yield. | 275 | 470 | 32 | 145 HB | 2.9 % IACS |
Annealed 2BDefault Cold rolled, annealed, pickled and skin-passed | Pick the default cold rolled, annealed, pickled and skin-passed sheet or coil for exhaust parts and appliance liners, giving the best balance of forming (78) and welding (82). | 285 | 480 | 30 | 150 HB | — |
As-welded (no post-weld heat treatment) | Use when Ti/Nb stabilization allows service straight from the weld without sensitization risk; accept weld grain coarsening that limits elongation to 18% and lowers impact toughness. | 290 | 470 | 18 | 155 HB | 2.9 % IACS |
Temper rolled / skin-passed (light cold work, ~1/8 hard) | Choose the lightly cold-rolled, skin-passed state (about 1/8 hard) when higher stiffness and flatness are needed but parts must still bend; yield rises to 420 MPa, elongation falls to 18%. | 420 | 540 | 18 | 185 HB | 2.9 % IACS |
1/4HThis page Quarter hard | Choose for spring clips and clamps that need the higher 520 MPa yield but only small-deformation bends; quarter-hard cold rolling cuts elongation to 10% and formability. | 520 | 620 | 10 | 17 HRC | 2.9 % IACS |
What is S43037 1/4H?
S43037 1/4H is S43037 supplied in the 1/4H condition — choose for spring clips and clamps that need the higher 520 MPa yield but only small-deformation bends; quarter-hard cold rolling cuts elongation to 10% and formability. S43037 1/4H has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 200 GPa (29 Msi). S43037 1/4H has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F). Annealed 2B is the default condition FabDigit quotes; 1/4H is available on request or by drawing note.
Advantages
- Low embodied carbon — 3.4 kg CO₂/kg, better than 91% of stainless steel grades
- Easy to machine — 50/100, better than 90% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Conducts heat well — 24.2 W/m·K (14 BTU/hr·ft·°F), better than 83% of stainless steel grades
- High strength — 520 MPa (75.4 ksi), better than 79% of stainless steel grades
Limitations
- Limited ductility — 10%, worse than 98% of stainless steel grades
- Low fracture toughness — 55 MPa·√m (50.1 ksi·√in), worse than 91% of stainless steel grades
S43037 1/4H properties
Typical room-temperature values for S43037 1/4H; 23 are specific to this condition. Other listed values are S43037 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S43037 1/4H has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
S43037 1/4H has a yield strength of 520 MPa (75.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 79% of stainless steel grades. Elongation at break is 10% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S43037 1/4H is rated for continuous service to 500°C (932 °F). It conducts heat at 24.2 W/m·K (14 BTU/hr·ft·°F), better than 83% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
S43037 1/4H conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (54/100), worse than 75% of stainless steel grades.
Sustainability4
Producing a kilogram of S43037 1/4H takes about 43 MJ of energy and emits 3.4 kg of CO₂ — less than 94% of stainless steel grades. Typical recycled content is 60%.
Manufacturability8
S43037 1/4H's machinability is fair (50/100, better than 90% of stainless steel grades); weldability very good (78/100); formability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S43037 1/4H
Is S43037 easy to machine?
Machinability is slightly better than 304 but the chips still smear onto the tool: use sharp positive-rake tooling, high feed and plenty of emulsion coolant, and control depth of cut to limit the work-hardened layer and burr formation.
Can S43037 be welded?
GTAW, GMAW, laser and high-frequency welding all work, and the Ti/Nb stabilization means no post-weld anneal is needed in the as-welded condition. Use low heat input with 409Nb/439 or 308L/430LNb type filler, pure argon shielding, and avoid nitrogen-bearing gases that cause coarse-grain embrittlement of the weld.
Can S43037 be formed, bent or molded?
Cold bending, roll forming and stretch forming are good (high r-value), but allow for anisotropy and ridging/roping on drawn surfaces. Keep bend radius ≥1t and avoid heavy deformation followed by long high-temperature exposure, which coarsens the grain.
What surface finishes work on S43037?
2B and BA rolled finishes, mechanical polishing, electropolishing and passivation all apply. The grade cannot be anodized; use chemical coloring or PVD for decorative shades, and always passivate after pickling to restore the passive film.
S43037 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, matched to stabilization | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.03 | 0 |
| Cr17–18% Cr class (439 family) | 17 – 19 | 17.5 |
| Niresidual | ≤ 0.5 | 0.25 |
| Timain stabilizer, usually Ti ≥ 0.20+4(C+N) | 0.15 – 0.5 | 0.25 |
| Nbsome modified types use Ti+Nb dual stabilization for weld toughness | ≤ 0.5 | 0.15 |
| Aldeoxidation residual | ≤ 0.15 | 0.03 |
| N | ≤ 0.03 | 0.02 |
| Fe | balance | — |
S43037 1/4H — frequently asked
What is S43037 1/4H used for?
S43037 1/4H is typically used for exhaust systems, appliance trim and heat exchanger housings. In short: most weldable ferritic stainless; stabilized 430 upgrade; 815 °C exhaust grade.
What is the yield strength of S43037 1/4H?
S43037 1/4H has a typical yield strength of 520 MPa (75.4 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 79% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is S43037 1/4H easy to machine?
Reasonably — machinability is rated fair (50/100, better than 90% of stainless steel grades). Machinability is slightly better than 304 but the chips still smear onto the tool: use sharp positive-rake tooling, high feed and plenty of emulsion coolant, and control depth of cut to limit the work-hardened layer and burr formation.
Can S43037 1/4H be welded?
Yes — weldability is rated very good (78/100). GTAW, GMAW, laser and high-frequency welding all work, and the Ti/Nb stabilization means no post-weld anneal is needed in the as-welded condition. Use low heat input with 409Nb/439 or 308L/430LNb type filler, pure argon shielding, and avoid nitrogen-bearing gases that cause coarse-grain embrittlement of the weld.
What surface finishes work on S43037 1/4H?
2B and BA rolled finishes, mechanical polishing, electropolishing and passivation all apply. The grade cannot be anodized; use chemical coloring or PVD for decorative shades, and always passivate after pickling to restore the passive film.
Can S43037 1/4H be formed, bent or molded?
Cold bending, roll forming and stretch forming are good (high r-value), but allow for anisotropy and ridging/roping on drawn surfaces. Keep bend radius ≥1t and avoid heavy deformation followed by long high-temperature exposure, which coarsens the grain.
What is the maximum service temperature of S43037 1/4H?
S43037 1/4H is rated for continuous use to about 500°C (932 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A268/A268M — Seamless and Welded Ferritic/Martensitic Stainless Steel Tubing — ASTM International (2022)
- ASTM A959 / SAE-AISI UNS designation system for stainless steels — ASTM International (2022)
- GB/T 3280 (022Cr17Ti / 022Cr17NbTi ) (2015)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Type 439 / 439HP ferritic stainless steel product data — AK Steel / Cleveland-Cliffs (2020)
- Ferritic stainless steels for automotive exhaust (441/439/436) — Outokumpu (2021)
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.