Stainless Steel SUS430J1L 1/4H
Supply condition
JIS SUS430J1L
1/4H = quarter hard
Choose when higher stiffness/dent resistance is needed and only mild forming follows.
Values for the 1/4H condition
Other SUS430J1L tempers and conditions
SUS430J1L is listed in 2 conditions; see the grade overview at SUS430J1L.
- 1/4H
- 1/2H
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
1/4HThis page Quarter hard | Choose when higher stiffness/dent resistance is needed and only mild forming follows. | 450 | 550 | 15 | 180 HB | 2.9 % IACS |
Half hard | Springy flat strip for clips, brackets and roll-formed profiles; deep drawing not possible. | 550 | 620 | 8 | 17 HRC | 2.9 % IACS |
What is SUS430J1L 1/4H?
SUS430J1L 1/4H is SUS430J1L supplied in the 1/4H condition — choose when higher stiffness/dent resistance is needed and only mild forming follows. SUS430J1L 1/4H has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 70% of stainless steel grades. Elongation at break is 15% and the elastic modulus is 200 GPa (29 Msi). SUS430J1L 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).
Advantages
- Easy to machine — 60/100, better than 98% of stainless steel grades
- Conducts heat well — 26 W/m·K (15 BTU/hr·ft·°F), better than 96% of stainless steel grades
- Low embodied carbon — 3.2 kg CO₂/kg, better than 95% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
Limitations
- Limited ductility — 15%, worse than 89% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
SUS430J1L 1/4H properties
Typical room-temperature values for SUS430J1L 1/4H; 21 are specific to this condition. Other listed values are SUS430J1L reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
SUS430J1L 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).
Mechanical13
SUS430J1L 1/4H has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 70% of stainless steel grades. Elongation at break is 15% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
SUS430J1L 1/4H is rated for continuous service to 400°C (752 °F). It conducts heat at 26 W/m·K (15 BTU/hr·ft·°F), better than 96% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
SUS430J1L 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 SUS430J1L 1/4H takes about 45 MJ of energy and emits 3.2 kg of CO₂ — less than 91% of stainless steel grades. Typical recycled content is 65%.
Manufacturability6
SUS430J1L 1/4H's machinability is good (60/100, better than 98% of stainless steel grades); weldability very good (75/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SUS430J1L 1/4H
Is SUS430J1L easy to machine?
Machines like Type 430 — moderate power, gummy chips; use sharp carbide, rigid setups and generous coolant, roughly 55 % of AISI 1212 speed.
Can SUS430J1L be welded?
Excellent for a ferritic: Nb stabilization plus ultra-low C+N avoids sensitization, so GTAW/laser/resistance welds need no post-weld anneal; limit heat input to control grain coarsening and use 430Nb or 309L filler.
Can SUS430J1L be formed, bent or molded?
Designed for single-stroke deep drawing — high r̄ value, low ridging/roping and low springback; still avoid sharp radii below ~1t and keep tooling clean to prevent galling.
What surface finishes work on SUS430J1L?
Takes 2B, BA, No.4 and mirror polish well; passivate or electropolish after forming, and do not anodize (ferrous alloy). Chloride-exposed parts benefit from regular rinsing.
SUS430J1L 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 |
|---|---|---|
| Cultra-low carbon | ≤ 0.03 | 0.01 |
| Si | ≤ 1 | 0.35 |
| Mn | ≤ 1 | 0.35 |
| P | ≤ 0.04 | — |
| S | ≤ 0.03 | — |
| Ni | ≤ 0.6 | 0.2 |
| Cr | 16 – 20 | 18 |
| Cuimproves corrosion resistance and drawability | 0.3 – 0.8 | 0.5 |
| Nbstabilizer; standard permits Ti/Zr combinations | 0.1 – 0.6 | 0.3 |
| N | ≤ 0.03 | 0.01 |
| Fe | balance | — |
SUS430J1L 1/4H — frequently asked
What is SUS430J1L 1/4H used for?
SUS430J1L 1/4H is typically used for kitchen sink bowls, deep-drawn appliance parts, building exterior cladding and cookware. In short: best-drawing ferritic stainless; sink-bowl pressing grade; no post-weld anneal needed.
What is the yield strength of SUS430J1L 1/4H?
SUS430J1L 1/4H has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 550 MPa (79.8 ksi) — stronger than 70% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is SUS430J1L 1/4H easy to machine?
Reasonably — machinability is rated good (60/100, better than 98% of stainless steel grades). Machines like Type 430 — moderate power, gummy chips; use sharp carbide, rigid setups and generous coolant, roughly 55 % of AISI 1212 speed.
Can SUS430J1L 1/4H be welded?
Yes — weldability is rated very good (75/100). Excellent for a ferritic: Nb stabilization plus ultra-low C+N avoids sensitization, so GTAW/laser/resistance welds need no post-weld anneal; limit heat input to control grain coarsening and use 430Nb or 309L filler.
What surface finishes work on SUS430J1L 1/4H?
Takes 2B, BA, No.4 and mirror polish well; passivate or electropolish after forming, and do not anodize (ferrous alloy). Chloride-exposed parts benefit from regular rinsing.
Can SUS430J1L 1/4H be formed, bent or molded?
Designed for single-stroke deep drawing — high r̄ value, low ridging/roping and low springback; still avoid sharp radii below ~1t and keep tooling clean to prevent galling.
What is the maximum service temperature of SUS430J1L 1/4H?
SUS430J1L 1/4H 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.
Sources
- JIS G4305 Cold-rolled stainless steel plate, sheet and strip — JSA (2021)
- JIS G4304 Hot-rolled stainless steel plate, sheet and strip — JSA (2021)
- ASM Handbook Vol.1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- Ferritic stainless steel sheet for sinks and appliances (430J1L class) — JFE Steel / Nippon Steel Stainless (2022)
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.