Stainless Steel SUS317J1 3/4H
Supply condition
JIS SUS317J1
3/4H = three-quarter hard
High-strength strip for flat springs and shims with only simple bending needed.
Values for the 3/4H condition
Other SUS317J1 tempers and conditions
SUS317J1 is listed in 8 conditions; see the grade overview at SUS317J1.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot Rolled Annealed & Pickled plate | Thick plate for vessels, tube sheets and weldments; scale removed by pickling, dull matte surface. | 275 | 570 | 50 | 155 HB | 2 % IACS |
ANNDefault Annealed | Standard stocked condition for plate, pipe, bar and tube; maximum corrosion resistance and ductility. | 285 | 580 | 50 | 160 HB | — |
Cold Rolled Annealed, 2B finish | Standard cold-rolled sheet/coil finish for chemical equipment fabrication and deep drawing. | 295 | 590 | 48 | 165 HB | 2 % IACS |
Cold drawn | Round/hex bar for machined fittings and shafts; better tolerance and surface than hot-rolled bar with modest strength gain. | 480 | 700 | 30 | 17 HRC | 2 % IACS |
Quarter hard | Light cold work for springy sheet parts and clamps where some formability is still required. | 550 | 860 | 15 | 23 HRC | 2 % IACS |
Half hard | Medium temper for structural strip, springs and wear-resistant linings. | 760 | 1,030 | 10 | 32 HRC | 2 % IACS |
3/4HThis page Three-quarter hard | High-strength strip for flat springs and shims with only simple bending needed. | 930 | 1,170 | 6 | 37 HRC | 2 % IACS |
Full hard | Maximum cold-worked strength for flat springs, blades and abrasion linings; essentially not formable. | 1,000 | 1,280 | 4 | 41 HRC | 2 % IACS |
What is SUS317J1 3/4H?
SUS317J1 3/4H is SUS317J1 supplied in the 3/4H condition — high-strength strip for flat springs and shims with only simple bending needed. SUS317J1 3/4H has a yield strength of 930 MPa (135 ksi) and a tensile strength of 1,170 MPa (170 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 195 GPa (28.3 Msi). SUS317J1 3/4H has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,375°C (2,507 °F). ANN is the default condition FabDigit quotes; 3/4H is available on request or by drawing note.
Advantages
- High strength — 930 MPa (135 ksi), better than 98% of stainless steel grades
- Polishes to a fine finish — 80/100, better than 89% of stainless steel grades
- Good corrosion resistance — 74/100, better than 78% of stainless steel grades
Limitations
- Limited ductility — 6%, worse than 99% of stainless steel grades
- Difficult to machine — 25/100, worse than 88% of stainless steel grades
- Limited service temperature — 320°C (608 °F), worse than 85% of stainless steel grades
- Limited formability — 25/100, worse than 78% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
SUS317J1 3/4H properties
Typical room-temperature values for SUS317J1 3/4H; 23 are specific to this condition. Other listed values are SUS317J1 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
SUS317J1 3/4H has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,375°C (2,507 °F).
Mechanical15
SUS317J1 3/4H has a yield strength of 930 MPa (135 ksi) and a tensile strength of 1,170 MPa (170 ksi) — stronger than 98% of stainless steel grades. Elongation at break is 6% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
SUS317J1 3/4H is rated for continuous service to 320°C (608 °F). It conducts heat at 14 W/m·K (8.09 BTU/hr·ft·°F), worse than 80% of stainless steel grades. Thermal expansion is 16 µm/m·K (8.89 µin/in·°F).
Electrical3
SUS317J1 3/4H conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (74/100), better than 78% of stainless steel grades.
Sustainability4
Producing a kilogram of SUS317J1 3/4H takes about 58 MJ of energy and emits 5.5 kg of CO₂ — more than 66% of stainless steel grades. Typical recycled content is 60%.
Manufacturability7
SUS317J1 3/4H's machinability is poor (25/100, worse than 88% of stainless steel grades); weldability good (62/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SUS317J1 3/4H
Is SUS317J1 easy to machine?
Gummy and strongly work-hardening — use rigid setups, positive-rake sharp carbide, heavy positive feed to cut under the hardened layer, ~30–40 % of 1212 speeds and flood coolant.
Can SUS317J1 be welded?
Readily welded by GTAW/GMAW/SMAW with low heat input and no preheat; use overalloyed filler (ER317L, or 625/Alloy 22 for maximum pitting resistance) and back-purge, then pickle/passivate.
Can SUS317J1 be formed, bent or molded?
Excellent cold formability but high work-hardening and springback; needs ~50 % more press force than carbon steel, and heavily formed parts benefit from re-solution annealing at 1050–1150 °C with rapid quench.
What surface finishes work on SUS317J1?
Not anodizable — finish by pickling (HNO₃/HF), passivation to ASTM A967, mechanical polishing to mirror or electropolishing for chemical/hygienic surfaces.
SUS317J1 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 |
|---|---|---|
| CJIS G4304 max 0.08 %; most mills supply ≤0.04 % | ≤ 0.08 | 0.04 |
| Si | ≤ 1 | 0.5 |
| Mn | ≤ 2.5 | 1.3 |
| P | ≤ 0.05 | 0.03 |
| S | ≤ 0.03 | 0 |
| Ni | 15 – 17 | 16 |
| Cr | 16 – 19 | 17.5 |
| Mohigh Mo gives PREN ≈ 34–36 | 4 – 6 | 5 |
| Fe | balance | — |
SUS317J1 3/4H — frequently asked
What is SUS317J1 3/4H used for?
SUS317J1 3/4H is typically used for marine equipment, chemical process tanks and pulp and paper machinery. In short: higher-Mo than 316L; JIS marine/chemical grade; limited stock, higher cost.
What is the yield strength of SUS317J1 3/4H?
SUS317J1 3/4H has a typical yield strength of 930 MPa (135 ksi) and a tensile strength of 1,170 MPa (170 ksi) — stronger than 98% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is SUS317J1 3/4H easy to machine?
Not especially — machinability is rated poor (25/100, worse than 88% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, positive-rake sharp carbide, heavy positive feed to cut under the hardened layer, ~30–40 % of 1212 speeds and flood coolant.
Can SUS317J1 3/4H be welded?
Yes — weldability is rated good (62/100). Readily welded by GTAW/GMAW/SMAW with low heat input and no preheat; use overalloyed filler (ER317L, or 625/Alloy 22 for maximum pitting resistance) and back-purge, then pickle/passivate.
What surface finishes work on SUS317J1 3/4H?
Not anodizable — finish by pickling (HNO₃/HF), passivation to ASTM A967, mechanical polishing to mirror or electropolishing for chemical/hygienic surfaces.
Can SUS317J1 3/4H be formed, bent or molded?
Excellent cold formability but high work-hardening and springback; needs ~50 % more press force than carbon steel, and heavily formed parts benefit from re-solution annealing at 1050–1150 °C with rapid quench.
What is the maximum service temperature of SUS317J1 3/4H?
SUS317J1 3/4H is rated for continuous use to about 320°C (608 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between SUS317J1-ANN and SUS317J1-FH?
ANN is the default condition — standard stocked condition for plate, pipe, bar and tube; maximum corrosion resistance and ductility. FH: maximum cold-worked strength for flat springs, blades and abrasion linings; essentially not formable. Yield strength is 285 MPa in ANN versus 1,000 MPa in FH.
Sources
- JIS G4304 — Hot-rolled stainless steel plate, sheet and strip — JSA (2021)
- JIS G4305 — Cold-rolled stainless steel plate, sheet and strip — JSA (2021)
- JIS G4303 — Stainless steel bars — JSA (2021)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Specialty Handbook — Stainless Steels — ASM International (1994)
- High-molybdenum austenitic stainless (317L/317LMN) data sheets — Outokumpu / 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.