Stainless Steel S28200 1/2H
Supply condition
UNS S28200
1/2H = half hard
Highest practical strength condition for wear pins, springs and threaded parts; forming must be minimal.
Values for the 1/2H condition
Other S28200 tempers and conditions
S28200 is listed in 5 conditions; see the grade overview at S28200.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault solution annealed (~1040–1120 °C, water quenched) | Standard stocked condition for bar, plate and wire; best ductility and corrosion resistance, galling resistance already fully developed. | 448 | 760 | 50 | 210 HB | — |
Hot rolled | Mill condition for heavy bar and plate that will be machined and, where corrosion matters, subsequently solution annealed. | 480 | 790 | 42 | 220 HB | — |
Quarter hard | Use when moderate strength increase is needed while keeping useful bend ductility for formed parts. | 585 | 860 | 32 | 24 HRC | — |
Cold drawn | Pick for straight, close-tolerance bar and for higher strength shafts, pins and fasteners where some ductility can be traded away. | 690 | 965 | 25 | 27 HRC | — |
1/2HThis page Half hard | Highest practical strength condition for wear pins, springs and threaded parts; forming must be minimal. | 760 | 1,030 | 18 | 32 HRC | — |
What is S28200 1/2H?
S28200 1/2H is S28200 supplied in the 1/2H condition — highest practical strength condition for wear pins, springs and threaded parts; forming must be minimal. S28200 1/2H has a yield strength of 760 MPa (110 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 94% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi). S28200 1/2H has a density of 7.63 g/cm³ (0.276 lb/in³), lighter than 96% of stainless steel grades. It melts at 1,370°C (2,498 °F). Annealed is the default condition FabDigit quotes; 1/2H is available on request or by drawing note.
Advantages
- High strength — 760 MPa (110 ksi), better than 94% of stainless steel grades
Limitations
- Limited ductility — 18%, worse than 83% of stainless steel grades
- Difficult to weld — 45/100, worse than 79% 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
S28200 1/2H properties
Typical room-temperature values for S28200 1/2H; 19 are specific to this condition. Other listed values are S28200 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S28200 1/2H has a density of 7.63 g/cm³ (0.276 lb/in³), lighter than 96% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical13
S28200 1/2H has a yield strength of 760 MPa (110 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 94% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S28200 1/2H is rated for continuous service to 425°C (797 °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 16.2 µm/m·K (9 µin/in·°F).
Electrical3
S28200 1/2H conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of S28200 1/2H takes about 55 MJ of energy and emits 4.5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
S28200 1/2H's machinability is poor (26/100, worse than 84% of stainless steel grades); weldability fair (45/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S28200 1/2H
Is S28200 easy to machine?
Machine like a work-hardening austenitic: rigid setup, sharp positive-rake carbide, heavy positive feed with no dwell, ~30 % of 1212 speeds, flood coolant; the 4 % Si is abrasive on tooling.
Can S28200 be welded?
Weldable by GTAW/GMAW/SMAW with matching Gall-Tough or 309/312 filler; keep heat input and interpass temperature low to limit hot cracking, no preheat, no post-weld heat treatment normally required.
Can S28200 be formed, bent or molded?
Cold forms and bends well when annealed but work-hardens very rapidly — allow larger bend radii, higher press tonnage and interstage anneals; hot work 1150–1200 °C, finish above ~950 °C then solution anneal.
What surface finishes work on S28200?
Passivate per ASTM A967 (nitric or citric) or electropolish; surfaces run against it need no plating — the alloy is normally used bare to replace hard chrome or cobalt hardfacing.
S28200 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 |
|---|---|---|
| C | ≤ 0.15 | 0.06 |
| Mnaustenite stabiliser, replaces Ni | 11 – 14 | 12.5 |
| Sikey to galling resistance | 3.5 – 4.5 | 4 |
| Cr | 16 – 18 | 17 |
| Ni | 0.5 – 2.5 | 1 |
| Nsolid-solution strengthening | 0.08 – 0.2 | 0.14 |
| P | ≤ 0.05 | — |
| S | ≤ 0.03 | — |
| Fe | balance | — |
S28200 1/2H — frequently asked
What is S28200 1/2H used for?
S28200 1/2H is typically used for fasteners, pump and valve shafts/stems, food processing hardware and wear-prone fittings. In short: best anti-galling austenitic; replaces cobalt hardfacing; lower corrosion resistance than 304.
What is the yield strength of S28200 1/2H?
S28200 1/2H has a typical yield strength of 760 MPa (110 ksi) and a tensile strength of 1,030 MPa (149 ksi) — stronger than 94% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is S28200 1/2H easy to machine?
Not especially — machinability is rated poor (26/100, worse than 84% of stainless steel grades). Machine like a work-hardening austenitic: rigid setup, sharp positive-rake carbide, heavy positive feed with no dwell, ~30 % of 1212 speeds, flood coolant; the 4 % Si is abrasive on tooling.
Can S28200 1/2H be welded?
With care — weldability is rated fair (45/100). Weldable by GTAW/GMAW/SMAW with matching Gall-Tough or 309/312 filler; keep heat input and interpass temperature low to limit hot cracking, no preheat, no post-weld heat treatment normally required.
What surface finishes work on S28200 1/2H?
Passivate per ASTM A967 (nitric or citric) or electropolish; surfaces run against it need no plating — the alloy is normally used bare to replace hard chrome or cobalt hardfacing.
Can S28200 1/2H be formed, bent or molded?
Cold forms and bends well when annealed but work-hardens very rapidly — allow larger bend radii, higher press tonnage and interstage anneals; hot work 1150–1200 °C, finish above ~950 °C then solution anneal.
What is the maximum service temperature of S28200 1/2H?
S28200 1/2H is rated for continuous use to about 425°C (797 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S28200 Annealed and S28200-CD?
Annealed is the default condition — standard stocked condition for bar, plate and wire; best ductility and corrosion resistance, galling resistance already fully developed. CD: pick for straight, close-tolerance bar and for higher strength shafts, pins and fasteners where some ductility can be traded away. Yield strength is 448 MPa in Annealed versus 690 MPa in CD.
Sources
- Gall-Tough Stainless Steel (UNS S28200) Product Data Bulletin — Armco/AK Steel Specialty Steel (2007)
- ASTM A276/A276M Stainless Steel Bars and Shapes — ASTM International (2023)
- ASTM A967 Chemical Passivation Treatments for Stainless Steel Parts — ASTM International (2017)
- 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)
- UNS S28200 alloy record, Metals & Alloys in the Unified Numbering System — SAE/ASTM (2017)
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.