Stainless Steel XM-32
UNS S64512
A martensitic/precipitation-hardenable iron-base alloy registered under ASTM's XM trial designation system, used where high strength combined with moderate corrosion resistance is required in specialty fastener and structural applications.
Reference datasheet — XM-32 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the A condition
XM-32 tempers and conditions
XM-32 is supplied in 7 conditions, soft to hard. A is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ADefault Solution annealed | Pick for cold heading, machining and forming before a single low-temperature aging step. | 745 | 965 | 18 | 30 HRC | 2.2 % IACS |
Aged 593 °C (1100 °F) for 4 h | Lowest-strength aged condition; choose when maximum ductility and stress-corrosion resistance dominate. | 930 | 1,035 | 19 | 32 HRC | 2.3 % IACS |
Cold drawn | Cold-drawn wire/bar for cold-heading feedstock and as-drawn parts needing higher yield without aging. | 1,000 | 1,105 | 10 | 35 HRC | 2.2 % IACS |
Aged 4 h at 566 °C | Over-aged for maximum toughness and best SCC resistance at ~1100 MPa class strength. | 1,035 | 1,105 | 17 | 35 HRC | — |
Aged 4 h at 538 °C | Balanced strength/toughness condition for structural parts and moderately corrosive service. | 1,100 | 1,170 | 16 | 37 HRC | — |
Aged 4 h at 510 °C | Standard aging for cold-headed fasteners: high strength with better toughness than H900. | 1,140 | 1,210 | 15 | 39 HRC | — |
Aged 482 °C (900 °F) for 1 h, peak hardness | Highest strength/hardness condition for fasteners and shafts where ductility demands are modest. | 1,205 | 1,275 | 14 | 41 HRC | — |
What is XM-32?
A martensitic/precipitation-hardenable iron-base alloy registered under ASTM's XM trial designation system, used where high strength combined with moderate corrosion resistance is required in specialty fastener and structural applications. XM-32 has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 57% of stainless steel grades. It melts at 1,400°C (2,552 °F). XM-32 has a yield strength of 745 MPa (108 ksi) and a tensile strength of 965 MPa (140 ksi) — stronger than 93% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi).
What is XM-32 used for?
- High-strength bolts and studs
- Aerospace structural fittings
- Cold-headed screws and rivets
- Threaded rod and tie bars
- Machined shafts and pins
- Valve stems
- Load-carrying brackets
Advantages
- High strength — 745 MPa (108 ksi), better than 93% of stainless steel grades
- Easy to machine — 45/100, better than 84% of stainless steel grades
Limitations
- Limited ductility — 18%, worse than 83% of stainless steel grades
- Low fracture toughness — 90 MPa·√m (81.9 ksi·√in), worse than 75% of stainless steel grades
XM-32 properties
Typical room-temperature values for XM-32-A; bars are the position among stainless steel grades.
Physical3
XM-32 has a density of 7.78 g/cm³ (0.281 lb/in³), lighter than 57% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
XM-32 has a yield strength of 745 MPa (108 ksi) and a tensile strength of 965 MPa (140 ksi) — stronger than 93% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
XM-32 is rated for continuous service to 425°C (797 °F). It conducts heat at 18 W/m·K (10.4 BTU/hr·ft·°F), better than 73% of stainless steel grades. Thermal expansion is 10.8 µm/m·K (6 µin/in·°F).
Electrical3
XM-32 conducts electricity at 2.2 % IACS, worse than 61% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of XM-32 takes about 62 MJ of energy and emits 4.8 kg of CO₂ — more than 75% of stainless steel grades. Typical recycled content is 45%.
Manufacturability8
XM-32's machinability is fair (45/100, better than 84% of stainless steel grades); weldability good (55/100); formability good (60/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. XM-32 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with XM-32
Is XM-32 easy to machine?
Machine in condition A with rigid setups, sharp carbide, positive rake and 25–45 m/min; expect gummy chips and work hardening, finish-machine before or after aging with allowance for ~0.05 % growth.
Can XM-32 be welded?
Weldable by GTAW/PAW/EBW without preheat using matching or 17-4PH-type filler; re-solution treat and re-age for full joint strength, avoid heavy restraint on aged material.
Can XM-32 be formed, bent or molded?
Cold heading, upsetting and bending are best done in the annealed condition; hot work 1150 → 950 °C, then solution anneal ~1010 °C and air cool before aging.
XM-32 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 for cold formability | ≤ 0.05 | 0.03 |
| Cr | 14 – 14.5 | 14.3 |
| Ni | 6 – 7 | 6.5 |
| Tiprecipitation hardener (Ni3Ti) | 0.55 – 0.9 | 0.75 |
| Mn | ≤ 0.5 | 0.3 |
| Si | ≤ 0.3 | 0.2 |
| P | ≤ 0.04 | |
| S | ≤ 0.03 | |
| Febalance; composition per UNS registration of the 14Cr-6.5Ni-Ti PH type — verify against purchase specification | balance |
What surface finishes work on XM-32?
Passivate in citric or nitric acid after machining; takes a bright mechanical or electropolish, and hard chrome/electroless nickel are options — bake after plating to avoid hydrogen embrittlement in the aged condition.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel XM-32 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S64512
How much does XM-32 cost?
XM-32 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
XM-32 — frequently asked
What is XM-32 used for?
XM-32 is typically used for high-strength bolts and studs, aerospace structural fittings, cold-headed screws and rivets, threaded rod and tie bars, machined shafts and pins and valve stems. In short: age-hardening fastener stainless; strength above 410/420; direct 17-4 PH alternative.
What is the yield strength of XM-32?
XM-32 has a typical yield strength of 745 MPa (108 ksi) and a tensile strength of 965 MPa (140 ksi) — stronger than 93% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is XM-32 easy to machine?
Reasonably — machinability is rated fair (45/100, better than 84% of stainless steel grades). Machine in condition A with rigid setups, sharp carbide, positive rake and 25–45 m/min; expect gummy chips and work hardening, finish-machine before or after aging with allowance for ~0.05 % growth.
Can XM-32 be welded?
Yes — weldability is rated good (55/100). Weldable by GTAW/PAW/EBW without preheat using matching or 17-4PH-type filler; re-solution treat and re-age for full joint strength, avoid heavy restraint on aged material.
What surface finishes work on XM-32?
Passivate in citric or nitric acid after machining; takes a bright mechanical or electropolish, and hard chrome/electroless nickel are options — bake after plating to avoid hydrogen embrittlement in the aged condition.
Can XM-32 be formed, bent or molded?
Cold heading, upsetting and bending are best done in the annealed condition; hot work 1150 → 950 °C, then solution anneal ~1010 °C and air cool before aging.
What is the maximum service temperature of XM-32?
XM-32 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 XM-32-A and XM-32-H900?
A is the default condition — pick for cold heading, machining and forming before a single low-temperature aging step. H900: highest strength/hardness condition for fasteners and shafts where ductility demands are modest. Yield strength is 745 MPa in A versus 1,205 MPa in H900.
How much does XM-32 cost?
XM-32 is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- ASTM A564/A564M — Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes — ASTM International (2019)
- ASTM A705/A705M — Age-Hardening Stainless Steel Forgings — ASTM International (2018)
- ASTM A493 — Stainless Steel Wire and Wire Rod for Cold Heading and Cold Forging — ASTM International (2021)
- Metals & Alloys in the Unified Numbering System (UNS), S6xxxx series — SAE/ASTM (2017)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (PH stainless section) — ASM International (1990)
- Almar 362 (14Cr-6.5Ni-Ti precipitation-hardening stainless) technical data — Allegheny Ludlum / ATI (1995)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.