ASTM A564 Age-Hardening Stainless Steel Bars
- Grade: 630 (S17400), 631 (S17700), 632 (S15700), 634 (S35500), 635 (S17600), XM-12 (S15500), XM-13 (S13800), XM-16 (S45500), and XM-25 (S45000)
- Manufacturing Methods: Hot-finished or cold-finished
- Shapes: Rounds, Squares, Hexagons, Bar shapes, Angles, Tees, and Channels
ASTM A564/A564M Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes
ASTM A564/A564M hot-rolled and cold-finished age-hardening stainless steel bars and shapes are engineered for applications that require high strength, excellent corrosion resistance, and reliable dimensional stability after heat treatment. Manufactured to meet stringent ASTM A564/A564M standards, these materials offer outstanding mechanical properties, good machinability, and consistent quality for demanding components in aerospace, defense, automotive, tooling, and industrial engineering sectors. Available in a range of grades and profiles, ASTM A564/A564M bars and shapes provide a durable and versatile solution for critical parts where performance, precision, and long service life are essential.
ASTM A564/A564M Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes Chemical Composition (wt.%)
| UNS No. | Type | C (max) | Mn (max) | P (max) | S (max) | Si (max) | Cr | Ni | Al | Mo | Ti | Cu |
| S17400 | 630 | 0.07 | 1.00 | 0.04 | 0.03 | 1.00 | 15.00-17.50 | 3.00-5.00 | – | – | – | 3.00-5.00 |
| S17700 | 631 | 0.09 | 1.00 | 0.04 | 0.03 | 1.00 | 16.00-18.00 | 6.50-7.75 | 0.75-1.50 | – | – | – |
| S15700 | 632 | 0.09 | 1.00 | 0.04 | 0.03 | 1.00 | 14.00-16.00 | 6.50-7.75 | 0.75-1.50 | 2.00-3.00 | – | – |
| S35500 | 634 | 0.10-0.15 | 0.50-1.25 | 0.04 | 0.03 | 0.50 | 15.00-16.00 | 4.00-5.00 | – | 2.50-3.25 | – | – |
| S17600 | 635 | 0.08 | 1.00 | 0.04 | 0.03 | 1.00 | 16.00-17.50 | 6.00-7.50 | 0.4 | – | 0.40-1.20 | – |
| S15500 | XM-12 | 0.07 | 1.00 | 0.04 | 0.03 | 1.00 | 14.00-15.50 | 3.50-5.50 | – | – | – | 2.50-4.50 |
| S13800 | XM-13 | 0.05 | 0.20 | 0.01 | 0.008 | 0.10 | 12.25-13.25 | 7.50-8.50 | 0.90-1.35 | 2.00-2.50 | – | – |
| S45500 | XM-16 | 0.03 | 0.50 | 0.015 | 0.015 | 0.50 | 11.00-12.50 | 7.50-9.50 | – | 0.5 | 0.90-1.40 | 1.50-2.50 |
| S45503 | – | 0.01 | 0.50 | 0.01 | 0.01 | 0.20 | 11.00-12.50 | 7.50-9.50 | – | 0.5 | 1.00-1.35 | 1.50-2.50 |
| S45000 | XM-25 | 0.05 | 1.00 | 0.03 | 0.03 | 1.00 | 14.00-16.00 | 5.00-7.00 | – | 0.50-1.00 | – | 1.25-1.75 |
ASTM A564/A564M Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes Mechanical Properties
| UNS No. | Type | Condition | Aging Treatment | Tensile Strength, min (ksi) | Yield Strength, min (ksi) | Elongation in 2 in., min % | Reduction of Area, min % | Hardness (Rockwell C) |
| S17400 | 630 | H900 | 900°F (480°C) / 1h | 190 | 170 | 10 | 35 | 40 |
| S17400 | 630 | H1025 | 1025°F (550°C) / 4h | 155 | 145 | 12 | 45 | 35 |
| S17400 | 630 | H1150 | 1150°F (620°C) / 4h | 135 | 105 | 16 | 50 | 28 |
| S17700 | 631 | H1050 | 1050°F (565°C) / 4h | 170 | 150 | 10 | 40 | 35 |
| S15700 | 632 | H925 | 925°F (495°C) / 4h | 170 | 155 | 10 | 38 | 38 |
| S35500 | 634 | H1000 | 1000°F (540°C) / 4h | 180 | 160 | 8 | 30 | 37 |
| S17600 | 635 | H1050 | 1050°F (565°C) / 4h | 170 | 150 | 10 | 40 | 35 |
| S15500 | XM-12 | H900 | 900°F (480°C) / 1h | 190 | 170 | 10 | 35 | 40 |
| S13800 | XM-13 | H1025 | 1025°F (550°C) / 4h | 155 | 145 | 12 | 45 | 35 |
| S45500 | XM-16 | H1150 | 1150°F (620°C) / 4h | 135 | 105 | 16 | 50 | 28 |
| S45000 | XM-25 | H900 | 900°F (480°C) / 1h | 190 | 170 | 10 | 35 | 40 |
Features
- ASTM A564/A564M Age-Hardening Stainless Steel Bars and Shapes in precipitation-hardening grades (e.g., 630/S17400, 631/S17700, XM-12/S15500 etc.).
- Exceptional high strength achieved through age-hardening heat treatment (conditions such as H900, H1025, H1150) with tensile strengths up to 190 ksi.
- Balanced corrosion resistance combined with excellent toughness and fatigue performance in demanding environments.
- Available in hot-finished and cold-finished forms with wide dimensional range (rounds up to 12 in / 304.8 mm, squares/hexagons/angles/tees/channels).
- Good weldability, machinability, and fabrication characteristics in solution-annealed or aged conditions.
- Full traceability with EN 10204 Type 3.1 / 3.2 certification and comprehensive testing (tensile, hardness, chemical analysis, intergranular corrosion, ultrasonic).
- Superior strength-to-weight ratio and dimensional stability after aging for precision components.
- Custom sizes, special heat treatments, and shapes available to meet project-specific high-performance requirements.
Technical Specifications
| Specification | Value |
| Standard | ASTM A564/A564M Hot-Rolled and Cold-Finished Age-Hardening Stainless Steel Bars and Shapes |
| Grade | 630 (S17400), 631 (S17700), 632 (S15700), 634 (S35500), 635 (S17600), XM-12 (S15500), XM-13 (S13800), XM-16 (S45500), and XM-25 (S45000) |
| Delivery Condition | Annealed, Solution Hardening or Aging |
| MFG. Methods | Hot-finished or cold-finished |
| Shape of Bars | Rounds, Squares, Hexagons, Bar shapes, Angles, Tees, and Channels |
| Density | 7.93 – 7.98g/cm³ |
| Dimension | Rounds Diameter Range: 1/8 inch (3.18 mm) to 12 inches (304.8 mm) Squares Side Length Range: 1/4 inch (6.35 mm) to 6 inches (152.4 mm) Hexagons Flat-to-Flat Range: 1/4 inch (6.35 mm) to 6 inches (152.4 mm) Angles Leg Length Range: 1/2 inch (12.7 mm) to 6 inches (152.4 mm) Thickness Range: 1/8 inch (3.18 mm) to 3/4 inch (19.05 mm) T-Shapes Leg Length Range: 1 inch (25.4 mm) to 3 inches (76.2 mm) Thickness Range: 1/8 inch (3.18 mm) to 1/2 inch (12.7 mm) Channels Flange Width Range: 3/4 inch (19.05 mm) to 3 inches (76.2 mm) Web Height Range: 1 inch (25.4 mm) to 4 inches (101.6 mm) Thickness Range: 1/8 inch (3.18 mm) to 3/8 inch (9.53 mm) |
| Inspection Certificate | EN 10204 Type 3.1 (Mill Test Certificate), EN 10204 Type 3.2 (Witness Testing or 3rd Party Inspection) |
| Tests | Chemical Analysis, Tensile Test, Hardness Test, Visual and Dimensional Inspection, Intergranular Corrosion Test, Impact Test, Ultrasonic Testing |
Applications
- Aerospace structural components, compressor blades, turbine parts, and high-stress engine fasteners requiring high strength and corrosion resistance.
- Chemical processing equipment, valves, pump shafts, and reactor components exposed to corrosive media.
- Nuclear reactor parts and high-temperature oxidation-resistant components in power generation.
- High-performance fasteners, bolts, screws, and springs in aerospace, automotive, and industrial machinery.
- Medical and surgical instruments, high-toughness implants, and sterile environment hardware.
- Oil & gas and marine shafts, fittings, and load-bearing parts needing fatigue and stress-corrosion resistance.
- Precision bars, forgings, and machined shapes for critical high-strength engineering assemblies after proper age-hardening heat treatment.
