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Forgings, Fasteners, Boltings, Stud Bolts, Screws, Nuts
ASTM A582 specification covers hot-finished or cold-finished bars, except bars for forging (Note 1). It includes rounds, squares, and hexagons in the more commonly used types of stainless free-machining steels designed especially for optimum machinability and for general corrosion and hightemperature service. Stainless steel bars other (Note 2) than the free-machining types are covered in a separate specification.
| UNS DesignationA | Type | CB | MnB | P,B | SB | Si, max | Cr | Ni | Mo | Se | Other Elements |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Austenitic | |||||||||||
| S20300 | XM-1 | 0.08 | 5.00-6.50 | 0.04 | 0.18-0.35 | 1.00 | 16.00-18.00 | 5.00-6.50 | . . . | . . . | Cu 1.75-2.25 |
| S30300 | 303 | 0.15 | 2.00 | 0.20 | 0.15 min | 1.00 | 17.00-19.00 | 8.00-10.00 | . . . | . . . | . . . |
| S30310 | XM-5 | 0.15 | 2.50-4.50 | 0.20 | 0.25 min | 1.00 | 17.00-19.00 | 7.00-10.00 | . . . | . . . | . . . |
| S30323 | 303Se | 0.15 | 2.00 | 0.20 | 0.06 | 1.00 | 17.00-19.00 | 8.00-10.00 | . . . | 0.15 min | . . . |
| S30345 | XM-2 | 0.15 | 2.00 | 0.05 | 0.11-0.16 | 1.00 | 17.00-19.00 | 8.00-10.00 | 0.40-0.60 | . . . | Al 0.60-1.00 |
| Martensitic | |||||||||||
| S41600 | 416 | 0.15 | 1.25 | 0.06 | 0.15 min | 1.00 | 12.00-14.00 | . . . | . . . | . . . | . . . |
| S41610 | XM-6 | 0.15 | 1.50-2.50 | 0.06 | 0.15 min | 1.00 | 12.00-14.00 | . . . | . . . | . . . | . . . |
| S41623 | 416Se | 0.15 | 1.25 | 0.06 | 0.06 | 1.00 | 12.00-14.00 | . . . | . . . | 0.15 min | . . . |
| S42020 | 420F | 0.30-0.40 | 1.25 | 0.06 | 0.15 min | 1.00 | 12.00-14.00 | 0.50C | . . . | . . . | Cu 0.60 maxC |
| S42023 | 420FSe | 0.20-0.40 | 1.25 | 0.06 | 0.06 | 1.00 | 12.00-14.00 | 0.50C | . . . | 0.15 min | Cu 0.60 maxC |
| S44020 | 440F | 0.95-1.20 | 1.25 | 0.06 | 0.15 min | 1.00 | 16.00-18.00 | 0.50C | . . . | . . . | Cu 0.60 maxC |
| S44023 | 440FSe | 0.95-1.20 | 1.25 | 0.06 | 0.06 | 1.00 | 16.00-18.00 | 0.50C | . . . | 0.15 min | Cu 0.60 maxC |
| Ferritic | |||||||||||
| S18200 | XM-34 | 0.08 | 2.50 | 0.04 | 0.15 min | 1.00 | 17.50-19.50 | . . . | 1.50-2.50 | . . . | . . . |
| S18235 | . . . | 0.025 | 0.50 | 0.030 | 0.15-0.35 | 1.00 | 17.50-18.50 | 1.00 | 2.00-2.50 | . . . | Ti 0.30-1.00 N 0.025 max C+N 0.035 max |
| S41603 | . . . | 0.08 | 1.25 | 0.06 | 0.15 min | 1.00 | 12.00-14.00 | . . . | . . . | . . . | . . . |
| S43020 | 430F | 0.12 | 1.25 | 0.06 | 0.15 min | 1.00 | 16.00-18.00 | . . . | . . . | . . . | . . . |
| S43023 | 430FSe | 0.12 | 1.25 | 0.06 | 0.06 | 1.00 | 16.00-18.00 | . . . | . . . | 0.15 min | . . . |
| Types | Condition | HardnessA (HB) |
|---|---|---|
| All (except 440F, 440FSe and S18235) | A | 262 max |
| 416, 416Se, 420FSe, and XM-6 | T | 248 to 302 |
| 416, 416Se, and XM-6 | H | 293 to 352 |
| 440 F and 440FSe | A | 285 max |
| S18235 | A | 207 max |