13-8 Mo Stainless Steel Forgings
632, 5629, 5864, A564, A693, A705, 1.4534, S13800
Stainless steel-grade 13-8 is an age hardenable, precipitation stainless steel. This steel has good resistance to stress and general corrosion cracking, high transverse toughness and high strength obtained by a single low temperature heat treatment.
Stainless steels are known as high-alloy steels. These steels contain good corrosion resistance in comparison with other steels because they contain larger amounts of chromium.
Stainless steels are available in three different groups based on their crystalline structure. These groups include martensitic, austenitic and ferritic. The combination of martensitic and ferritic steels forms a fourth group of stainless steels known as precipitation-hardened steels.
13-8 Mo Stainless Steel Forgings Properties
13-8 Mo Forgings Chemical Requirements
| UNS Designation | Type | C | Mn | P | S | Si | Cr | Ni | Al | Mo | Ti | Cu | Other Elements |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S13800 | XM-13 | 0.05 | 0.20 | 0.010 | 0.008 | 0.10 | 12.25-13.25 | 7.50-S.50 | 0.90-1.35 | 2.00-2.50 | ... | ... | E |
13-8 Mo Forgings Mechanical Requirements
| Type | Condition | Suggested Hardening or Aging Treatment, or BothB,C,D | Applicable Thickness, in. and Test DirectionE | Tensile Strength, min | Yield Strength, minF | Elongation in 2 in. [50 mm] or 4D, min. % | Reduction of area, min, % | HardnessG | Impact Charpy-V, min | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temperature, °F [°C] | Time, h | QuenchH | ksi [MPa] | ksi [MPa] | Rockwell C, min | Brinell, min | ft·lbf | J | |||||
| XM-13 | H950 | 950 [510] | 4 | air cool | Up to 12 in. incl [300 mm] (L) | 220 [1515] | 205 [1415] | 10 | 45 | 45 | 430 | ... | ... |
| Up to 12 in. incl [300 mm] (T) | 35 | ||||||||||||
| H1000 | 1000 [540] | 4 | air cool | Up to 12 in. incl [300 mm] (L) | 205 [1415] | 190 [1310] | 10 | 50 | 43 | 400 | ... | ... | |
| Up to 12 in. incl [300 mm] (T) | 10 | 40 | |||||||||||
| H1025 | 1025 [550] | 4 | air cool | Up to 12 in. incl [300 mm] (L) | 185 [1280] | 175 [1210] | 11 | 50 | 41 | 380 | ... | ... | |
| Up to 12 in. incl [300 mm] (T) | 45 | ||||||||||||
| H1050 | 1050 [565] | 4 | air cool | Up to 12 in. incl [300 mm] (L) | 175 [1210] | 165 [1140] | 12 | 50 | 40 | 372 | ... | ... | |
| Up to 12 in. incl [300 mm] (T) | 45 | ||||||||||||
| H1100 | 1100 [595] | 4 | air cool | Up to 12 in. incl [300 mm] (L) | 150 [1035] | 135 [930] | 14 | 50 | 34 | 313 | ... | ... | |
| Up to 12 in. incl [300 mm] (T) | 50 | ||||||||||||
| H1150 | 1150 [620] | 4 | air cool | Up to 12 in. incl [300 mm] (L) | 135 [930] | 90 [620] | 14 | 50 | 30 | 283 | ... | ... | |
| Up to 12 in. incl [300 mm] (T) | 50 | ||||||||||||
| H1150M | M 1400 [760] | for 2 h, | air cool plus | Up to 12 in. incl [300 mm] (L) | 125 [860] | 85 [585] | 16 | 55 | 26 | 259 | ... | ... | |
| 1150 [620] | for 4 h, | air cool | Up to 12 in. incl [300 mm] (T) | 55 | |||||||||