Stainless hlau - Qib 440 (UNS S44000)
Mar 03, 2026
Tso lus
Cov khoom tseem ceeb
Nqe lus hauv qab no tham txog cov khoom ntawm qib 440 bar cov khoom lag luam hauv qab ASTM A276. Cov txiaj ntsig no yuav tsis zoo ib yam li lwm cov ntaub ntawv xws li forgings thiab phaj.
Kev sib xyaw
Cov tshuaj muaj pes tsawg leeg ntawm ntau yam khoom ntawm qib 440 stainless hlau yog tabulated hauv qab no:
Table 1. Cov tshuaj muaj pes tsawg leeg ntawm qib 440 stainless hlau
|
Qib |
C |
Mn |
Si |
P |
S |
Cr |
Mo |
Ni |
N |
|
|
440A |
min. max. |
0.6 0.75 |
- 1 |
- 1 |
- 0.04 |
- 0.03 |
16 18 |
- 0.75 |
- |
- |
|
440B |
min. max. |
0.75 0.95 |
- 1 |
- 1 |
- 0.04 |
- 0.03 |
16 18 |
- 0.75 |
- |
- |
|
440C |
min. max. |
0.95 1.20 |
- 1 |
- 1 |
- 0.04 |
- 0.03 |
16 18 |
- 0.75 |
- |
- |
Mechanical Properties
Rooj 2.Mechanical zog ntawm qib 440C stainless hlau
|
Tempering kub (degree) |
Tensile zog (MPa) |
Yield Strength 0.2% Pov thawj (MPa) |
Elongation (% hauv 50mm) |
Hardness Rockwell (HR C) |
Impact Charpy V (J) |
|
Annealed * |
758 |
448 |
14 |
269 HB max # |
- |
|
204 |
2030 |
1900 |
4 |
59 |
9 |
|
260 |
1960 |
1830 |
4 |
57 |
9 |
|
316 |
1860 |
1740 |
4 |
56 |
9 |
|
371 |
1790 |
1660 |
4 |
56 |
9 |
* Annealed cov khoom yog raug rau Cov Mob A ntawm ASTM A276# Brinell hardness yog ASTM A276 teev siab tshaj plaws rau annealed 440A, B thiab C.
Lub cev muaj zog
Cov lus hauv qab no qhia txog lub cev lub cev ntawm qib 440 stainless hlau:
Table 3.Lub cev muaj zog ntawm qib 440 stainless hlau
|
Qib |
Qhov ceev (kg / m3) |
Elastic Modulus (GPa) |
Lub ntsiab lus Coefficient ntawm Thermal Expansion (μm / m / degree) |
Thermal conductivity (W / mK) |
Thaum tshav kub kub |
Hluav taws xob tiv thaiv (nΩ) |
|||
|
0-100 degree |
0-200 degree |
0-600 degree |
ntawm 100 degree |
ntawm 500 degree |
|||||
|
440A/B/C |
7650 |
200 |
10.1 |
10.3 |
11.7 |
24.2 |
- |
460 |
600 |
Xa kev nug