38Cr2
1.7003Low-chromium (0.4–0.6% Cr) alloy steel for quenching and tempering with moderate hardenability. Economical alternative to higher-alloyed Cr steels for lighter-duty applications. Cold forging grade suitable for stressed machine and vehicle components, quenched-and-tempered screws, and bolts. Good machinability in annealed condition.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | AISI | USA | AISI 5140 | — | REF |
Sources: ASTM A29
Mechanical properties — Pro
QT
| Property | Value | Unit |
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| Tensile Strength | ||
| Yield Strength | ||
| Elongation | ||
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33CrMoV12-9
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S235J2W
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EN-GJS-500-7
5.3200Ferritic-pearlitic ductile cast iron with minimum tensile strength 500 MPa and minimum elongation 7%. The balanced grade offering significantly higher strength than EN-GJS-400-15 while retaining reasonable ductility. Mixed ferrite-pearlite matrix (typically 40-50% pearlite). Used for crankshafts, connecting rods, suspension components, gear housings, heavy-duty pipe fittings, and medium-stress structural castings. Equivalent to DIN GGG50, JIS FCD500.
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