SCM415 SCM430 SCM440 Alloy Steel Plate
Product details
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JIS G4053：机械结构用低合金钢《Low-alloyed steels for machine structural use》
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JIS G4105：铬钼钢《Chromium molybdenum steels》
Grades
SCM415 SCM440 SCM430
Chemical Composition (wt%)
| Element | SCM415 | SCM430 | SCM440 |
|---|---|---|---|
| C | 0.13–0.18 | 0.28–0.33 | 0.38–0.43 |
| Si | 0.15–0.35 | 0.15–0.35 | 0.15–0.35 |
| Mn | 0.60–0.85 | 0.60–0.90 | 0.60–0.85 |
| P, max | 0.030 | 0.030 | 0.030 |
| S, max | 0.030 | 0.030 | 0.030 |
| Cr | 0.90–1.20 | 0.90–1.20 | 0.90–1.20 |
| Mo | 0.15–0.30 | 0.15–0.30 | 0.15–0.30 |
| Ni, max | 0.25 | 0.25 | 0.25 |
| Cu, max | 0.30 | 0.30 | 0.30 |
Mechanical Properties
| Property | SCM415 | SCM430 | SCM440 |
|---|---|---|---|
| Tensile Strength (MPa) | ≥ 440 (Annealed) / ≥ 850 (Quenched & Tempered) | ≥ 930 | ≥ 980 |
| Yield Strength (MPa), min | ≥ 295 (Annealed) / ≥ 685 (Quenched & Tempered) | ≥ 785 | ≥ 835 |
| Elongation (%), min (50 mm gage) | ≥ 22 (Annealed) / ≥ 15 (Quenched & Tempered) | ≥ 14 | ≥ 12 |
| Reduction of Area (%), min | ≥ 50 (Annealed) / ≥ 45 (Quenched & Tempered) | ≥ 45 | ≥ 45 |
| Hardness (HBW) | ≤ 179 (Annealed) / 241–285 (Quenched & Tempered) | 269–302 | 285–352 |
| Charpy Impact (J/cm²), min | ≥ 118 (Annealed) | ≥ 69 | ≥ 59 |
Typical Applications
SCM415
- General mechanical parts: Gears, shafts, pins and spline shafts for light & medium load.
- Pressure & thermal equipment: Low-to-medium temperature boiler parts, vessel accessories, pipe fittings and flanges.
- Automotive industry: Transmission components, engine parts and chassis parts after carburizing heat treatment.
- Other uses: Machinery components requiring good wear resistance and impact resistance.
SCM430
- Mechanical transmission: Medium-load gears, drive shafts, worm gears and bearing components.
- Industrial equipment: Structural parts for general machinery, hydraulic components and pump parts.
- Energy & pressure equipment: Medium-temperature pressure vessel attachments, valve bodies and pipeline parts.
- Automotive & engineering machinery: Axles, connecting rods and suspension parts.
SCM440
- Heavy machinery: Heavy-duty gears, high-load shafts, spindles and rolling parts.
- Tool & mould industry: Components demanding high surface hardness and anti-abrasion property.
- Pressure & power equipment: High-strength fasteners, heavy-duty valve parts and structural members for high-pressure devices.
- Transportation: High-loa
Machinable type
Other Standards we could provide:
HSLA Steel Grades available to Cut to shape
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Standard |
Grade |
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ASME SA36/ASTM A36 |
A36 |
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ASME SA283/ASTM A283 |
A283 Grade C |
A283 Grade D |
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ASME SA572/ASTM A572 |
A572 Grade 42 |
A572 Grade 50 |
A572 Grade 55 |
A572 Grade 60 |
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A572 Grade 65 |
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ASME SA573/ASTM A573 |
A573 Grade 58 |
A573 Grade 65 |
A573 Grade 70 |
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ASME SA633/ASTM A633 |
A633 Grade A |
A633 Grade C |
A633 Grade D |
A633 Grade E |
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ASME SA656/ASTM A656 |
A656 Grade 50 |
A656 Grade 60 |
A656 Grade 70 |
A656 Grade 80 |
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A656 Grade 100 |
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EN10025-2 |
S235JR |
S235J0 |
S235J2 |
S275JR |
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S275J0 |
S275J2 |
S355JR |
S355J0 |
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S355J2 |
S355K2 |
S450J0 |
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EN10025-3 |
S275N |
S275NL |
S355N |
S355NL |
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S420N |
S420NL |
S460N |
S460NL |
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EN10025-4 |
S275M |
S275ML |
S355M |
S420ML |
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S355ML |
S460M |
S420M |
S460ML |
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EN10025-6 |
S460Q |
S460QL |
S460QL1 |
S500Q |
|
S500QL |
S500QL1 |
S550Q |
S550QL |
|
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S550QL1 |
S620Q |
S620QL |
S620QL1 |
|
|
S690Q |
S690QL |
S890Q |
S690QL1 |
|
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S890QL |
S890QL1 |
S960Q |
S960QL |
|
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JIS G3101 |
SS330 |
SS400 |
SS490 |
SS540 |
|
JIS G3106 |
SM400A |
SM400B |
SM400C |
SM490A |
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SM490B |
SM490C |
SM490YA |
SM490YB |
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SM520B |
SM520C |
SM570 |
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JIS G4051 |
S20C |
S25C |
S30C |
S35C |
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S40C |
S45C |
S50C |
S55C |
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S60C |
S65C |
S70C |
S75C |
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DIN 17100 |
St37-2 |
USt37-2 |
RSt37-2 |
St37-3 |
|
St52-3 |
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DIN 17102 |
StE255 |
WStE255 |
TStE255 |
EStE255 |
|
StE285 |
WStE285 |
TStE285 |
EStE285 |
|
|
StE315 |
WStE315 |
TStE315 |
EStE315 |
|
|
StE355 |
WStE355 |
TStE355 |
EStE355 |
|
|
StE380 |
WStE380 |
TStE380 |
EStE380 |
|
|
StE420 |
WStE420 |
TStE420 |
EStE420 |
|
|
StE460 |
WStE460 |
TStE460 |
EStE460 |
|
|
StE500 |
WStE500 |
TStE500 |
EStE500 |
|
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GB/T700 |
Q195 |
Q235A |
Q235B |
Q235C |
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Q235D |
Q275 |
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GB/T1591 |
Q355B |
Q355C |
Q355D |
Q390B |
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Q390C |
Q420B |
Q420C |
Q460C |
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Q390N |
Q420N |
Q460N |
Q390M |
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Q420M |
Q460M |
Q550M |
Q620M |
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Q690M |
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GB/T16270 |
Q460C |
Q460D |
Q460E |
Q460F |
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Q500C |
Q500D |
Q500E |
Q500F |
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Q550C |
Q550D |
Q550E |
Q550F |
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Q620C |
Q620D |
Q620E |
Q620F |
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Q690C |
Q690D |
Q690E |
Q690F |
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Q800C |
Q800D |
Q800E |
Q800F |
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Q890C |
Q890D |
Q890E |
Q890F |
|
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Q960C |
Q960D |
Q960E |
Q960F |
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Package&Shipping
By bundles, each bundle weight under 3 tons, for small outer
Diameter round bar, each bundle with 4 - 8 steel strips.
20 feet container contains dimension, length under 6000mm
40 feet container contains dimension, length under 12000mm
By bulk vessel, Freight charge is low by bulk cargo, and large
Heavy sizes can not be loaded into containers can shipping by bulk cargo
Quality Assurance
1.Strict according to Requirements
2.Sample: Sample is available.
3. Tests: Salt spray test/Tensile test / Eddy current / Chemical composition test according to customers' request
4.Certificate: IATF16949, ISO9001, SGS etc.
5. EN 10204 3.1 Certification
