DIN 17100 ST37/ST52 Carbon Steel Plate: Structural Integrity & Technical Specifications
Material Overview & Key Features
DIN 17100 ST37/ST52 defines general-purpose structural steel plates for welded/riveted frameworks in construction and heavy machinery. With grades ST37-2 (yield ≥235 MPa) and ST52-3 (yield ≥355 MPa), these steels prioritize cost-effective fabrication and low-temperature performance (-20°C).
Core Advantages:
- Weldability: CEV* ≤0.40 (EN 1011-2 compliant).
- Global Equivalents: ASTM A36 (ST37-2), EN 10025-2 S355JR (ST52-3), JIS G3101 SS540.
- Zero Heat Treatment: Delivered in normalized/as-rolled condition.
Technical Specifications
1. Chemical Composition (Selected Grades)
| Grade | C ≤ | Mn ≤ | P ≤ | S ≤ | CEV* | Impact (-20°C) |
|---|---|---|---|---|---|---|
| ST37-2 | 0.17 | 1.40 | 0.050 | 0.050 | 0.32 | 27 J |
| ST52-3 | 0.22 | 1.60 | 0.040 | 0.040 | 0.45 | 40 J |
| *CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 |
2. Mechanical Properties
| Grade | Thickness (mm) | Yield (MPa) | Tensile (MPa) | Elongation (%) |
|---|---|---|---|---|
| ST37-2 | ≤16 | 235 | 360–510 | 22 |
| ST52-3 | ≤40 | 355 | 490–630 | 18 |
Physical Properties:
- Density: 7.85 g/cm³ (0.284 lb/in³)
- Thermal Conductivity: 50 W/m·K (20°C)
Production & Fabrication
1. Manufacturing Methods
- Hot Rolling: Final thickness tolerance ±1.5% (DIN EN 10029).
- Cold Forming: Max bend radius = 2x thickness (ST37-2).
2. Surface Treatments
| Process | Technical Parameters | Industry Use Case |
|---|---|---|
| Hot-Dip Galvanizing | 70–100µm Zn coating (ISO 1461) | Transmission towers |
| Shot Blasting | Sa2.5 cleanliness (ISO 8501) | Offshore platform legs |
Industrial Applications
1. Civil Engineering
- Bridge Girders: ST52-3 plates (thickness 20–80mm, CEV ≤0.45).
- Water Tanks: ST37-2 rolled sheets (yield ≥225 MPa).
2. Energy Infrastructure
| Component | Material Grade | Key Performance |
|---|---|---|
| Hydraulic Gates | ST52-3 | -10°C impact ≥35 J |
| Wind Tower Flanges | ST37-2 | Fatigue strength >200 MPa |
3. Transportation
- Crane Booms: ST52-3 forged sections (HB 160–200 hardness).
- Railcar Underframes: ST37-2 laser-cut profiles (thickness 6–30mm).
Quality Assurance
- Testing Protocols:
- Charpy V-notch tests at -20°C (EN 10045-1).
- Ultrasonic testing (EN 10160 Class B).
- Certifications:
- TÜV Rheinland weld certification.
- CE Mark (EN 10204-3.1).
Delivery & Storage
- Dimensions:
- Width: 1,500–3,000mm (max length: 18m).
- Thickness tolerance: ±0.3mm (cold-rolled), ±1.2% (hot-rolled).
- Packaging: VCI film + desiccant (24-month corrosion warranty).
Welding Advisory: Use E43XX electrodes with 50–100°C preheat for ST52-3*
Scope of Application
DIN 17100 steel plate is especially suitable for heavy-duty parts of welded structures, such as bridges, flood doors, storage tanks, water supply tanks, etc., and must be used in the environment and low temperature.
| China | USA | Germany | Japan | France | U.K. | internationality |
|
GB3077 |
AlSI |
DIN |
JIS |
NE |
BS |
ISO |
|
20Mn2 |
1320 1221 |
20Mn5 |
SMn21 |
20M5 |
150M19 |
– |
|
30Mn2 |
1330 |
30Mn5 |
SMn24 |
32M5 |
150M28 |
– |
|
35Mn2 |
1335 |
36Mn5 |
SMnl |
35M5 |
150M36 |
– |
|
40Mn2 |
1340 1341 |
– |
SMn2 |
40M5 |
– | – |
|
45Mn2 |
1345 |
46Mn7 |
SMn3 |
45M5 |
– | – |
|
50Mn2 |
1052 |
50Mn7 |
– |
55M5 |
– | – |
|
20MnV |
– |
20MnV6 |
– | – | – | |
|
30Mn2MoW |
– | — | – | – | – | |
|
27SiMn |
– |
27MnSi5 |
– | – | – | |
|
35SiMn |
– |
37MnSi5 |
– |
38MS5 |
– | – |
|
42SiMn |
– |
38MnSi4 46MnSi4 |
– |
38MS5 |
– | – |
|
20SiMn2MoV |
– | – | – | – | – | – |
|
25SiMn2MoV |
– | – | – | – | – | – |
|
37SiMn2MoV |
– | – | – | – | – | – |
|
40B |
14B35 |
35B2 |
– | – | – | – |
|
45B |
50B46H |
45B2 |
– | – | – | – |
|
50B |
14B50 |
– | – | – | – | – |
|
4OM∏B |
15B41 |
– | – | – | – | – |
|
45MnB |
15B48 50B44 |
– | – | – | – | – |
|
20Mn2B |
– | – | – | – | – | – |
|
20MnMoB |
80B20 |
– | – | – | – | – |
|
15MnVB |
– | – | – | – | – | – |
|
– |
– | – | – | – | – | – |
|
– |
– | – | – | – | – | – |
|
20MnVB |
– | – | – | – | – | – |
|
40MnVB |
– | – | – | – | – | – |
|
20MnTiB |
– | – | – | – | – | – |
|
25MnTiBRE |
– | – | – | – | – | – |
|
2OSiMnVB |
– | – | – | – | – | – |
|
15Cr |
5015 5115 |
15Cr3 |
SCr21 |
12C3 |
523A14 523M15 |
– |
|
15CrA |
– | – | – | – | – | – |
|
20Cr |
5120 |
20Cr4 |
SCr22 |
18C3 18C4 |
527A19 527M20 |
683/11 20Cr4 20CrS4 |
|
30Cr |
5130 |
28Cr4 |
SCr2 |
28C4 32C4 |
530A30 530A32 |
– |
|
35Cr |
5135 |
34Cr4 37Cr4 |
SCr3 |
38C4 |
530A36 |
683/8 3、 3a、 3b |
|
40Cr |
5140 |
38Cr4 41Cr4 |
SCr4 |
42C4 |
530A40 530M40 |
683/1 4、 4a^ 4b |
|
45Cr |
5145 |
42Cr4 |
SCR5 |
45C4 |
– | – |
|
50Cr |
5150 5152 |
– | – |
50C4 |
En48 |
– |
|
38CrSi |
– | – | – | – | – | – |
|
12CrMo |
4119 |
13CrMo44 |
– |
12CD4 15CD2 |
– | – |
|
15CrMo |
ASTM A-387Gr. B |
15CrMo5 16CrMo44 |
SCM21 |
15CD4. 05 |
BS1653 |
– |
|
20CrMo |
4118 |
20CrMo5 22CrMo4 |
SCM22 |
18CD4 20CD4 |
CDS 12 CDSllO |
– |
|
30CrMo |
4130 |
25CrMo4 |
SCM2 |
30CD4 |
CDS 13 |
– |
|
30CrMoA |
– |
32CrMol2 3ICRMo12 |
– | – | – | – |
|
35CrMo |
4135 4137 |
34CrMo4 35CrMo4 |
SCM3 |
35CD4 |
78A37 |
683/1 C35ea C35eb |
|
42CrMo |
4140 4142 |
41CrMo4 42CrMo4 |
SCM4 |
40CD4 42CD4 |
708M40 708A42 709M40 |
683/1 3 |
|
12CrMoV |
– | – | – | – | – | – |
|
35CrMoV |
– |
35CrMoV5 |
– | – | – | – |
|
12CrlMoV |
– |
13CrMoV4.2 |
– | – | – | – |
|
25Cr2MoVA |
– |
24CrMoV5.5 |
– | – | – | – |
|
25Cr2MolVA |
– | – | – | – | – | – |
|
20CR3MoWVA |
– |
21CrVMoW12 |
– | – | – | – |
|
38CrMoΛl |
6370 (ΛMS) |
34CrAlMo5 41CrAlMo7 |
SACM645 |
40CAD6.12 |
905M39 |
683/10 41CrAlMo74 |
|
20CrV |
6120 |
22CrV4 |
– |
22CrV4 |
– | – |
|
40CrV |
6140 |
42CrV |
– |
42CrV4 |
– | – |
|
50CrVA |
6150 |
50CrV4 |
SUPlO |
50CV4 |
735A50 |
– |
|
15CrMn |
– |
16MnCr5 |
– |
16MC5 |
– | – |
|
20CrMn |
5120 |
20MnCr5 |
SMC21 |
20MC5 |
– | – |
|
40CrMn |
5140 |
– |
SMC3 |
– | – | – |
|
20CrMnSi |
– | – | – | – | – | |
|
25CrMnSi |
– | – |
SMKl |
– | – | – |
|
30CrMnSi |
– | – | – | – | – | – |
|
30CrMnSiA |
– | – | – | – | – | – |
|
35CrMnSiA |
– | – |
SMK2 |
– | – | – |
|
20CrMnMo |
4119 |
20CrMo5 |
SCM23 |
– | – | – |
|
40CrMnMo |
4140 |
– | – | – | – | – |
|
20CrMnTi |
– | – |
SMK22 |
– | – | – |
|
30CrMnTi |
– |
30MnCrTi4 |
– | – | – | – |
|
20CrNi |
3120 |
20NiCr6 |
– |
20NC6 |
637A16 637M17 |
– |
|
40CrNi |
3140 |
46NiCr6 |
SNCl |
35NC6 |
640A35 640M40 |
– |
|
45CrNi |
3145 |
45NiCr6 |
– | – | – | – |
|
50CrNi |
3150 |
– | – | – | – | – |
|
12CrNi2 |
3115 |
14NiCrlO |
SNC21 |
IONCll 14NC11 |
– | – |
|
12CrNi3 |
3310 |
13NiCrl2 |
SNC22 |
10NC12 14NC12 |
655A12 655M13 |
– |
|
20CrNi3 |
– |
22NiCrl4 |
– |
20NC11 |
– | – |
|
30CrNi3 |
– |
28NiCrlO 31NiCrl4 |
SNC2 |
30NC11 30NC12 |
– | – |
|
37CrNi3 |
– |
35NiCrl8 |
SNC3 |
35NC15 |
– | – |
|
12Cr2Ni4 |
E3310 |
14NiCrl8 |
– |
12NC15 |
– | – |
|
20Cr2Ni4 |
E3316 |
22NiCrl4 |
– |
20NC14 |
659A15 659M15 |
– |
|
20CrNiMo |
8620 8720 |
20NiCrMo2 21NiCrMo2 |
– |
20NCD2 |
805A20 805M20 |
– |
|
40CrNiMoA |
4340 9840 |
36NiCrMo4 40NiCrMo6 |
SNCM8 |
35NCD5 40NCD3 |
817M40 816M40 |
– |
|
45CrNiMoVA |
4437 |
– |
SNCM9 |
– | – | – |
|
18Cr2Ni4WA |
||||||
|
25Cr2Ni4WA |
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