S690Q and St37-2 are vastly different structural steels:
St37-2 is a basic, low-strength, general-purpose carbon steel (like Q235B or S235JR), while S690Q is a high-performance, high-strength, quenched & tempered (Q&T) fine-grain steel with significantly higher yield strength (min. 690 MPa vs. ~235 MPa for St37-2) and excellent toughness, used for demanding, lightweight structures, making S690Q a premium material for heavy-duty engineering where St37-2 would be inadequate.
Chemical composition
- EN10025-6 S690Q high strength steel plate Chemical composition:
| Grade | C % | Si % | Mn % | P % | S % | N % | B % | Cr % |
| S690Q | 0.200 | 0.800 | 1.700 | 0.025 | 0.015 | 0.015 | 0.005 | 1.500 |
| Cu % | Mo % | Nb % | Ni % | Ti % | V % | Zr % | ||
| 0.500 | 0.700 | 0.060 | 2.000 | 0.050 | 0.120 | 0.150 |
- Chemical composition for St37-2 steel plate (Product Analysis Max%)
| Main chemical elements composition of St37-2 steel plate | ||||||
| Thickness(mm) | C | Si | Mn | P | S | N |
| T≤16 | 0.21 | 0.60 | 1.70 | 0.065 | 0.065 | 0.010 |
| T>16 | 0.25 | |||||
mechanical properties
- EN10025-6 S690Q high tensile steel sheet mechanical properties:
| Grade | Thickness | Min Yield | Tensile | Elongation | Min Impact Energy | |
| S690Q | 8mm-50mm | Min 690Mpa | 770-940Mpa | 14% | -20 | Min 30J |
| 51mm-100mm | Min 650Mpa | 760-930Mpa | 14% | -20 | Min 30J | |
| 101mm-150mm | Min 630Mpa | 710-900Mpa | 14% | -20 | Min 30J |
- Mechnical property for St37-2 steel plate:
| Thickness (mm) | |||||
| St37-2 | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 |
| Yield strength (≥Mpa) | 235 | 225 | 215 | 205 | 195 |
| < 3 | ≥ 3 ≤ 100 | > 100 | |||
| Tensile strength (Mpa) | 360-510 | 340-470 | 340-470 | ||
Equivalent Grade
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EN 10025-2 S690Q Sheet and Plates EQUIVALENT GRADE
| Standard | ASTM | DIN, WNr | JIS | AFNOR | ISO 4952 |
| EN 10025-2:2004 | A709-100 | TStE690V DILLIMAX 690 NAXTRA 70 | JFE HITEN 780LE | E690T E690TFP S690T | E690 |
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Worldwide equivalents of grade St37-2
Characteristics
Performance characteristics of S690Q high strength steel
High toughness: S690Q high tensile steel can still maintain good performance under low temperature or impact load, effectively absorb energy and reduce the risk of brittle fracture.
Good welding performance: S690Q high strength low alloy steel can match a variety of welding methods, and the welded joint has high strength and good toughness.
Excellent fatigue resistance: S690Q low alloy steel material can withstand repeated stress cycles and reduce the occurrence of fatigue cracks.
Corrosion resistance: After special anti-corrosion treatment, S690Q low alloy steel has good corrosion resistance.
- Advantages of St37-2 steel
Cost-Effective: Cheaper than alloy or high-strength steels.
Versatility: Suitable for diverse fabrication techniques.
Availability: Widely available in plates, sheets, bars, and profiles.
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What is ST37-2 material?
low carbon steel
ST37. 2 is low carbon steel with a carbon content of up to 0.20% and is widely applied for manufacturing structural applications and components.
What is DIN ST37-2 equivalent to?
DIN 17100 St 37-2 steel equivalent grade: St 37-2 steel plate/sheet is in DIN 17100 standard, the material number is 1.0037. The equivalent grade of St 37-2 steel are EN 10025 EN 10025, NFA 35-501 E 24-2, UNI 7070 Fe 360 B, BS 4360 40 A, ASTM A 283 C – A 570 Gr. 33.
What is the difference between ST37-2 and s235?
Summary: ST37-2 and S235JR are very similar in terms of composition and mechanical properties, with both being low-carbon structural steels. S235JR is the modern equivalent under the European EN 10025-2 standard and is generally preferred for new construction projects in Europe.
What is the difference between ST52 3 and ST37-2?
For steel thickness ≤16 mm, ST37-2 has a minimum yield strength of 235 N/mm² and tensile strength ~360–510 N/mm². In contrast, ST52-3 has a minimum yield of 355 N/mm² and tensile 510–680 N/mm². In other words, ST52's yield is roughly 50% higher than ST37's for similar thicknesses.
What is the difference between S690Q and S690QL?
S690Q: Minimum impact toughness tested at -20°C (30J average). → Typical Use: Cranes in temperate climates, quarry equipment. S690QL: Certified for -40°C and below (≥40J impact toughness). → Critical Use: Arctic pipelines, offshore platforms, mining vehicles in Siberia.
What grade is S690QL material?
S690QL is a high strength quenched and tempered steel grade that complies to steel specification EN 10025. The designation S690QL refers to a minimum yield strength of 690 MPa.
What is S690 grade steel?
S690 high yield & fine grain steel plate is a high strength, quenched and tempered fine-grain structural steel. Structural steel S690 is used in structures that must withstand very heavy loads. This grade is meant for structures where weight savings is important.
What is the equivalent of S690 steel?
Approximate equivalents
ASTM A514, EN 10149-2 Grade S700MC, AS/NZS 3579 Grade 700, AM 700, Bisalloy 80.
What is the price of S690QL material?
S690QL High Strength Steel Plates, Thickness: 5mm to 150mm at 5,600-13,500 CNY per tonne (approx. 5.6-13.5 CNY per kilogram)/440-900 USD per tonne (approx. 0.44-0.90 USD per kilogram)
What is the hardness of S690 QL steel?
S690QL steel stockholders and suppliers. S690QL is a quenched and tempered high strength steel supplied in full plates or cut pieces with delivery to the whole of the UK. With its high yield of minimum 690MPa it offers better strength than standard carbon steel grades.
What is the effective use of high strength S690 steel in construction?
The high strength S690 steels have an excellent strength-to-self-weight ratio, and they are highly efficient to be used in heavily loaded structures. Typical applications include piles and columns in buildings and supporting members in bridges.
