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ABS Grade A AH36 DH36 EH36 Shipbuilding Steel Hot Rolled Steel Sheet
ABS Grade A steel is a hot rolled ordinary tensile strength steel. ABS steel has 4 grades of ordinary strength steel for shipbuilding, and grade A is the lowest one. ABS Grade A steel has a yield strength of 34,100 psi (235 MPa) and an ultimate tensile strength of 58,000 - 75,500 psi (400-520 MPa). All ABS/A shipbuilding steels we offer are American Bureau of Shipping (ABS) certified.
Marine steel refers to the steel used to manufacture the hull structure of sea-going ships and inland ships, usually high-quality carbon steel and high-quality low-alloy steel. Marine steel is required to have certain strength, toughness and hardness, certain low temperature resistance and corrosion resistance, and requires good welding performance.
Commonly used shipbuilding structural steels include general-strength steel (A, B, D, E) steel plates specified in GB712, high-strength steel (AH32, DH32, EH32, AH36, DH36, EH36) steel plates; high-quality carbon steel for ships specified in GB5312 Plain steel (CIO, C20) steel pipe; A and B-grade steel bulb flat steel for shipbuilding specified in GB9945.
According to GB/T 13304 standard, spring steel is divided into non-alloy spring steel (carbon spring steel) and alloy spring steel according to its chemical composition.
Common Grades:
1. 65, 70, 85 steel grades
High strength, hardness and yield ratio can be obtained, but the hardenability is small, the heat resistance is not good, and the ability to withstand dynamic and fatigue loads is low. It is widely used, but it is mostly used for small springs with low working temperature or less Important larger spring. Such as springs for automobiles, tractors, railway vehicles and general machinery.
The composition of 65Mn is simple, and its hardenability, comprehensive mechanical properties, decarburization and other process properties are better than carbon steel, but it is more sensitive to overheating, has temper brittleness, and is prone to cracks during quenching. The price is low and the amount is large. It can manufacture various small-section flat springs, round springs, springs, etc., as well as valve springs, spring rings, shock absorbers, clutch reeds, brake springs, etc.
2. 55Si2Mn, 60Si2Mn, 60Si2MnA
High silicon content (Wsi) (up to 2.00% upper limit).
High strength and good elasticity. Good anti-tempering stability. Easy to decarburize and graphitize. Hardenability is not high.
The main spring steel type, has a wide range of uses. Manufacture of various springs, such as leaf springs, coil springs for automobiles, locomotives, and tractors, cylinder safety valve springs and some important springs that work under high stress, and springs that are severely worn.
55Si2MnB Due to the boron content, its hardenability is obviously improved. Front and rear suspension springs and auxiliary springs of light and medium-sized automobiles.
55Si2MnB The steel grade developed by China, its hardenability, comprehensive mechanical properties and fatigue properties are better than 60Si2Mn steel. It is mainly used for the manufacture of leaf springs for medium and small cars. .
3. 60Si2CrA 60Si2CrVA
High strength spring steel. High hardenability, good heat treatment process performance. Due to the high strength, the important large springs with large load should be handled in time to eliminate internal stress after coiling the spring. 60Si2CrA can be used to make steam turbine seal springs, regulating springs, condenser support springs, high-pressure water pump disc springs, etc. 60Si2CrVA steel also makes extremely important springs, such as springs for conventional weapons and springs, and springs for breakers.
4. 55CrMnA
The outstanding advantages of 60CrMnA are good hardenability, in addition to hot working properties, comprehensive mechanical properties, anti-decarburization properties, and various important springs with large cross-sections, such as large leaf springs and coil springs for automobiles and locomotives.
5. 60CrMnMoA
It has the highest hardenability among all existing spring steels. Good mechanical properties, anti-tempering stability, etc. Super-large springs used in large-scale civil construction, heavy-duty vehicles, machinery, etc. The thickness of the steel plate can reach more than 35mm, and the diameter of the round steel can exceed 60mm.
6. 50CrVA
A small amount of vanadium improves elasticity, strength, yield ratio and elastic reduction resistance, refines grains, and reduces the tendency of decarburization. The carbon content is small, and the plasticity and toughness are better than other spring steels. High hardenability and good fatigue performance All kinds of important coil springs are especially suitable for springs with high working stress amplitude and strict fatigue performance requirements, such as valve springs, fuel injector springs, cylinder expansion rings, safety valve springs, etc.
7. 60CrMnBA
The hardenability is higher than that of 60CrMnA, and other various properties are similar. Larger size leaf springs, coil springs, torsion springs, etc.
8. 30W4Cr2VA
High strength heat resistant spring steel. Hardenability is good. High temperature relaxation resistance and thermal processing performance are also very good. Heat-resistant springs with working temperature below 500~C, such as steam turbine main steam valve springs, steam seal spring sheets, boiler safety valve springs, 400t boiler disc valve springs, etc.
Mechanical Properties of Typical Chinese Spring Steel Grades
| Grade | Heat Treatment | Mechanical Properties (Not Less Than) | ||||||
| Quenching Temperature（℃） | Quenching Liquid | Tempering Temperature（℃） | σ0.2 | σb | δ5 | δ10 | Ψ | |
| （kgf/mm2） | （%） | （%） | （%） | |||||
| 65 | 840 | Oil | 500 | 80 | 100 | 9 | 35 | |
| 85 | 820 | Oil | 480 | 100 | 115 | 6 | 30 | |
| 65Mn | 830 | Oil | 540 | 80 | 100 | 8 | 30 | |
| 60Si2Mn | 870 | Oil | 480 | 120 | 130 | 5 | 25 | |
| 60Si2CrVA | 850 | Oil | 410 | 170 | 190 | 6 | 20 | |
| 50CrMn | 840 | Oil | 490 | 110 | 130 | 5 | 35 | |
| 55SiMnVB | 860 | Oil | 460 | 125 | 140 | 5 | 30 | |
| 50CrVA | 850 | Oil | 500 | 115 | 130 | 10 | 40 | |
| 30W4Cr2VA | 1050～1100 | Oil | 600 | 135 | 150 | 7 | 40 | |
| Grade | Heat Treatment | Mechanical Properties (Not Less Than) | ||||||
| Quenching Temperature（℃） | Quenching Liquid | Tempering Temperature（℃） | σ0.3 | σb | δ6 | δ11 | Ψ | |
| （kgf/mm3） | （%） | （%） | （%） | |||||
| 105 | 860 | Oil | 521.3888889 | 143.75 | 158.75 | 2.732919255 | 36.66666667 | |
| 125 | 863.3333333 | Oil | 526.5555556 | 149.5 | 164.1666667 | 2.149068323 | 37.66666667 | |
| 66Mn | 866.6666667 | Oil | 531.7222222 | 155.25 | 169.5833333 | 1.565217391 | 38.66666667 | |
| 60Si3Mn | 870 | Oil | 536.8888889 | 161 | 175 | 0.98136646 | 39.66666667 | |
| 60Si3CrVA | 873.3333333 | Oil | 542.0555556 | 166.75 | 180.4166667 | 9 | 40.66666667 | |
| 51CrMn | 876.6666667 | Oil | 547.2222222 | 172.5 | 185.8333333 | -0.186335404 | 41.66666667 | |
| 56SiMnVB | 880 | Oil | 552.3888889 | 178.25 | 191.25 | -0.770186335 | 42.66666667 | |
| 51CrVA | 883.3333333 | Oil | 557.5555556 | 184 | 196.6666667 | 10.5 | 43.66666667 | |
| 30W4Cr3VA | 1050～1101 | Oil | 562.7222222 | 189.75 | 202.0833333 | 11 | 44.66666667 | |
Products Description
| Product Name | Carbon Steel Sheet |
| Material | Q195、Q215、Q235、Q255、Q275，A36, SS400, Q235B,Q345B，Q345C，Q345D，Q345E，Q390，Q390B，Q390C，Q390D，Q390E，Q420，Q420B，Q420C，Q420D,Q420E,Q460,Q460D,Q500C,Q500D,Q500E,Q550C,Q550D,Q550E,Q620C,Q620D,Q620E,Q690A,Q690B,Q690C,Q690D,Q690E,Q690D,Q690C,Q890C,Q890D,16Mo3,16MnL,16MnR,16Mng,16MnDR etc |
| Standard | GB,AISI,ASTM,JIS,DIN,API |
| Thickness | 0.1-100mm or as your request |
| Width | 1000, 1219, 1500, 1800, 2000mm or as your request |
| Length | 2000mm,2440mm(8feet),2500mm,3000mm,3048mm(10feet),5800mm, 6000mm or as your requirements |
| Treatment/Technique | Hot rolled, cold rolled |
| Surface | Pickled,Black,Polishing,Checkered,Embossed etc |
| Applications | Used for bridge and construction riveting, bolted and welded structure, as well as general purpose structural steel quality ofcarbon steel, steel plate and bar steel etc |
| Trade Terms | EXW, FOB, CFR, CIF |
| Delivery time | Shipped in 7-15 days after payment |
| Package | Standard sea-worthy package or as required |
| SEAWORTHY PACKING | 20ft GP: 5.8m(length) x 2.13m(width) x 2.18m(high) about 24-26CBM |
| 40ft GP: 11.8m(length) x 2.13m(width) x 2.18m(high) about 54CBM | |
| 40ft HG: 11.8m(length) x 2.13m(width) x 2.72m(high) about 68CBM |
Q1. Where is your factory ?
A1: Our company’s processing center is located in Shandong, China.
Which is well equipped with kinds of machines, such as laser cutting machine,mirror polishing machine and so on.
We can provide a wide range of personalized services according to the customers’ needs.
Q2. What are your company's main products ?
A2: Our main products are carbon steel plate/sheet, coil, round/square pipe, bar, channel, etc.
Q3. How do you control quality ?
A3: Mill Test Certification is supplied with shipment, Third Party Inspection is available.
Q4. What are the advantages of your company ?
A4: We have many professionals, technical personnel, more competitive prices and best after-sales service than other stainless steel companies.
Q5. How many coutries you already exported ?
A5: Exported to more than 50 countries mainly from America, Russia, UK, Kuwait, Egypt, Turkey, Jordan, India, etc.
Q6. Can you provide sample ?
A6: Small samples in store and can provide the samples for free.
Customized samples will take about 5-7days
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