A283/Q195 Carbon Steel Plate: Technical Specifications & Industrial Applications
Material Classification & Standards
ASTM A283/Q195 is a general-purpose structural carbon steel plate with low-to-medium tensile strength, optimized for cost-effective fabrication and moderate load-bearing capacity. Key classifications:
- ASTM A283: Grades A (lowest strength) to D (highest strength)
- GB/T 700 Q195: Chinese equivalent with yield strength ≥195 MPa
Global Equivalents
| Region | Standard | Equivalent Grade |
|---|---|---|
| USA | ASTM A283 | Grade C/D |
| EU | EN 10025-2 | S235JR |
| Japan | JIS G3101 | SS400 |
Key Technical Parameters
1. Chemical Composition (ASTM A283)
| Element (%) | Grade A | Grade B | Grade C | Grade D |
|---|---|---|---|---|
| C ≤ | 0.14 | 0.17 | 0.24 | 0.27 |
| Mn ≤ | 0.90 | 0.90 | 0.90 | 0.90 |
| P ≤ | 0.035 | 0.035 | 0.035 | 0.035 |
| S ≤ | 0.04 | 0.04 | 0.04 | 0.04 |
| Si* | 0.15–0.40 | 0.15–0.40 | 0.15–0.40 | 0.15–0.40 |
*Si content varies by thickness: ≤0.40% for plates >25.4mm, 0.15–0.40% for ≤25.4mm
2. Mechanical Properties
| Grade | Tensile Strength | Yield Strength (min) | Elongation (%) |
|---|---|---|---|
| A | 310–415 MPa | 165 MPa | 27 (8″) / 30 (2″) |
| B | 345–450 MPa | 185 MPa | 25 (8″) / 28 (2″) |
| C | 380–515 MPa | 205 MPa | 22 (8″) / 25 (2″) |
| D | 415–550 MPa | 230 MPa | 20 (8″) / 23 (2″) |
Physical Properties:
- Density: 7.80 g/cm³ (0.284 lb/in³)
- Thermal Conductivity: 50–55 W/m·K
Production & Processing
1. Manufacturing Methods
- Hot Rolling: Primary method for thickness >3mm (轧制温度: 950–1100℃)
- Cold Rolling: Precision processing for thickness 0.1–3mm (公差: ±0.05mm)
2. Surface Treatments
| Type | Technical Requirements | Application Scope |
|---|---|---|
| Pickling & Oiling | ISO 15730 Class B cleanliness | Pre-paint preparation |
| Hot-Dip Galvanizing | Zn coating 610 g/m² (ASTM A123) | Outdoor structures |
Industrial Applications
1. Structural Fabrication
- Building Construction: Roofing sheets (Grade A, 1–3mm thickness)
- Storage Tanks: Q195 plates (6–20mm) for agricultural silos
2. Transportation Equipment
| Component | Material Specification | Performance Criteria |
|---|---|---|
| Truck Trailers | ASTM A283 Grade C, 4–8mm | Fatigue strength ≥200 MPa |
| Railway Cargo Beds | Q195 cold-rolled sheets | Formability (r-value ≥1.2) |
3. Machinery Components
- Agricultural Implements: Plow blades (Grade D, HB 130–170 hardness)
- Conveyor Systems: Roller shells (Q195, thickness 2–5mm)
Quality Control & Certification
- Mandatory Testing:
- Bend test (180° around 1t mandrel per ASTM A370)
- Ultrasonic inspection (EN 10160 Class S1 for thickness >10mm)
- Certifications:
- CE Marking (EN 10204-3.1)
- ISO 9001:2015 (batch traceability)
Delivery Specifications
- Dimensions:
- Width: 1,000–3,000mm (customizable up to 12m length)
- Thickness tolerance: ±0.1mm (cold-rolled), ±0.5mm (hot-rolled)
- Packaging: VCI-coated + steel strapping (rust prevention ≥18 months)
Welding Note: Use E6013 electrodes with preheat ≥50℃ for Grade D plates (CE ≤0.35)*
CE (Carbon Equivalent) = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15
Scope of Application
ASTM A283 steel plate is a kind of low carbon steel with high strength and good formability. It is easy to process and manufacture, and can be safely welded by various welding methods. ASTM A283 steel plate is a structural carbon steel plate used for low or medium tensile strength applications. ASTM A283 steel plate is used in the manufacture of riveted, bolted and welded structures for storage tanks and cryogenic control vessels, bridges and buildings, including prefabricated buildings, warehouses and industrial commercial structures.
| 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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