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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