ASTM A570 Steel Tube,Pipe, grade D

ASTM A570 Steel Tube, grade D, sheet and strip Product Information -:- For detailed product information, please contact sales. -: ASTM A570 Steel Tube, grade D, sheet and strip Synonyms -:- For detailed product information, please contact sales. -:

ASTM A570 Steel, grade D, sheet and strip Product Information -:- For detailed product information, please contact sales. -: ## **Product Datasheet: ASTM A570 Grade D Steel Sheet and Strip** **Product Overview** ASTM A570 Grade D is a **higher-strength carbon steel sheet and strip** designated for structural applications requiring a guaranteed **minimum yield strength of 60 ksi (415 MPa)**. As the highest standard strength grade within the ASTM A570 specification, Grade D provides a significant increase in load-bearing capacity over Grades B and C, enabling the design of lighter or stronger components. This grade is specified primarily by its mechanical properties, making it a cost-effective solution for applications where high strength is needed but the enhanced properties of microalloyed (HSLA) steels are not required. It is typically supplied in the **hot-rolled** condition. **Key International Standards** * **Primary Standard:** **ASTM A570 / A570M** - Standard Specification for Steel, Sheet and Strip, Carbon, Structural, Hot-Rolled. * **Governing Specification:** This product conforms to the requirements for **Grade D** as defined in ASTM A570. * **Quality Designation:** **Structural Quality (SQ)**. It is suitable for parts subjected to significant structural loads where welding and moderate forming are the primary fabrication methods. * **Material Condition:** Typically supplied in the **hot-rolled** condition. It may be available as **HRPO (Hot Rolled, Pickled and Oiled)** to provide a scale-free surface for improved paint adhesion and further processing. * **Comparable Standards:** In terms of strength, it is comparable to some **High-Strength Low-Alloy (HSLA)** grades like **ASTM A1011 HSLAS Grade 60**, but achieves its strength primarily through higher carbon and manganese content rather than microalloying elements like niobium or vanadium. **Chemical Composition (Weight % - Typical Ranges, Not Mandated)** *ASTM A570 is a mechanical property specification; chemistry is controlled by the producer to meet the tensile and yield requirements.* | Element | Typical Range for Grade D (Producer's Aim) | Note | | :--- | :--- | :--- | | **Carbon (C)** | 0.15 - 0.25% | Higher carbon is the primary driver for the increased strength. | | **Manganese (Mn)** | 0.80 - 1.20% | Elevated to enhance hardenability and strength. | | **Phosphorus (P)** | ≤ 0.035% | Standard limit. | | **Sulfur (S)** | ≤ 0.035% | Standard limit. | | **Silicon (Si)** | ≤ 0.30% | -- | | **Carbon Equivalent (C.E. IIW)** | Typically 0.40 - 0.50 | Weldability requires careful control due to the higher carbon and manganese content. | **Physical & Mechanical Properties (Guaranteed Minimums)** | Property | Requirement (ASTM A570 Grade D) | Typical Performance / Notes | | :--- | :--- | :--- | | **Yield Strength (Min)** | 60 ksi (415 MPa) | Typically 60 - 70 ksi (415 - 483 MPa) | | **Tensile Strength** | 65 ksi (450 MPa) min | Typically 70 - 80 ksi (483 - 552 MPa) | | **Elongation in 2" (Min)** | 18% (for thickness ≤ 0.229") | Ductility is lower than Grades B and C, reflecting the higher strength. | | **Modulus of Elasticity** | ~29,000 ksi (200 GPa) | Standard for carbon steel. | | **Hardness (Approx., HRB)** | -- | Typically 85-95 HRB. | | **Key Feature** | **Economical High-Strength Carbon Steel:** Provides a guaranteed 60 ksi minimum yield point at a lower cost than most microalloyed HSLA grades, offering a straightforward, high-strength material for structural fabrication. | **Product Applications** ASTM A570 Grade D sheet and strip are used in structural applications where higher strength is critical to meet design loads or reduce material thickness. * **Heavy Equipment & Machinery:** Structural frames, booms, arms, and high-stress brackets for construction, mining, and agricultural machinery. * **Transportation:** Chassis components, trailer frames, dump truck bodies, and structural members for buses and heavy-duty vehicles. * **Building & Infrastructure:** Heavier structural members, support columns, and base plates where higher loads are anticipated. * **Material Handling:** High-capacity storage rack uprights and beams, forklift masts, and conveyor supports. * **Security & Defense:** Components for barriers, shelters, and other structures requiring high strength. **Advantages & Fabrication Notes** * **Controlled Weldability Required:** Due to its higher carbon equivalent, welding Grade D requires strict adherence to proper procedures to avoid hydrogen-induced cracking and brittle Heat-Affected Zones (HAZ). * **Preheat:** **Mandatory** for most thicknesses. Typical range is **250-400°F (121-204°C)** depending on thickness and restraint. * **Low-Hydrogen Practice:** Essential. Use of E70XX or E80XX low-hydrogen electrodes is required. * **Post-Weld Heat Treatment (PWHT):** May be recommended or required for thick sections or highly restrained joints to relieve stresses and temper the HAZ. * **Limited Formability:** Suitable for **simple bending and straight-line forming** but not recommended for severe forming, deep drawing, or complex stamping operations. The higher strength and lower ductility increase the risk of cracking during forming. * **Cost vs. HSLA:** Often less expensive than HSLA grades of similar strength (e.g., A1011 HSLAS 60) but may incur higher fabrication costs due to more stringent welding requirements and lower formability. * **Surface Condition:** Mill scale is standard. **HRPO (Pickled and Oiled)** is highly recommended for critical painted applications or before galvanizing to ensure surface quality. * **No Guaranteed Toughness:** **Impact toughness (Charpy testing) is not a standard requirement.** For applications involving dynamic loading, impact, or low-temperature service, an HSLA grade with guaranteed toughness should be specified instead. **Disclaimer:** This datasheet provides general information on **ASTM A570 Grade D** hot-rolled sheet and strip. This material is a **high-strength, property-based carbon steel**. For procurement, specify the **standard (A570), grade (D), dimensions, condition (e.g., HR, HRPO)**, and any special requirements. **Important Considerations:** 1. **Welding Expertise:** Fabrication shops must be qualified and experienced in welding higher-carbon steels. 2. **Application Suitability:** Not recommended for fracture-critical, fatigue-critical, or low-temperature applications without thorough engineering analysis and possibly supplemental testing. 3. **Alternative Grades:** For applications requiring better weldability, formability, or guaranteed toughness at a similar strength level, consider specifying **ASTM A1011 HSLAS Grade 60** or **ASTM A606 Type 4** (weathering HSLA). 4. **Consultation:** Always consult with the material supplier and a qualified welding engineer to develop appropriate fabrication procedures for this grade. -:- For detailed product information, please contact sales. -: ASTM A570 Steel, grade D, sheet and strip Specification Dimensions Size： Diameter 20-1000 mm Length <4714 mm Size:We can customized as required Standard： Per your request or drawing We can customized as required Properties（Theoretical） Chemical Composition -:- For detailed product information, please contact sales. -: ASTM A570 Steel, grade D, sheet and strip Properties -:- For detailed product information, please contact sales. -:

Applications of ASTM A570 Steel Tube, grade D, sheet and strip -:- For detailed product information, please contact sales. -: Chemical Identifiers ASTM A570 Steel Tube, grade D, sheet and strip -:- For detailed product information, please contact sales. -:

Packing of ASTM A570 Steel Tube, grade D, sheet and strip -:- For detailed product information, please contact sales. -: Standard Packing: -:- For detailed product information, please contact sales. -: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and Steel Tube drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1185 gallon liquid totes Special package is available on request. E FORUs’ is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition