S355J2钢号技术规范 - 中英文对照文档
S355J2钢号技术规范
中英文对照技术文档 | Bilingual Technical Documentation
版本: 2023.09
标准依据: EN 10025-2:2004
等效牌号: Q355D (GB/T 1591)
基础属性 | Basic Properties
钢号本体
S355J2 (欧盟标准结构钢牌号)
S355J2 (European standard structural steel designation)
钢种类型
低合金高强度结构钢
High-strength low-alloy structural steel
含少量合金元素提升强度
Contains small amounts of alloying elements to enhance strength
核心基体
碳素结构钢
Carbon structural steel
以铁碳为基础，添加微量合金
Iron-carbon based with trace alloy additions
交货状态
常见: 热轧、正火
Common: Hot-rolled, Normalized
部分需按需定制
Customizable as required
材质等级
J2为冲击韧性等级
J2 indicates impact toughness grade
区别于S355J0、S355J1
Different from S355J0, S355J1
性能特征 | Performance Characteristics
屈服强度
核心力学性能: ≥355MPa
Core mechanical property: ≥355MPa
对应钢号中"355"的含义
Meaning of "355" in steel designation
抗拉强度
典型范围: 470-630MPa
Typical range: 470-630MPa
结构承载关键指标
Key indicator for structural load-bearing
冲击韧性
J2等级要求: -20℃低温冲击功≥27J
J2 grade requirement: ≥27J at -20°C
抗低温脆性
Resistance to low-temperature brittleness
伸长率
≥21%，衡量材料塑性变形能力
≥21%, measures material plastic deformation capacity
低温韧性
-20℃工况下的抗断裂能力
Fracture resistance at -20°C operating conditions
J2等级核心优势
Core advantage of J2 grade
焊接性能
良好可焊性，无需预热或低预热
Good weldability, no or low preheating required
适合结构焊接
Suitable for structural welding
标准规范 | Standards & Specifications
欧盟核心标准
EN10025-2
EN10025-2
S355J2的归属标准
Governing standard for S355J2
"结构钢热轧产品第2部分:非合金及细晶粒结构钢"
"Hot rolled products of structural steels - Part 2: Technical delivery conditions for non-alloy structural steels"
中国对应标准
GB/T1591
GB/T1591
等效牌号为Q355D
Equivalent grade: Q355D
可参考比对
For reference and comparison
美国近似标准
ASTM A572
ASTM A572
对应Grade50
Corresponds to Grade50
性能指标接近
Similar performance indicators
化学成分
关键元素: C≤0.20%, Si≤0.55%, Mn≤1.60%
Key elements: C≤0.20%, Si≤0.55%, Mn≤1.60%
P≤0.035%, S≤0.035%
P≤0.035%, S≤0.035%
部分含Nb/V/Ti微合金
May contain Nb/V/Ti micro-alloying
执行标准
明确钢号生产、检验需符合的具体规范
Specifies production and inspection requirements
如EN10025-2的尺寸、公差要求
Including EN10025-2 dimensional and tolerance requirements
应用场景 | Application Scenarios
建筑结构
厂房、桥梁、高层建筑的承重构件
Load-bearing components for factories, bridges, high-rise buildings
如钢梁、钢柱
e.g., steel beams, columns
工程机械
挖掘机、起重机的车架、臂架等受力部件
Load-bearing parts for excavators, cranes (frames, booms)
压力容器
低压力等级的储罐、容器壳体
Low-pressure storage tanks, vessel shells
需满足韧性要求
Requires toughness compliance
船舶与海洋工程
近海结构、船舶甲板及框架构件
Offshore structures, ship decks and frame components
抗低温环境
Resistance to low-temperature environments
钢结构件
通用结构件，如支架、平台、管道支架等
General structural components (brackets, platforms, pipe supports)
加工与检验 | Processing & Inspection
热加工
热轧、锻造，适合成型大型结构件
Hot rolling, forging - suitable for forming large structural parts
冷加工
冲压、折弯，需控制变形量以防开裂
Stamping, bending - control deformation to prevent cracking
焊接工艺
电弧焊、埋弧焊等
Arc welding, submerged arc welding
匹配低氢型焊条以保障韧性
Use low-hydrogen electrodes to ensure toughness
无损检测
UT超声检测、MT磁粉检测
UT (Ultrasonic Testing), MT (Magnetic Particle Testing)
排查内部/表面缺陷
Detect internal/surface defects
力学性能检验
拉伸试验、冲击试验、弯曲试验
Tensile testing, impact testing, bend testing
验证性能是否达标
Verify compliance with specifications
表面处理
除锈、涂漆，提升耐腐蚀性
Rust removal, painting - enhance corrosion resistance
延长使用寿命
Extend service life
核心关键词 | Core Keywords
S355J2
EN10025-2
低合金高强度钢
High-strength low-alloy steel
Q355D
屈服强度
Yield Strength
冲击韧性
Impact Toughness
结构钢
Structural Steel
延伸阅读
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