Q355鋼是我國(guó)常用的低合金高強(qiáng)度結(jié)構(gòu)鋼，取代了Q345。該材料的最小屈服強(qiáng)度為355 MPa（51 ksi），抗拉強(qiáng)度為470-630 MPa（68-91 ksi）。根據(jù)GB/T 1591-2018，Q355有3個(gè)鋼種：Q355AR,Q355M和Q355N，這些鋼種由后綴字母B、C、D、E、F表示質(zhì)量等級(jí)。
Q355:Q355B,Q355C和Q355D。
q355 m:q355 mb,q355 mc,q355 md,q355 me,q355 mf
Q355N：Q355NB,Q355NC,q355 nd,q355 ne,q355 nf
含義（名稱(chēng)）
“Q”是漢語(yǔ)拼音的縮寫(xiě)：“屈服”，意思是屈服強(qiáng)度；
“355”表示鋼直徑或厚度≤16mm的最小屈服強(qiáng)度355 MPa；
“AR”是指軋制，當(dāng)交貨條件為熱軋時(shí)，可以省略/刪除該符號(hào)；
“M”指熱機(jī)械軋制；
“N”表示正火或正火軋制；
B、 C、D、E和F表示質(zhì)量等級(jí)。
注：AR、M、N為交貨條件。
Q355 Steel Properties
The tables below show Q355 material properties, datasheet and specifications such as chemical composition, and physical and mechanical properties.
Chemical Composition (Hot rolled)
Hot rolled steel chemical composition based on heat analysis.
Q355鋼性能
下表顯示了Q355材料性能、數(shù)據(jù)表和規(guī)格，如化學(xué)成分、物理和機(jī)械性能。
化學(xué)成分（熱軋）
基于熱分析的熱軋鋼化學(xué)成分。
Chemical Composition (Heat Analysis), %, ≤ |
Steel Grade | Quality Grade | C | Si | Mn | P | S | Cr | Ni | Cu | N |
Q355 | Q355B | 0.24 | 0.55 | 1.6 | 0.035 | 0.035 | 0.30 | 0.30 | 0.40 | 0.012 |
Q355C | 0.20 | 0.030 | 0.030 | 0.012 |
Q355D | 0.20 | 0.025 | 0.025 | – |
Note: For quality grades C & D, Carbon content (C)-
C ≤0.20% when thickness/diameter ≤40mm (1.57 in.);
C ≤0.22 when thickness/dia. >40mm (1.57 in.);
Normalized or normalized rolled steel
注：對(duì)于質(zhì)量等級(jí)C和D，碳含量（C）-
·當(dāng)厚度/直徑≤40mm（1.57英寸）時(shí)，C≤0.20%；
·當(dāng)厚度/直徑>40毫米（1.57英寸）；
正火或正火軋制鋼
Chemical Composition (Heat Analysis), % 化學(xué)成分（熱分析），% |
Steel Grade | Quality Grade | C, ≤ | Si, ≤ | Mn | P, ≤ | S, ≤ | Cr, ≤ | Ni, ≤ | Cu, ≤ | Mo, ≤ | N, ≤ | Nb | V | Ti | Al, ≥ |
Q355N | Q355NB | 0.20 | 0.5 | 0.90-1.65 | 0.035 | 0.035 | 0.30 | 0.50 | 0.40 | 0.10 | 0.015 | 0.005-0.05 | 0.01-0.12 | 0.006-0.05 | 0.015 |
Q355NC | 0.20 | 0.030 | 0.030 |
Q355ND | 0.20 | 0.030 | 0.025 |
Q355NE | 0.18 | 0.025 | 0.020 |
Q355NF | 0.16 | 0.020 | 0.010 |
Thermomechanically rolled steel
熱機(jī)械軋制鋼
Chemical Composition (Heat Analysis), % |
Steel Grade | Quality Grade | C, ≤ | Si, ≤ | Mn, ≤ | P, ≤ | S, ≤ | Cr, ≤ | Ni, ≤ | Cu, ≤ | Mo, ≤ | N, ≤ | Nb | V | Ti | Al, ≥ |
Q355M | Q355MB | 0.14 | 0.5 | 1.60 | 0.035 | 0.035 | 0.30 | 0.50 | 0.40 | 0.10 | 0.015 | 0.01-0.05 | 0.01-0.10 | 0.006-0.05 | 0.015 |
Q355MC | 0.030 | 0.030 |
Q355MD | 0.030 | 0.025 |
Q355ME | 0.025 | 0.020 |
Q355MF | 0.020 | 0.010 |
Notes:
For bars and sections, the P and S content can be 0.005% higher.
For Ti content, can be up to 0.20%.
Carbon Equivalent (CEV)
筆記：
·對(duì)于棒材和型材，P和S含量可以高出0.005%。
·對(duì)于Ti含量，可以高達(dá)0.20%。
碳當(dāng)量（CEV）
Based on smelting analysis, steel delivered in hot rolled state.
|
| CEV (Mass fraction ≤%); Nominal thickness or diameter (d) |
Steel Grade | Quality Grade | ≤ 30 | 30 < d ≤ 63 | 63 < d ≤ 150 | 150 < d ≤ 250 | 250 < d ≤ 400 |
Q355 | Q355B | 0.45 (CEV) | 0.47 | 0.47 | 0.49 | – |
Q355C | – |
Q355D | 0.49 |
Q355 Material Mechanical Properties
Notes:
1 MPa = 1 N/mm2
1 GPa = 1 kN/mm2
Q355 steel mechanical properties are listed in the data sheet below, including yield strength, tensile strength and elongation, etc.
Yield Strength
Q355材料力學(xué)性能
·1 MPa=1 N/mm2
·1 GPa=1 kN/mm2
Q355鋼的力學(xué)性能如下表所示，包括屈服強(qiáng)度、抗拉強(qiáng)度和伸長(zhǎng)率等。
屈服強(qiáng)度
Yield Strength (≥ MPa), Thickness or Dia. (d) mm |
Steel Grade | Quality Grade | d≤16 | 16< d ≤40 | 40 < d ≤63 | 63 < d ≤ 80 | 80< d ≤ 100 | 100< d≤ 150 | 150 < d≤ 200 | 200 < d ≤ 250 | 250 < d ≤ 400 |
Q355 | Q355B | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 | – |
Q355C | – |
Q355D | 265 |
Q355N | All | – |
Yield Strength (≥ MPa), Thickness or Dia. (d) mm |
Steel Grade | Quality Grade | d≤16 | 16< d ≤40 | 40 < d ≤63 | 63 < d ≤ 80 | 80< d ≤ 100 | 100< d≤ 120 |
Q355M | All | 355 | 345 | 335 | 325 | 325 | 320 |
Tensile Strength抗拉強(qiáng)度
Tensile Strength, MPa; Dia. (d) mm |
Steel Grade | Quality Grade | d≤100 | 100< d ≤250 | 250< d ≤400 |
Q355 | Q355B | 470-630 | 450-600 | – |
Q355C | – |
Q355D | 450-600 |
Q355N | All | – |
Tensile Strength, MPa; Dia. (d) mm |
Steel Grade | Quality Grade | d≤40 | 40< d ≤63 | 63< d ≤100 | 100< d ≤120 |
Q355M | All | 470-630 | 450-610 | 440-600 | 430-590 |
Elongation
Elongation (%); Dia. (d) mm; (Hot rolled) |
Sample direction | d≤40 | 40< d ≤63 | 63< d ≤100 | 100< d ≤150 | 150< d≤ 200 | 250< d ≤400 |
Transverse | 20 | 19 | 18 | 18 | 17 | 17 |
Vertical | 22 | 21 | 20 | 18 | 17 | 17 |
Charpy Impact沖擊
Charpy (V-notch) impact test temperature and impact absorption energy (KV2/J).
夏比（V型缺口）沖擊試驗(yàn)溫度和沖擊吸收能量（KV2/J）。
Quality Grade | Temperature, °C (°F) | Longitudinal Impact Energy (J), ≥ | Transverse Impact Energy (J), ≥ |
Q355B,
Q355MB,
Q355NB | 20 (68) | 34 | 27 |
Q355C,
Q355MC,
Q355NC | 0 (32) | 34 | 27 |
Q355D | -20 (-4) | 34 (Only for thickness ≥250mm) | 27 (for thickness ≥250mm) |
Q355ND,
Q355MD | 20 (68) | 55 | 31 |
0 (32) | 47 | 27 |
-20 (-4) | 40 | 20 |
Q355NE,
Q355ME | 20 (68) | 63 | 40 |
0 (32) | 55 | 34 |
-20 (-4) | 47 | 27 |
-40 (-40) | 31 | 20 |
Q355NF,
Q355MF | 20 (68) | 63 | 40 |
0 (32) | 55 | 34 |
-20 (-4) | 47 | 27 |
-40 (-40) | 31 | 20 |
-60 (-76) | 27 | 16 |
Physical Properties
Density: 7850 kg/m3 (0.284 lb/in3)
Melting point: 1450-1530 °C (2640-2800 °F)
Features and Applications
Q355 steel has good mechanical properties, good weldability, hot and cold processing properties and corrosion resistance. Can be used to manufacture ships, boilers, pressure vessels, petroleum storage tanks, bridges, power station equipment, lifting transport machinery and other higher load welded structural parts.
Q355 Steel Equivalent Grade
Q355 carbon steel equivalent material is listed in the table below including European EN standard (German DIN EN, British BSI, French NF…), ISO, Canada CSA (Canadian Standards Association), Australian/New Zealand and Indian IS standard.
物理性質(zhì)
密度：7850千克/立方米（0.284磅/立方英寸）
熔點(diǎn)：1450-1530°C（2640-2800°F）
功能和應(yīng)用
Q355鋼具有良好的機(jī)械性能、良好的可焊性、冷熱加工性能和耐腐蝕性?？捎糜谥圃齑啊㈠仩t、壓力容器、石油儲(chǔ)罐、橋梁、電站設(shè)備、起重運(yùn)輸機(jī)械等高負(fù)荷焊接結(jié)構(gòu)件。
Q355鋼等效等級(jí)
Q355碳鋼等效材料如下表所示，包括歐洲EN標(biāo)準(zhǔn)（德國(guó)DIN EN、英國(guó)BSI、法國(guó)NF…）、ISO、加拿大CSA（加拿大標(biāo)準(zhǔn)協(xié)會(huì)）、澳大利亞/新西蘭和印度is標(biāo)準(zhǔn)。
China | ISO | European Union | Canada | Australian/New Zealand | Indian |
Standard | Grade | Standard | Grade | Standard | Grade (Material Number) | Standard | Grade – SI (Imperial) | Standard | Grade | Standard | Grade |
GB/T 1591 -2018 | Q355B | ISO 630-2 | S355B | EN 10025-2 | S355, S355JR (1.0045) | CSA G40.20-13/G40.21-13 | 350W (50W);
345WM (50WM) | AS/NZS 3679.1 | Grade 350;
350L0;
350L15 | IS 2062 | E350 (Fe 490) |
Q355C | S355C | S355J0 (1.0553) |
Q355D | S355D | S355J2 (1.0577) |
Related materials: Q235 Material (Q235A, Q235B, Q235C, Q235D) | S235JR (1.0038) | St52-3 Material (1.0570) | S235JRG2 | S235J0 (1.0114) | 1.0117 (S235J2) | S235JRC (EN 1.0122) | St37-2 (1.0037)
