GB/T700 Q235B is the most common used among carbon steel.It is equal to steel grades ASTM A36,JIS G3101 SS400,EN 10025-2 S235JR.BBN steel stocks carbon steel Q235B in coils shape and plate shape at port warehouses with many sizes.
Technical Requirements & Additional Services:
♦ Low temperature impacting test
♦ Cutting and welding as per end user s demands
♦ More striction on some chemical elements contains
♦ Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
♦ Ultrasonic test under GB/T2970,JB4730,EN 10160,ASTM A435,A577,A578
Mechnical property for GB/T700 Q235B Carbon steel:
|Q235B||≤ 16||> 16 ≤ 40||> 40 ≤ 60||> 60 ≤ 100||> 100 ≤ 150||> 150|
|Yield strength (≥Mpa)||235||225||215||215||195||185|
|Tensile strength (Mpa)||370-500|
Chemical composition for GB/T700 Q235B Carbon steel (Heat Analysis Max%):
|Main chemical elements composition of Q235B|
Comparison of A36, SS400 and Q235 plate:
As can be seen from data above, ASME standard A36 and China standard Q235 materials are named according to yield strength of material, and for SS400 is tensile strength. From the analysis of mechanical properties, A36 and SS400 are more equivalent, while Q235 material is less.
Substitution of A36, SS400 and Q235 steel plate
Although the Q235 steel grade steel plate has lower mechanical properties than A36 and SS400 material, but in actual operation process, as long as the buyers do not have special requirement, often these three kinds of materials can be substituted. If only from mechanical properties of materials, it is acknowledged that mechanical properties of A36 and SS400 are similar to those of high quality carbon structural steel 20#. Tensile strength of 20# steel is not less than 410; yield strength is not less than 245; mechanical properties of SS400 and A36 are about the same.
Different standard formulation parties:
A36 for American Standard ASME standard (ASTM specification equivalent) materials, SS400, Standard JIS G3101 (common structure with rolling steel) materials, Q235 GB700 standards GB material. GB700:Q235 G3101:SS400 JIS ASME:A36
Different chemical composition:
The content of Mn element in A36 due to the plate thickness (or diameter) of different instead, below 20mm, without Mn. Q235 of C, Si, Mn, S, P and other elements of the content have made a request, but SS400 as long as the S, P is less than 0.050, the other did not make a request.
Different mechanical property:
The tensile strength of A36 is Ksi 58~80 (about 400~550MPa), the yield strength is 36 Ksi (about 250MPa); the tensile strength of 370~500 is MPa Q235, and the yield strength is 235MPa; The tensile strength of 400~510 is MPa SS400, and the yield strength is 245MP (SS400 and Q235 s mechanical properties are all in the case of steel plate thickness less than 16mm).
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ength and anti-oxidant properties, have higher durable plastic. The production process is relatively simple, and good weldability, but normalizing cooling rate sensitive._GB/T 3077 12Cr1MoV Chemical Composition:__ _ Grade_ The Element Max (%)_ _ _ C_ Si_ Mn_ P_ S_ _ _ 12Cr1MoV_ 0.08~0.15_ 0.17~0.37_ 0.40~0.70_ 0.035_ 0.035_ __GB/T 3077 12Cr1MoV Mechanical Property:__ _ Grade_ 12Cr1MoV Mechanical Property_ _ _ Thickness_ Yield_ Tensile_ HB_ _ _ 12Cr1MoV_ mm_ Min Mpa_ Mpa_ HB_ _ _ 6-50_ 245_ 490_ _ _ _ 50-200_ 245_ 490_ _ __GB/T 3077 12Cr1MoV covers the following issues of hot rolled and forging alloy steel: the dimension, shape, weight, tolerance, engineering specification, test method, inspection rules, packaging, marking, and quality certificates._Read more
ance is very good._The 15CrMo-series Pearlite-heat-resisting steels have high thermal strength (Δb≥440mpa) and anti-oxidation at high temperature, and have certain capability of resisting hydrogen corrosion. Because of the high content of CR, C and other alloying elements in steel, the hardening tendency of steel is obvious and the weld ability is poor._15CrMo steel chemical composition:__ _ Grade_ 15CrMo steel chemical composition (mass fraction) ( % )_ _ _ _ C_ Mn_ Si_ Cr_ Mo_ Ni_ Nb + Ta_ S_ P_ _ _ 15CrMo_ 0.12 ~ 0.18_ 0.40 ~ 0.70_ 0.17 ~ 0.37_ 0.80 ~ 1.10_ 0.40 ~ 0.55_ ≤0.30_ __ ≤0.035_ ≤0.035_ __15CrMo mechanical properties of steel_Read more
alloy chromium, molybdenum, nickel case hardening steel. Oil Quenched & Tempered Hardness is 28-34 HR c. GB 20Cr steel Annealing delivery hardness less than 250HB.20Cr with a lower carbon content range, So GB 20Cr alloy steel have good weld ability._GB/T 3077 20CR Chemical composition:__ _ C(％)_ 0.18～0.24_ Si(％)_ 0.17～0.37_ Mn(％)_ P(％)_ _ _ S(％)_ ≤0.030_ Cr(％)_ 0.70～1.10_ 0.50～0.80_ ≤0.030 _ __GB/T 3077 20CR alloy steel mechanical property:__ _ Tensile Strength (σb/MPa)_ Yield point (σs/MPa)_ Elongation (δ5/%)_ Reduction of Area (ψ/%)_ Impact Absorbing Energy(Aku2/J)_ Brinell Hardness(HBS100/3000)_ _ _ Annealing or High Tempering_ _ _ ≥835_ ≥540_ ≥10_ ≥40_ ≥47_ ≤179_ __GB/T 3077 20CR steel application:_ 20CR steel is mainly used for making cam shaft, driven gears of small tractor. This kind of steel also is mostly used in the manufacturing of the high demand heart intensity, surface under wear, section under 30 mm or complex and not big load carburized parts (oil quenching), such as: machine tool transmission gear, gear shaft, worm and piston pins, claw clutch, etc._Read more
CrMo Chemical Composition_ _ _ Grade_ The Element Max (%)_ _ _ C_ Si_ Mn_ P_ S_ _ _ 30CrMo_ 0.26~0.34_ 0.17~0.37_ 0.40~0.70_ 0.035_ 0.035_ __30CrMo alloy steel plate Mechanical Property: __ _ Grade_ _ 30CrMo Mechanical Property_ _ _ Thickness_ Yield_ Tensile_ HB_ _ _ 30CrMo_ mm_ Min Mpa_ Mpa_ HB_ _ _ 6-50_ 785_ 930_ _ _ _ 50-200_ 785_ 930_ _ __GB/T 3077 30CrMo covers the following issues of hot rolled and forging alloy steel: the dimension, shape, weight, tolerance, engineering specification, test method, inspection rules, packaging, marking, and quality certificates.__ The standard applies to alloy structural steel bar 250mm maximum diameter or thickness. After consultation between the two sides of supply and demand, bar stock of diameter greater than 250 mm can also be provided.__Read more
is good. The working temperature is up to 500 ° C, the low temperature can be -100 ° C, and has high static strength and high fatigue strength, good hardenability, no tendency to overheat, small quenching deformation, and moderate machinability. However, this material has a first type of temper brittleness, and the weldability is not good. It needs to be preheated to 150-400 ° C before welding, and heat treatment is needed after welding to eliminate stress. Generally used after quenching and tempering treatment._35CrMo Steel Chemical Composition (%):__ _ Steel Grade_ C_ Si_ Mn_ P_ S_ Cr_ Mo_ Cu_ _ _ 35CrMo_ 0.32 to 0.40_ 0.17 to 0.37_ 0.40 to 0.70_ ≤ 0.030_ ≤ 0.030_ 0.80 to 1.10_ 0.15 to 0.25_ ≤ 0.30_ __35CrMo Alloy Steel Mechanical Properties:__ _ Grade_ Thickness_ Yield_ Tensile_ _ _ 35CrMo_ mm_ Min Mpa_ Mpa_ _ _ 6-50_ 835_ 980_ _ _ 50-200_ 835_ 980_ __Applications of 35CrMo Alloy Steel:_ 35CrMo alloy steel can be used to manufacture major parts in various machines that withstand impact, bending and high loads, such as rolling mill gears, crankshafts, connecting rods, fasteners, automotive engine spindles, axles, engine transmission parts, large motor shafts, bolts for boilers with operating temperatures below 400 °C, nuts below 510 °C, high pressure seamless thick-walled conduits for chemical machinery (450-500 ° C, non-corrosive media)._Equivalent:_ 35CrMo equivalent to US ASTM, European Germany DIN EN, British BS EN, France NF EN, Japanese JIS, and ISO standard._Read more
m-60mm_ Length: 5.8m 6m 9m 12m_40Cr Steel Chemical Composition:__ _ Grade_ C _ Si _ Mn _ S _ P _ Cr _ Ni _ Cu _ Mo _ _ _ 40Cr _ 0.37-0.44 _ 0.17-0.37 _ 0.50-0.80 _ ≤0.035 _ ≤0.035 _ 0.80-1.10 _ ≤0.30 _ ≤0.30 _ ≤0.15 _ __40Cr Steel Application: _ Used in making gear, the sleeve, spindle, crankshaft, spindles, pins, rods, screws, nuts, inlet valve.__Read more
0.38～0.25_ Si(％)_ ≤0.40_ Mn(％)_ 0.60～0.90_ P(％)_ ≤0.035_ _ _ S(％)_ ≤0.035_ Cr(％)_ 0.90～1.20_ Mo(%)_ 0.15～0.30_ _ _ _ __42CrMo Mechanical Property: __ _ Grade_ Thickness_ Yield_ Tensile_ HB_ _ _ 42CrMo_ mm_ Min Mpa_ Mpa_ HB_ _ _ 6-50_ 930_ 1080_ _ _ _ 50-200_ 930_ 1080_ _ __GB T-3077 42CRMO standard applies to manufacture of bearing ring steel pipe rolling elements made by high-carbon chromium bearing steel processed with hot rolled forged round, steel wire, cold rolled.__Read more
enum._50CrMo4 steel with a particular composition are dedicated for vehicles and machines that require high hardness and are subject to strong bending, twisting, abrasion and wear loads._Chemical composition (%) of steel 50CrMo4:__ _ C_ Si _ Mn _ P _ S _ Cr _ Mo _ _ _ 0.46 - 0.54 _ max 0.4 _ 0.5 - 0.8 _ max 0.025 _ max 0.035 _ 0.9 - 1.2 _ 0.15 - 0.3 _ __GB/T 3077 50CrMo4 Mechanical properties:__ _ Yield_ Rp0.2 (MPa)_ Tensile_ Rm (MPa)_ Impact_ KV/Ku (J)_ Elongation_ A (%)_ _ _ 182 (≥)_ 769 (≥)_ 44_ 32_ __GB/T 3077 50CrMo4 steel application:_ 50CrMo4 steel is used as semi-finished products for the manufacture of components such as crankshafts, cogwheels, heavy-duty axles, gears, valves, heavy-duty screws, thrust rollers, guides, articulated joints, thrust rings, bolts or bushes.__Read more
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