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Basic Info.
Product Description
Large Stock 3sp 5sp 35cg Mild Ms 100*100 150*150 120*120 Q195 Q235 A36 Square Steel Billet
| product name | round square bar/billet | |
| Width(mm) | 5mm*5mm-500*500mm | |
| Length(mm) | 600-12000mm | |
| Technology | hot rolled/cold rolled/cold drawn | |
| Material | ASTM | A36, Grade 36, Grade 40 Grade 50, Grade 60, Grade 80,etc |
| DIN | Ck10,Ck15,Ck22,Ck25,Ck30,Ck35,Ck40,Ck45,Ck50, 30Mn4,40Mn4,etc | |
| BS | 040A04,095M15,045M10,080A40,045M10,080M50,etc | |
| GB | Q195, Q215, Q235, Q255, Q275, Q295, Q345, Q390, Q420, Q500, etc | |
| Standard | GB/T799,ASTM A29,A108,A321,A575,BS970,DIN1652,JIS G4051 | |
| Surface | Black painting, varnish paint, anti rust oil, hot galvanized, cold galvanized, 3PE | |
| Certificates | API5L ISO 9001:2008 TUV CE SGS BV etc | |
| Packaging | Loose package, Packaged in bundles(3Ton Max) , bundled pipes with two slings at the both end for easy loading and discharging, End with Plastic caps or as per requirement | |
| Application | 1. Fluid pipe 2. Power Plant 3. Structure pipe 4. High and low pressure Boiler tube 5. Seamless pipe /tube for petroleum cracking 6. Conduit pipe 7. Scaffolding pipe pharmaceutical andship,building etc. | |
| Tolerance | ±1% | |
| MOQ | 1 ton | |
| Supply Ability | 5000 tons / month | |
| Lead Time | 7-15 working days after the receipt of 30% deposit | |
| Payment Terms | 30%T/T Advance + 70% Balance | |
| Price Terms | FOB, CFR, CIF, EXW | |
| Packing | Standard sea-worthy package or as required | |
Chemical composition
| C | Si | Mn | P | S | Cr | Mo |
| 0.38-0.43% | 0.10-0.35% | 0.75-1.00% | ≤0.035% | ≤0.040% | 0.80-1.10% | 0.15-0.25% |
Equivalent Steel Grade
Din 1.7225
42CrMo4
JIS SCM440
GB 42CrMo
ASTM 4140
Mechanical Properties
| Tensile Strength (MPA) | Yield Strength (MPA) | Reduction (%) | Elongation (10%) | Impact Strength (Aku2/J) | Hardness (HB) |
| 1080 | 930 | 12 | 45 | 63 | Anneal≤217HB Q+T 28-32HRC |
Cold drawn steel types, shapes and sizes we can offer
besides the below shapes and sizes,we can also manufacture it based on customer's requests and customize different shapes and sizes.| Shapes | Sizes | Processing |
| Steel Round Bar | 5mm to 63.5mm | Cold Drawn |
| Steel flat Bar | 63.5mm-120mm | smooth-turned and polished. |
| Cold drawn steel square bar | 5*5mm to120*120mm | Cold Drawn |
| Cold drawn steel hex bar | 5mm to120mm | Cold Drawn |
| Cold drawn steel hexagonal bar | 5mm to 120mm (side to side) | Cold Drawn |
| Straightness | Max 1mm/m | |
| Tolerance | h9 h10 h11 or as required | |
| Dimension (mm) | Tolerance deviation grade | |||||
| Grade h8 | Grade h9 | Grade h10 | Grade h11 | |||
| 3.01-6.0 | 0-0.012 | 0-0.018 | 0-0.030 | 0-0.048 | 0-0.075 | |
| 6.01-10.0 | 0-0.015 | 0-0.022 | 0-0.036 | 0-0.058 | 0-0.090 | |
| 10.01-18.0 | 0-0.018 | 0-0.027 | 0-0.043 | 0-0.070 | 0-0.110 | |
| 18.01-30.0 | 0-0.021 | 0-0.033 | 0-0.052 | 0-0.084 | 0-0.130 | |
| 30.01-50.0 | 0-0.025 | 0-0.039 | 0-0.062 | 0-0.100 | 0-0.160 | |
| 50.01-80.0 | 0-0.030 | 0-0.046 | 0-0.074 | 0-0.120 | 0-0.190 | |
| h7 :grinding product h8 :high-precision cold drawn product h9:precision cold drawn product | h10:standard cold drawn product h11:special shaped cold drawn product | |||||
P roduct length(mm) & diameter
| Product variety | The length of finished product | Length tolerance |
| Cold drawn product | 1000-6000 | 0-+20 |
| Grinding product | 1000-4000 | 0-+20 |
| Product mode | Straightness tolerance |
| Standard cold drawn | 0.7/1000~0.5/1000 |
| Precision and high precision | 0.4/1000 |
| Product mode | Grinding | High precison cold drawn | Precision cold drawn | Stardard cold drawn |
| Surface roughness Ra(um) | 0.40 | 0.80 | 1.60 | 3.20 |
| Type of steel | GB | ASTM(SAE) | JIS |
| Carbon steel Low alloy steel | Q195,Q215, Q235,Q345 | A285MGr.B A570MGr.A | SS330 SS400,SS490... |
| Quality carbon steel | 10,20,35,40,60 20Mn,25Mn, 35Mn,40Mn | 1010,1020,1035, 1045,1060,1022, 1026,1037,1039 | S10C,S20C, S35C,S45C... |
| Alloy structure steel | 20Mn2,40Mn2,20Cr,40Cr, 20CrMo,35CrMo,42CrMo, 20CrMnTi,20Cr2Ni4, 40CrNiMo | 1320,1345,5120, 5140,4118,4135, 4140,3316,4340 | SMn420,SMn438, SCr420,SCr440 SCM430,SCM435 SCM440,SCN815 SNCM439 |
| Cold heading steel | ML10,ML20,ML30, ML35,ML35CrMo, ML42CrMo,ML15MnB | 1012,1020,1030 1034,4135,4140, 1518 | SWRCH10R SWRCH20K SWARCH35K SNB7 |
| Spring steel | 65Mn,60Si2Mn,50CrVA | 1066,6150 | SCP6,SCP10 |
| Bearing steel | GCr15 | E52100 | SUJ2 |
| Stainless steel | 1Cr13,2Cr13 | 412,420 | SUS410,SUS420 |
| Tooling steel | T8,T10 W6Mo5Cr4V2 | W1A-8, W1A-9.5,M2 | SK7,SK4,SKH9 |
| Free cutting steel | Y12,Y12Pb,Y15, Y15Pb,Y40Mn | 1212,11L08,1215 12L13,12L14,1141 | SUM21,SUM32, SUM22L,SUM42... |
Carbon/alloy square/round steel bar is ideal for many industrial products and applications where strength and durability are required. Characteristics of carbon steel bars are based on the carbon content. Increased carbon content will raise carbon steel's hardness and strength. Inversely, lower carbon content results in a softer (mild) carbon steel that is easier to machine and weld.
The type of carbon steel needed is generally based on the application requirements. If you need assistance in determining the right carbon steel bar for your job our sales team is happy to help. Contact us on how we can help you with your next project.
Certifications
We have 80 percent of the world's customers, a huge market from all over the world to visit our company.The quality of products is checked by professional scientific research personnel of precise instrument testing, with the complete certificate testing.
Our customers who buy our steel products cover Europe, Southeast Asia, Middle East, South America and Africa and many other countries and regions. Customers who visited our company is countless.Our products have won the world wide praise among our customers . Now, We are more and more famous in the steel industry. 
Q1.Are you a trade company or manufacturer?
We are a company integrating industry and trade.
Q2. Can I request to change the form of packaging and transportation?
A: Yes, We can change the form of the packaging and transportation according to your request, but you have to bear their own costs incurred during this period and the spreads.
Q3.Can you provide free sample?
Yes,you can get available samples in our stock.If the samples from new production, we will charge some reasonable cost, but this amount will be deducted from your first order.
Q4. How can I get a quotation from you ?
You can leave us message, and we will reply every message in time. Or we may talk on line by Trademanager.And you can also find our contact information on contact page.
Q5.How can you garantee what I got will be good ?
We are factory with 100% predelivery inspection which garantee the quality.And as Steel supplier on Made in China. Made in China assurance will make garantee,which means Made in China will pay your money back in advance if there is any problem with the products.
Q6.Can I have my own logo on the product?
Of course!We are a custom service,it includes customized packaging,customized logo,graphic customization.
Q:How about the Payment?
If pay by T/T, we will charge 20% deposit before production and received the balance before shipment. Another way is irrevocable L/C at sight.
With concept of "Keep Improving,Win-win Cooperation",and executed by reliable quality and after sales service system, Kunda gained good reputation from customers at home and abroad.We sincerely welcome you come to our company negotiate business and make great achievement together !
Any inquiry or new order, feel free to contact me.