Astm A193 Alloy Steel Round Bar B16 Grade 1/2" - 4"

Place of Origin CHINA
Brand Name QBH
Certification ISO9001
Model Number A193-B16
Minimum Order Quantity 900kg
Price Negotiation
Packaging Details 900KG/PALLET
Delivery Time 30days
Payment Terms L/C, T/T,OA
Supply Ability 600TON/MONTH

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Product Details
Material 42CRMO Size 1/2"-4"
Surface Treatment Plain,Zinc,Black,H.D.G Grade B16
Sample Free Sample Packaging 25kg Carton+900kg/Pallet Or Specific Packing
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B16 Grade Alloy Steel Round Bar


ASTM A193 Fully Threaded Studs


Astm A193 B16 Alloy Steel Round Bar

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Product Description

Astm A193 B16 Alloy Steel Round Bar B16 Stud Bolt

A193 B16 Alloy Steel Round Bar

      ASTM A193 Grade B16 bolts and threaded studs are manufactured from a chromium-molybdenum-vanadium alloy steel. Although A193 Grade B16 bolts and studs have similar strength requirements as Grade B7, the vanadium and higher tempering temperature helps the fasteners retain their molecular structure and strength under higher ambient temperatures than Grade B7. Grade B16 bolts and studs are used in the power and petrochemical industries on boilers, turbines, and other pressurized equipment with elevated temperatures. Unlike the stainless steel grades within the A193 specification, Grade B16 has no corrosion-resistant properties unless they are coated.

     The ASME A193 designation covers fasteners intended for use in pressure vessels, valves, flanges, and fittings. The addition of vanadium makes this heat treated chromoly steel (AISI 4140) particularly resilient in high temperature environments. A-193 B16 is considered as the most suitable for bolts used at temperature below 450°C with a minimum effect on its structural strength up to 1,100°F.



                 ASTM A193 B16 Chemical Properties and Physical Characteristics

C Mn P S Si Cr Mo Al V
0.36-0.47 0.45-0.70 0.035 Max 0.04 Max 0.15-0.35 0.80-1.15 0.50-0.65 0.015Max 0.25-0.35
Dia Minimum
° F (°C)
min, ksi
( MPa)
Strength. min,
0.2% offset, Ksi
( MPa)
Elongation in
min %
Reduction of
min %
21/2" and under 1200(650) 125(860) 105(725) 18 50 321HB
or 35 HRC
21/2" to 4"
1200(650) 110(760) 95(655) 17 45 302HB
or 33 HRC
over 4" to 7" 1200(650) 100(690) 85(586) 16 45 227HB
or 29 HRC



Grade Diameter Tensile ksi, min Yield, ksi, min Elong, %, min RA % min HBW HRC
B16 Up to 2-1/2 125 105 18 50 321 max 35 max
Over 2-1/2 to 4 110 95 17 45
Over 4 to 8 100 85 16 45

Astm A193 Alloy Steel Round Bar B16 Grade 1/2" - 4" 0Astm A193 Alloy Steel Round Bar B16 Grade 1/2" - 4" 1Astm A193 Alloy Steel Round Bar B16 Grade 1/2" - 4" 2Astm A193 Alloy Steel Round Bar B16 Grade 1/2" - 4" 3










Packing in small boxes according to customer’s requirements

Packing in plastic bag according to customer’s requirements




EURO Pallet





The advantages of QBH

  • QBH brand sales to the main quality assurance.
  • Years of export trade management, excellent service, word-of-mouth guarantee.
  • By working with TUV,escort for quality.
  • Customization of non-standard parts can be made according to customer's requirements and drawings.
  • For quality customers,we can provide a certain credit period.




1. How do you let me trust you.
Jiaxing City Qunbang Hardware Co.,ltd hs its own right of import and export,QBH trademark in China,United States,European Union have been registered.At the same time,you can also check the registration information of our company in the China industry and Commerce system.
2. How about your price.
We will be based on different markets,for different quality and quantity,tailor-made prices for customers,in order to achieve win-win goal.
3. How do you control your quality.
Incoming quality contral( IQC)→Process Quality control(PQC)→Output quality control(OQC),and the random samples is sent to TUV for testing.If the customer received the goods and found quality problems,QBH company promises to be responsible for returning money or replenishing the goods
4. Could you provide free samples?
For new customer, We can provide free samples for standard fastener, But the clients will pay the express
charges. For old customer, We will send you free samples and pay express charges by ourself.
5. Do you accept small order?
QBH company can accept small orders if we have them in stock.Generally speaking,the stock probability of stainless steel fasteners is higher than that of carbon steel fasteners.
6. How about your delivery time
What we pursure is the high efficiency movement pattern,the stainless steel fastener delivery time about 15days,the carbon steel fastener will it about 30days
7. What is your packing.
Usually 25KG/carbon,36CTNS on the pallets,or 20-30kg/Bags,then on the pallet,QBH company personalized packagingis also available,like 10PCS/plastic bag or 10pcs/box,it can print some information
such as LOGO and pattern of customers.
8. What is your payment term
Normally,our terms of payment are TT and L/C,if we cooperate for a long time,we can reach the point of mutual trust,and fully support our customers to become bigger and stronger in the local market.
Not only in the price concessions,but also in the payment can also be made on credit,Specific credit sales time needs to be negotiated separately