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ASTM A437 Grade B4B Round bar On-hand Stock

ASTM A437 Grade B4B, A Martensitic Stainless Steel also known as AISI 422, DIN 1.4935, JIS SUH616, ASTM B4B,,, Equivalent standards are similar to one or more standards provided by the supplier.
Product parameters
Material Category:: Martensitic Stainless Steel Series
Material Technical Standards:: ASTM A437 / 437M
Stocklist & Inventory Available:: Diameter 15 ~ 220mm
Melting Process Route:: EAF + VD + LF / BEF + ESR
Min. order quantity Per Batch:: 500 kg
Mode of transportation:: Sea shipment, Air cargo or international courier
Heat Treatment Practice:: Hardened 1030 ℃, water or air cooled, tempered 650 ℃ min, 2 times tempered
Surface Condition:: Rough turned, shot blasted, centre ground
Ultrasonic Test Standard:: ASTM E2375 / MIL-STD- AMS 2154 / SEP 1923 / GB/T 4162 / EN 10228-3 / EN 10308
Unit price: Negotiable based on the order size
Production Lead Time:: Within 5 days after 30% deposit prepayable
Company ISO Register No:: UQ211218R0
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Description

Description:
ASTM A437 Grade B4B is a hardenable stainless steel designed for use at temperatures of up to 1200F. X20CrMoWV12-1 has good resistance to scaling and oxidation. Through heat treatment, high mechanical properties can be developed. X20CrMoWV12-1 is used in applications such as compressors or steam turbines and also in aircraft parts, valves, high temperature bolting, and other mechanical parts used in high temperature circumstances.

 


Equivalent Grades
DIN ASTM AISI UNS JIS Other
1.4935
X20CrMoWV12-1
Grade 616 422 S42200 SUH 616 10705BU
AMS 5655


Chemical Composition (Mass weight - %)
C Si Mn P S Cr Ni Mo Other
0.20 ~ 0.25 0.20 ~ 0.50 0.50 ~ 1.00 ≤ 0.025 ≤ 0.025 11.0 ~ 12.5 0.50 ~ 1.00 0.90 ~ 1.25 W 0.90 ~ 1.25
V 0.20 ~ 0.30


Mechanical Properties Under Room Temp.
Condition of heat treatment Tensile Rm(MPa) Yield Rp0.2(MPa) Elongation
A (%)
Reduction in cross section on fracture
Z (%)
Impact AKV/AKU(J) Brinell Hardness(HBW)
annealed - - - - - ≤ 248
Hardened 1022℃ ~ 1050℃ air or oil cooled, ≥620℃ X 2H, tempered ≥ 965 ≥ 760 ≥ 13.0 ≥ 30.0 ≥ 11 302 ~ 352
Hardened 1022℃ ~ 1050℃ air or oil cooled, ≥677℃ X 2H, tempered ≥ 825 ≥ 585 ≥ 17.0 ≥ 35.0 ≥ 20 241 ~ 285

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